CA2022272C - Vitrified bonded sol gel sintered aluminous abrasive bodies - Google Patents
Vitrified bonded sol gel sintered aluminous abrasive bodiesInfo
- Publication number
- CA2022272C CA2022272C CA002022272A CA2022272A CA2022272C CA 2022272 C CA2022272 C CA 2022272C CA 002022272 A CA002022272 A CA 002022272A CA 2022272 A CA2022272 A CA 2022272A CA 2022272 C CA2022272 C CA 2022272C
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- Prior art keywords
- silica
- abrasive
- particles
- sol gel
- aluminous
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1436—Composite particles, e.g. coated particles
Abstract
Vitrified bonded abrasive bodies prepared from sol gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by treating the surfaces of the grit particles so as to give them silica-enriched surfaces.
Description
~ ~ fO 2 2 ~ ~
BV-2311c VITRIFIED hO~ gOL GEL ~ K~ ~r~MTT'~8 ~R~-CIVE BODIES
Carole J. Markhoff-Matheny Salminen Drive Leicester, Massachusetts 01524 John Hay 51 Brook Street Shrewsbury, Massachusetts 01545 David Rostoker 10 Library Lane Sturbridge, Massachusetts 01566 TECHNICAL FIELD
This invention relates to vitrified (glass) bonded sol gel aluminous sintered abrasive bodies, i.e. grinding wheels, segments, sharpening stones, and the like, which are modified before firing by the addition of a silica-generating material to enhance the grinding performance of such bodies.
It has been found that treating the surface of aluminous sol gel abrasive particles with silica or a silica-generating material, e.g. colloidal silica or organic silicon-cont~ining compounds such as silicates, silanes, silicon ethers, silicon esters, and silicones, greatly improves the grinding performance of the resultant vitreous-bonded abrasive articles. The treatments have been found effective when performed during the manufacturing process before the abrasive particles are formed into an abrasive body.
BACRGROUND OF THE lNv~lON
The present invention is particularly directed to vitrified bonded grinding wheels prepared with sol gel aluminous abrasive grain. Vitrified bonded grinding wheels are different from resinoid bonded, i.e. phenol-aldehyde, wheels in that they use a glass phase to bond the grain and 2~27~
thus are processed at substantially higher temperatures (about 800~C. or higher for vitrified vs. about 400~C. or lower for resin). Due to the higher manufacturing temperature used, vitrified bonded wheels can withstand higher temperatures in use than can resinoid bonded wheels.
Also, it must be noted that sintered sol gel aluminous abrasive grain is known to be distinct from other aluminous abrasive grain, i.e. fused alumina. U.S. Pat. No.
4,543,107 discloses that vitrified wheels produced from sol gel grain must be processed at lower temperatures than similar wheels from fused alumina grain. Sol gel grain must be processed generally about llOO~C. or less for conventional vitrified bonds and about 12200C. or less for more viscous high alumina and silica bonds to yield satisfactory wheels.
Silicon-containing materials have been used as abrasive grain coatings and the like to provide improved properties for resinoid bonded wheels, i.e. phenol-formaldehyde and the like, which are processed at relatively low temperature, but not with vitrified bond wheels. This is not surprising because silicon-containing materials are known to improve the water repellency of many articles and resinoid-bonded grinding wheels are known to suffer degradation due to the effects of cooling water present during use. The silicon treatments of grain for resinoid wheels effectively "waterproofs" the resinoid-bonded abrasive articles to prevent strength degradation and to increase retention of grinding grade throughout the useful life of the resinoid-bonded abrasive article. Since vitrified-bonded abrasive bodies are inherently resistant to degradation from water, such treatments have not been performed. Moreover, since vitrified-bonded bodies are subjected to extremely high temperatures for forming, one would expect any organic silane present to be destroyed by the temperatures and thus not effect the performance of the 7 ~
resultant grinding wheel. With conventional fused aluminous grain, the expected destruction of the silane does occur, as is shown below.
Also, vitrified bonded wheels have previously been impregnated with molten sulfur, as a grinding aid. The molten sulfur is placed on the wheel after it has been fired and thus can not affect the individual alumina grains used to form the wheel.
Cottringer et al, U.S. Patent 4,623,364 describes the preparation of various ceramic bodies, including abrasive grits, by heating gels of alumina monohydrate seeded with crystalline alpha alumina or other materials capable of facilitating the conversion of alumina monohydrate to crystalline alpha alumina. Such seeded sol gel alumina abrasive grits are characterized by submicron sized alpha alumina crystals, high hardness, and a greater density than the sol gel abrasive grits produced by the Leitheiser et al teachings in U.S. Patent 4,518,397 which do not employ a seeding procedure.
Similarly, Schwabel, U.S. Patent 4,744,802, describes seeding or nucleating processes for producing dense, high hardness sol gel sintered alumina abrasive grits in which the nucleating agent is alpha ferric oxide.
For purposes of this application and the invention disclosed, the term "sol gel sintered alumina abrasive"
is intended to apply to abrasives produced by the teachings of any one of U.S. Patent No. 4,518,397, 4,623,364, and 4,744,802, as well as other sol gel techniques used in the art.
SUMMARY OF THE INVENTION
It has been found that treating the surfaces of aluminous sol gel abrasive grit particles, either alone or in combination with other abrasives, before the grit is B
- 2 a ~
formed into vitreous-bonded grinding body, with silica or a silica-generating material significantly improves the grinding performance of such bodies. The result is particularly unexpected since efforts to use the same treatments in the same manner with conventional fused aluminous abrasives, i.e. ones not prepared by a sol gel technique, yielded vitrified-bonded abrasive bodies showing no such improvement in grinding performance.
The phenomenon that has resulted in the improved grinding wheels is not fully understood, but is currently thought to be related to the increase in surface reactivity of the very fine crystals of sol gel sintered aluminous abrasives as compared to that of the much larger ultimate crystals of conventional fused alumina abrasives.
According to one broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond.
According to another broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond and wherein the sol gel sintered aluminous abrasive grit particles have a density of at least 95~ of theoretical density and include up to about 50~ by weight of an oxide selected from the group consisting of zirconia, titania, magnesia, ceria, spinel, hafnia, mullite, manganese dioxide, precursors of these oxides, and mixtures thereof.
According to another broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond and wherein the body consists essentially of about 30 to 60 volume ~ abrasive, about 3 to 40 volume ~ bond, and about 0 to 67 volume pores.
, ,~
'- ~0 ~ ~7~
According to a further broad aspect, the invention relates to a method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprise coating said particles with a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to convert the silicon compound to silica and to fix the silica to the surfaces and wherein the particles are coated with about 0.5 to about 3 weight percent of the silicon compound.
According to a further broad aspect, the invention relates to a method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprise coating said particles with a silica material and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix the silica to the surfaces and wherein the particles are coated with about 0.5 to about 3 weight percent of the silica.
According to another broad aspect, the invention relates to a method of improving the grinding performance of a vitrified-bonded sintered sol gel aluminous abrasive body which comprises coating individual sintered sol gel aluminous abrasive grit particles which are used to prepare the body with about 0.5 to about 3 weight percent of a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix a silica coating to the surfaces of the particles and to form silica-enriched surfaces.
DETAILED DESCRIPTION OF THE INVENTION
The vitrified bonded abrasive bodies of the present invention are comprised of sol gel aluminous grits, at least a portion of which have been treated with silica or a silica-generating material, and a vitreous bond.
The aluminous grits are prepared by a sol gel technique which entails crushing and firing a dried gel B
20 ~2 ~7~
prepared from a hydrated alumina such as microcrystalline boehmite, water, and an acid such as nitric acid. The initial sol may further include up to 10-15~ by weight of spinel, mullite, manganese dioxide, titania, magnesia, ceria, zirconia powder or a zirconia precursor which can be added in larger amounts, e.g. 40~ or more, or other compatible additives or precursors thereof. These additives are normally included to modify such properties as fracture toughness, hardness, friability, fracture mechanics, or drying behavior. In its most preferred embodiment, the sol or gel includes a dispersed submicron crystalline seed material or a precursor thereof in an amount effective to facilitate the conversion of the hydrated alumina particles 4b ,~
'-- 2 ~ 7 to alpha alumina upon sintering. Suitable such seeds are well known to the art. The amount of seed material should not exceed about 10 weight % of the hydrated alumina and there is normally no benefit to amounts in excess of about 5%. If the seed is adequately fine (preferably abut 60 m2 per gram or more), amounts of from about 0.5 to 10% may be used with about 1 to 5% being preferred. The seeds may also be added in the form of a precursor such as ferric nitrate solution. In general, the seed material should be isostructural with alpha alumina and have similar crystal lattice dimensions (within about 15%) and be present in the dried gel at the temperatures at which the conversion to alpha alumina occurs (about 1000 to llOOoC.). The preparation of suitable gels, both with and without seeds, is well known in the art as are the crushing and firing procedures and thus further details thereon are readily available in the literature and are not included here.
Each aluminous grit so prepared is made up essentially of numerous noncellular alpha alumina crystals having crystal sizes of less than about 10 microns, preferably less than about 1 micron. The abrasive has a density of at least about 95% of theoretical density.
The aluminous grits are then treated with silica or a silicon compound which will generate silica on the surfaces of the grits during the firing of an abrasive body made with the treated grits. Any silicon-containing compound which yields a silica-enriched surface on individual grit particles either before or after firing may be used in the present invention. Silicon compounds suitable for use herein include colloidal silica as well as organic silicon-containing compounds such as silanes, silicates, silicon ethers, silicon esters, and silicones.
The particular source of the silica-enriched surface has not been found to be critical, though different sources have been found to produce differences in grinding performance 1 ~3 ~ ~
and the best results to date have been observed when colloidal silica has been used ad the treating agent. The observed difference in performance may be due to the level of adherence of a particular silicon compound to the grit surfaces, or the extent of conversion of the silicon compound to silica under the particular firing conditions used, or the depth of the silica-enriched layer, or the degree of compression generated in the abrasive body by the presence of the silica.
Preferably, the silicon compound will be silica per se, e.g. fumed silica, colloidal silica or silica gel, or an organic silane, more preferably one having functional groups which will assist in producing a more uniform coating on individual sol gel aluminous grits. Examples of such functional groups include: amino, vinyl, acrylo, methacrylo, and mercapto. Silanes containing these functional groups are readily available from numerous commercial sources. The use of fumed silica is particularly advantageous whether alone or in a mixture with a silica-generating material such as a silane.
The treatment of the sol gel aluminous grits with the silicon compounds may be readily accomplished by uniformly blending the grits with the desired amount of the silicon compound with sufficient mixing to ensure uniformity. The treatment may be performed at any point in the manufacturing process before the grit and bond are formed into the desired abrasive body. Most conveniently, the silicon compound will be added to the grit with mixing as the first step in producing the abrasive body, followed by a precursor to the vitrified bond and any other desired ingredients. Alternatively, the grit can be pre-treated with the silicon compound by mixing them together and then storing the treated grit for subsequent use in forming an abrasive body. Since silicon compounds generally wet the surfaces of sol gel aluminous grit, nothing more than 2~232~i7 routine ~;x;ng has been found necessary with the specific silicon compounds elevated.
As indicated, the abrasive bodies of the present invention are comprised of aluminous grits, at least a portion of which have been treated as described, and a vitrified bond. The specific amounts of abrasive and bond used may vary widely. Suitable compositions can range from about 3 to 76% bond, about 24 to 62% abrasive, and about O
to 73% pores, all by volume. Preferably, the bodies will comprise about 3 to 39% bond, about 30 to 56% abrasive, and about O to 67~ pores. conventional pore inducing media such as hollow glass beads, solid glass beads, foamed glass particles, bubbled alumina, and the like may be incorporated into the present bodies thereby providing more latitude with respect to grade and the structure number variations.
The abrasive products of this invention are bonded with a vitrified bond. Any conventional vitrified bond composition may be used in the present invention, provided that it does not mature at a temperature so high that there is a detrimental interaction between the bond and the sol gel aluminous grit. Generally a bond requiring a relatively low firing temperature, i.e. below about llOOoC., will be used. Suitable vitrified bond compositions are commercially available from 0. Hommel Company of Pittsburg, PA, and others. The bond may include up to about 50~ by volume fillers or grinding aids, as is well known in the art.
Vitrified bonds, while amenable to the incorporation of fillers, somewhat limit the useful materials because of the high temperatures required to mature such bonds. Thus suitable fillers include such materials as kyanie, mullite, nepheline syenite, graphite, and molybdenum disulfide, depending upon the maturing temperature of a particular vitrified bond.
After firing at conventional conditions determined primarily by the actual bond used, the vitrified bonded body 2C~22 ~
".,, may be impregnated in a conventional manner with a grinding aid, such as molten sulfur, or with a vehicle, such as epoxy resin, to carry a grinding aid into the pores of the wheel.
In addition to fillers and grinding aids, the abrasive bodies may include one or more second abrasives in amounts of about 1 to 90% by volume of the total body. The second abrasive may act as a filler as, for example, if it is finer in grit size, or as an auxiliary or secondary abrasive, it is coarser. In some gr;n~;ng applications the second abrasive will function as a diluent for the coated sol gel aluminous abrasive grit. In other applications, the second abrasive may even enhance the overall grinding properties of the vitrified-bonded product, either in overall efficiency or in finish imparted to the material being ground. The second abrasive may be a fused alumina, cofused alumina-zirconia, sintered alumina-zirconia, silicon carbide, cubic boron nitride, diamond, flint, garnet, bubbled alumina, bubbled alumina-zirconia, and the like.
The treated sol gel abrasive grit and the vitrified bonded bodies containing said grits are, in general, superior to prior art untreated abrasives as the following examples show. The abrasive bodies are suitable for grinding all types of metal such as various steels like stainless steel, cast steel, hardened tool steel, cast irons, for example ductile iron, malleable iron, spheroidal graphite iron, chilled iron and modular iron, as well as metals like chromium, titanium, and aluminum. As is the case with all abrasives and the vitrified bonded bodies containing them, the abrasives and the bonded bodies of the invention will be more effective grinding some metals than others and will be more efficient in some grinding applications than in others. Outstanding portable, cut-off, precision, segment, track grinding, and tool sharpening wheels result when the abrasive utilized therein is the treated abrasive described herein.
2 ~ 7 In the following non-limiting examples, all parts and percents are by weight unless otherwise specified.
Also, the term "abrasive grit" is used herein to refer to individual particles of the abrasive material.
E~MPLE I
Sintered seeded sol gel alumina abrasive grits in ANSI size 54 were produced according to the teachings of commonly-owned U.S. Patent No. 4,623,364 and used to make test wheels according to the teachings of U.S. Patent No.
4,543,107. The procedures described therein were utilized except hat the abrasive grits were treated respectively with 1.5% by weight of specific silicon cont~;n;ng compounds, i.e. various silanes or colloidal silica, immediately prior to mixing with the vitreous bond.
Test wheels 5" (127 mm) in diameter by ~" (12.7 mm) thick with l~" (31.75 mm) hole were made for the grinding tests with each variation. After firing, the face of each wheel was reduced in width to ~" (6.345 mm) before testing. The manufacturing procedure for each wheel was as follows:
Wheel A (StAn~l~rd wheel) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 29 cc of water. While mixing continued, 12 g of dextrin followed by 119.7 g of bond F, the composition of which is given in Table I, and 20 additional grams of dextrin were added. After two minutes of ln;x;ng following the final dextrin addition, the mix was pressed into wheels. Each wheel as pressed weighed 367.9 g and had a pressed volume of 168.05 cc.
2~a~ J72 Wheel B (Y9576~ treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of phenylaminoalkyltrimethoxysilane obtained from Union Carbide Co., Tarrytown, NY, an Y9576~ organo-functional silane. While mixing continued, 14 cc of water, 12 g of dextrin, 119.7 g of bond F and an additional 20 g of dextrin were added. Mix time, pressed wheel weights and volumes were the same as for Wheel A.
Wheel C (A1102~treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighted into a mixing bowl and wetted with 15 g of an aminosilane obtained from Union Carbide as A1102~
organo-functional silane. While mixing continued, 14 cc of water, 12 g of dextrin, 119.7 g of bond F, and an additional 20 g of dextrin were added. Mix time, pressed wheel weights and volumes were the same as Wheel A.
Wheel D (Y9492~ treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of aminoalkyltrioxydisilane obtained from Union Carbide as Y9492~ amino-functional silane. With continued mixing 50 cc of water, 12 g of dextrin, 119.7 grams of bond F, and an additional 20 g of dextrin were added. After two minutes of ~;x;ng, the mix was pressed into wheels with each wheel weighing 378.8 g as pressed and having a pressed volume of 168.05 cc.
Wheel E (colloidal silica treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of colloidal silica obtained from E.I. DuPont Co., Wilmington, DE, as Ludox AS-40~. While ~;xing continued, 14 - 2~22~72 cc water, 12 g destrin, 119.7 g bond F and an additional 20 g dextrin were added. After two minutes of mixing, the mix was pressed into wheels having pressed wheel weights and volumes as in Wheel A.
The composition of bond F, the vitreous bond used in all of the test wheels, is given in Table I. Because this bond is a fritted bond, its un-fired and fired compositions are the same.
TAB~B I
F~ED OXID~ CONPOSITION OF BOND F, % BY W~IGHT
SiO2 63.0 Al2O3 12.0 Fe203 0 . 1 CaO 1.1 MgO 0.1 Na2O 6.2 K2O 7.5 B203 10 . O
TOTAL 100.0 Wheels A through E were each air dried and fired to 900OC. in air for 43 hours and then soaked at that temperature for 16 hours before being allowed to cool to room temperature. After firing, the wheels were prepared for a slot grinding test by reducing the width of the face to ~" (6.35 mm).
A dry slot grinding test was made on D3 tool steel hardened to Rc60 with length of slot 16" (40.64 cm). Tests were made using a Brown and Sharpe surface grinder with wheel speed set to 6500 sfpm (33.02 smps) and table speed 2@~:2~7~
set to 50 fpm (0.254 mps). Tests were conducted at three downfeeds: 0.5, 1, and 1.5 mils per double pass (0.0127, O.0254, and 0.0381 mm) all to a total of 100 mils (2.54 mm) except 100.5 mils (2.667 mm) t 1.5 mils downfeed. Wheel wear, metal removal, and power were measured at each infeed rate. The test results are shown in Table II.
TABLB II
DRY 8LOT GRINDING RESU~T8 ON D3 8TEEL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hn~ (J3oules/-ln) mm ) A None 0.5 57.8 4.18 2.135.81 1.0 47.5 6.97 2.998.16 1.5 41.8 9.25 3.639.91 B Y9576~ 0.5 58.2 4.22 2.296.25 1.0 60.8 9.18 3.399.25 1.5 61.6 13.64 4.2311.55 C A1102~ 0.5 46.9 3.37 2.316.31 1.0 57.3 8.45 3.439.36 1.5 60.8 11.33 4.2511.60 D Y9492~ 0.5 55.0 4.22 2.155.87 1.0 60.8 9.19 2.968.08 1.5 88.4 19.58 3.6710.02 E Colloidal 0.5 50.9 3.65 2.296.25 Silica 1.0 82.6 12.23 2.968.08 1.5 107.123.85 3.649.93 G-ratio, (S/W), as a measure of the volume of metal removed per unit volume of wheel wear is one of the measures of a grinding wheel's performance since it determines the-total volume of metal removal before a wheel 2~22~7:~
must be replaced. Another, even more significant measure of a grinding wheel's utility is the Quality measure (S2/W) which takes into account not only the amount of metal that a wheel can remove but also the rapidity with which it does so. From the data in Table II, it is apparent that both G-ratio and Quality were markedly improved by all of the silica-generating wheel treatments tested. This is particularly true for the higher infeed rates which more nearly represent the condition of actual use of the wheels.
At the heaviest infeed, wheel W (treated with colloidal silica) showed a G-ratio 156% greater and a Quality 158%
greater than the untreated wheel A. Similarly, wheel D
(Y9492~ silane treated) showed a 111% greater G-ratio and a 112% greater Quality.
ExaMpL~ II
Wheels prepared as in Example I were further evaluated in grinding tests using a water-based coolant, E55~, from White & Bagley Company, Worcester, MA, diluted 1:40 with tap water. The tests were made on 4340 steel hardened to Rc55 with wheel speed set at 8500 SFPM (43.2 smps). Other test conditions were as in Example I, except that no 1.5 mil infeeds were made. The results of the wet grinding test are shown in Table III.
2~2~27~
TABLE III
~BT 8LOT GRINDING RE8~T8 ON 4340 8TEEL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) in~in) mm3) A None 0.5163.4 11.1 2.546.93 1.0 89.4 13.0 4.0311.00 B Y9576~ 0.5214.1 18.7 2.236.25 1.0119.4 18.4 4.5112.31 C A1102~ 0.5237.7 18.7 2.978.11 1.0 97.0 14.5 4.9113.40 D Y9492~ 0.5433.9 28.05 2.406.55 1.0199.0 31.84 3.549.66 E Colloidal 0.5360.4 18.65 2.316.31 Silica 1.0155.8 20.18 3.9610.81 Again, substantial improvement in grinding performance occurred with all of the treatments tested.
Wheels D and E again showed the best results. Wheel D at ~
mil downfeed showed a 166% improvement in G-ratio and a 145%
improvement in Quality. For the other treated wheels, improvements in G-ratio ranged from 31% for Wheel B to 121 for Wheel E while improvements in Quality ranged from llT
for Wheel C to 7OT for Wheel E.
EXAMPL~ III
A further series of test wheels was made using increasing amounts of silane Y9576~ which had been used at a level of 1.5% in Wheel B in Example I. Three additional test wheels F, G, and H were made using 0.5% 1.0%, and 2% of silane Y9576~ respectively. The manufacturing procedure was 2 ~v 2 ~
identical to that of Wheel B except that 5, 10, and 20 g, respectively, of the Y9576~ silane were used per 1000 grams of abrasive grits. Together with Wheel A (0%) and Wheel B
(1.5% Y9576~), Wheels F, G, and H comprise a series in which increasing amounts of the silane were evaluated. The same procedures of test grinding, i.e. dry on hardened D3 steel and wet on 4340 steel, were used as in Examples I and II.
The dry grinding results are shown in Table IV and the wet gri~; n~ results in Table V.
TABLB IV
DRY 8LOT GRINDING RBS~LTS ON D3 STEBL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/-in min) mm3) A None 0.5 57.84.18 2.135.81 1.0 47.56.97 2.998.16 1.5 41.89.25 3.639.91 B 0.5% 0.5 50.43.60 2.386.50 Y9576~ 1.0 46.86.85 2.998.16 l.S 38.08.47 3.639.91 C 1.0% 0.5 S4.74.18 2.175.92 Y9S76~ 1.0 64.19.42 3.128.S2 l.S 48.710.89 3.8310.46 D l.S% 0.5 S8.24.22 2.296.25 Y9S76~ 1.0 60.89.18 3.399.25 l.S 61.613.64 4.23ll.S5 E 2.0% 0.5 48.13.61 2.206.01 Y9S76~
1.0 S4.08.06 3.2S8.87 l.S 7S.016.S8 4.2911.71 2~2~72 TABLE V
WBT 8LOT GRINDING RE8UBT~ ON 4 3 4 0 8TEEI.
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/
in'min) -mm3) s A None 0.5163.4 11.1 2.546.93 1.089.4 13.0 4.0311.00 F 0.5% 0.5164.1 11.2 2.406.55 Y9576~ 1.097.6 14.7 3.7310.18 G 1.0% 0.5358.7 28.3 2.266.17 Y9576~ 1.0143.4 21.96 4.0411.02 B 1.5% 0.5214.1 18.7 2.236.25 Y9576~ 1.0119.4 18.44 4.5112.31 H 2.0% 0.5360.4 18.65 2.316.31 Y9576~ 1.0133.6 19.86 3.8810.59 The dry grinding results in Table IV for this particular silane treatment indicate that increasing its amount above 0.5% improved performance and 1.5% was nearly as effective as 2.%. The wet grinding results in Table V
were similar in that 0.5% Y9576~ had little effect. In this wet grinding test, it appears that 1.5% represents the optimum amount for this silane while both 1.0% and 2.0%
loadings gave very similar performance.
CONPARATIVI~ EILl~MPI.E A
The procedures of Examples I and II were repeated except that the sol gel aluminous grit was replaced by a fused alumina abrasive having a few relatively large crystals, i.e. about 50 to 100 microns, and of similar high purity to the sol gel grit. Grinding wheels J and K were 2~. 227 ~.
prepared as in Example I. Wheel J was like Wheel A in that it contained no silicon-treated grit and Wheel K was like Wheel B in that 1.5% phenylaminoalkyltrimethoxysilane obtained from Union Carbide as Y9576~ organo-functional silane was mixed into the grit prior to adding the other wheel forming ingredients.
The two wheels were evaluated on the same materials as in Examples I and II under both dry and wet gr; n~ i ng conditions. The dry grinding results are shown in Table A and the wet gr;n~;ng results in Table B.
Dry 81Ot Grindin~ Re~ults on D3 8te~1 Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (S2/W) ( 3/ (Joules/-in min) mm3) J None 0.5 11.6 0.81 2.73 7.45 l.0 13.9 1.95 4.24 11.57 1.5 14.1 2.97 4.93 13.45 K 1.5% 0.5 9.3 0.62 2.81 7.67 Y9576~ 1.0 11.4 1.56 4.13 11.27 1.5 13.0 2.73 5.02 13.70 2 ~ r ~ 2~ 2 ~ ~
TABLE B
Wet 81Ot Gr; n~; n~ Results on 4340 SteQl Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/-i in) mm3) J None 0.5 68.1 4.90 3.60 9.82 1.0 46.1 6.61 4.80 13.09 K 1.5% 0.5 66.3 4.92 3.72 10.26 Y9576~ 1.0 42.0 6.12 5.04 13.75 As can be readily seen from the similarity of results between the untreated and silane treated samples in both Tables A and B, the silane treatment did not change the grinding performance of the fused alpha alumina abrasive grit.
It is to be understood that means of enriching the surface of sol gel aluminous abrasives with silica other than those directly cited will be apparent to those skilled in the art and that these other means are intended to be within the scope of this invention.
EXAMPLE IV
Wet Slot Grin~;n~ Results on 52100 Steel Two sets of wheels were prepared, each with the dimensions 5" x ~" x 7/~1l. Both sets used 80 grit seeded sol gel alumina and were prepared by the general t~chn;que described in Example I (Wheel A) except as indicated below.
The grits used in the two sets of wheels were prepared differently. One batch was untreated, while the other was treated with fumed silica by mixing together 1200 gm of the aluminous grits, 6 gm of deionized water, 23.4 gm 2~ 2272 of an animal glue-based aqueous binder and 4.92 gm of Cab-o-Sil fumed silica available from Cabot Corporation under the designation C8549. This gave an amount of silica in the wheel of about 0.41 weight %. Both batches were mixed with 174.96 gm of Bond F (From Example I) and dried and fired to form the wheels.
The wheels made from grits treated with fumed silica had similar physical characteristics to those from untreated grits except that they had a significantly lower sand blast penetration valve (3.08 as opposed to 3.63).
When evaluated on 52100 steel hardened to Rc 60-62 in a wet, external plunge grinding test, using 5% W.S. Oil as coolant, and a wheel speed of 8500 s.f.p.m., the results set forth on Table VI were obtained.
T~8LE VI
Wheel Feed G- MRR WWR Power Surface (in/sec)Ratio Hp/in Finish (Ra) Untreated 0.0010160.4 0.668 0.00417 2.2727 0.002296.4 1.432 0.0148S 3.3350 0.003342.2 2.149 0.05092 3.67106 Fumed 0.0010207.8 0.668 0.00232 2.0028 Silica Treated 0.0022103.5 1.476 0.01426 2.9343 0.003355.8 2.167 0.03881 3.0782 As can be seen from the above, the fumed silica treatment significantly improved the G-Ratio while consuming less power.
BV-2311c VITRIFIED hO~ gOL GEL ~ K~ ~r~MTT'~8 ~R~-CIVE BODIES
Carole J. Markhoff-Matheny Salminen Drive Leicester, Massachusetts 01524 John Hay 51 Brook Street Shrewsbury, Massachusetts 01545 David Rostoker 10 Library Lane Sturbridge, Massachusetts 01566 TECHNICAL FIELD
This invention relates to vitrified (glass) bonded sol gel aluminous sintered abrasive bodies, i.e. grinding wheels, segments, sharpening stones, and the like, which are modified before firing by the addition of a silica-generating material to enhance the grinding performance of such bodies.
It has been found that treating the surface of aluminous sol gel abrasive particles with silica or a silica-generating material, e.g. colloidal silica or organic silicon-cont~ining compounds such as silicates, silanes, silicon ethers, silicon esters, and silicones, greatly improves the grinding performance of the resultant vitreous-bonded abrasive articles. The treatments have been found effective when performed during the manufacturing process before the abrasive particles are formed into an abrasive body.
BACRGROUND OF THE lNv~lON
The present invention is particularly directed to vitrified bonded grinding wheels prepared with sol gel aluminous abrasive grain. Vitrified bonded grinding wheels are different from resinoid bonded, i.e. phenol-aldehyde, wheels in that they use a glass phase to bond the grain and 2~27~
thus are processed at substantially higher temperatures (about 800~C. or higher for vitrified vs. about 400~C. or lower for resin). Due to the higher manufacturing temperature used, vitrified bonded wheels can withstand higher temperatures in use than can resinoid bonded wheels.
Also, it must be noted that sintered sol gel aluminous abrasive grain is known to be distinct from other aluminous abrasive grain, i.e. fused alumina. U.S. Pat. No.
4,543,107 discloses that vitrified wheels produced from sol gel grain must be processed at lower temperatures than similar wheels from fused alumina grain. Sol gel grain must be processed generally about llOO~C. or less for conventional vitrified bonds and about 12200C. or less for more viscous high alumina and silica bonds to yield satisfactory wheels.
Silicon-containing materials have been used as abrasive grain coatings and the like to provide improved properties for resinoid bonded wheels, i.e. phenol-formaldehyde and the like, which are processed at relatively low temperature, but not with vitrified bond wheels. This is not surprising because silicon-containing materials are known to improve the water repellency of many articles and resinoid-bonded grinding wheels are known to suffer degradation due to the effects of cooling water present during use. The silicon treatments of grain for resinoid wheels effectively "waterproofs" the resinoid-bonded abrasive articles to prevent strength degradation and to increase retention of grinding grade throughout the useful life of the resinoid-bonded abrasive article. Since vitrified-bonded abrasive bodies are inherently resistant to degradation from water, such treatments have not been performed. Moreover, since vitrified-bonded bodies are subjected to extremely high temperatures for forming, one would expect any organic silane present to be destroyed by the temperatures and thus not effect the performance of the 7 ~
resultant grinding wheel. With conventional fused aluminous grain, the expected destruction of the silane does occur, as is shown below.
Also, vitrified bonded wheels have previously been impregnated with molten sulfur, as a grinding aid. The molten sulfur is placed on the wheel after it has been fired and thus can not affect the individual alumina grains used to form the wheel.
Cottringer et al, U.S. Patent 4,623,364 describes the preparation of various ceramic bodies, including abrasive grits, by heating gels of alumina monohydrate seeded with crystalline alpha alumina or other materials capable of facilitating the conversion of alumina monohydrate to crystalline alpha alumina. Such seeded sol gel alumina abrasive grits are characterized by submicron sized alpha alumina crystals, high hardness, and a greater density than the sol gel abrasive grits produced by the Leitheiser et al teachings in U.S. Patent 4,518,397 which do not employ a seeding procedure.
Similarly, Schwabel, U.S. Patent 4,744,802, describes seeding or nucleating processes for producing dense, high hardness sol gel sintered alumina abrasive grits in which the nucleating agent is alpha ferric oxide.
For purposes of this application and the invention disclosed, the term "sol gel sintered alumina abrasive"
is intended to apply to abrasives produced by the teachings of any one of U.S. Patent No. 4,518,397, 4,623,364, and 4,744,802, as well as other sol gel techniques used in the art.
SUMMARY OF THE INVENTION
It has been found that treating the surfaces of aluminous sol gel abrasive grit particles, either alone or in combination with other abrasives, before the grit is B
- 2 a ~
formed into vitreous-bonded grinding body, with silica or a silica-generating material significantly improves the grinding performance of such bodies. The result is particularly unexpected since efforts to use the same treatments in the same manner with conventional fused aluminous abrasives, i.e. ones not prepared by a sol gel technique, yielded vitrified-bonded abrasive bodies showing no such improvement in grinding performance.
The phenomenon that has resulted in the improved grinding wheels is not fully understood, but is currently thought to be related to the increase in surface reactivity of the very fine crystals of sol gel sintered aluminous abrasives as compared to that of the much larger ultimate crystals of conventional fused alumina abrasives.
According to one broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond.
According to another broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond and wherein the sol gel sintered aluminous abrasive grit particles have a density of at least 95~ of theoretical density and include up to about 50~ by weight of an oxide selected from the group consisting of zirconia, titania, magnesia, ceria, spinel, hafnia, mullite, manganese dioxide, precursors of these oxides, and mixtures thereof.
According to another broad aspect, the invention relates to a bonded abrasive body comprised of sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and a vitrified bond and wherein the body consists essentially of about 30 to 60 volume ~ abrasive, about 3 to 40 volume ~ bond, and about 0 to 67 volume pores.
, ,~
'- ~0 ~ ~7~
According to a further broad aspect, the invention relates to a method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprise coating said particles with a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to convert the silicon compound to silica and to fix the silica to the surfaces and wherein the particles are coated with about 0.5 to about 3 weight percent of the silicon compound.
According to a further broad aspect, the invention relates to a method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprise coating said particles with a silica material and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix the silica to the surfaces and wherein the particles are coated with about 0.5 to about 3 weight percent of the silica.
According to another broad aspect, the invention relates to a method of improving the grinding performance of a vitrified-bonded sintered sol gel aluminous abrasive body which comprises coating individual sintered sol gel aluminous abrasive grit particles which are used to prepare the body with about 0.5 to about 3 weight percent of a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix a silica coating to the surfaces of the particles and to form silica-enriched surfaces.
DETAILED DESCRIPTION OF THE INVENTION
The vitrified bonded abrasive bodies of the present invention are comprised of sol gel aluminous grits, at least a portion of which have been treated with silica or a silica-generating material, and a vitreous bond.
The aluminous grits are prepared by a sol gel technique which entails crushing and firing a dried gel B
20 ~2 ~7~
prepared from a hydrated alumina such as microcrystalline boehmite, water, and an acid such as nitric acid. The initial sol may further include up to 10-15~ by weight of spinel, mullite, manganese dioxide, titania, magnesia, ceria, zirconia powder or a zirconia precursor which can be added in larger amounts, e.g. 40~ or more, or other compatible additives or precursors thereof. These additives are normally included to modify such properties as fracture toughness, hardness, friability, fracture mechanics, or drying behavior. In its most preferred embodiment, the sol or gel includes a dispersed submicron crystalline seed material or a precursor thereof in an amount effective to facilitate the conversion of the hydrated alumina particles 4b ,~
'-- 2 ~ 7 to alpha alumina upon sintering. Suitable such seeds are well known to the art. The amount of seed material should not exceed about 10 weight % of the hydrated alumina and there is normally no benefit to amounts in excess of about 5%. If the seed is adequately fine (preferably abut 60 m2 per gram or more), amounts of from about 0.5 to 10% may be used with about 1 to 5% being preferred. The seeds may also be added in the form of a precursor such as ferric nitrate solution. In general, the seed material should be isostructural with alpha alumina and have similar crystal lattice dimensions (within about 15%) and be present in the dried gel at the temperatures at which the conversion to alpha alumina occurs (about 1000 to llOOoC.). The preparation of suitable gels, both with and without seeds, is well known in the art as are the crushing and firing procedures and thus further details thereon are readily available in the literature and are not included here.
Each aluminous grit so prepared is made up essentially of numerous noncellular alpha alumina crystals having crystal sizes of less than about 10 microns, preferably less than about 1 micron. The abrasive has a density of at least about 95% of theoretical density.
The aluminous grits are then treated with silica or a silicon compound which will generate silica on the surfaces of the grits during the firing of an abrasive body made with the treated grits. Any silicon-containing compound which yields a silica-enriched surface on individual grit particles either before or after firing may be used in the present invention. Silicon compounds suitable for use herein include colloidal silica as well as organic silicon-containing compounds such as silanes, silicates, silicon ethers, silicon esters, and silicones.
The particular source of the silica-enriched surface has not been found to be critical, though different sources have been found to produce differences in grinding performance 1 ~3 ~ ~
and the best results to date have been observed when colloidal silica has been used ad the treating agent. The observed difference in performance may be due to the level of adherence of a particular silicon compound to the grit surfaces, or the extent of conversion of the silicon compound to silica under the particular firing conditions used, or the depth of the silica-enriched layer, or the degree of compression generated in the abrasive body by the presence of the silica.
Preferably, the silicon compound will be silica per se, e.g. fumed silica, colloidal silica or silica gel, or an organic silane, more preferably one having functional groups which will assist in producing a more uniform coating on individual sol gel aluminous grits. Examples of such functional groups include: amino, vinyl, acrylo, methacrylo, and mercapto. Silanes containing these functional groups are readily available from numerous commercial sources. The use of fumed silica is particularly advantageous whether alone or in a mixture with a silica-generating material such as a silane.
The treatment of the sol gel aluminous grits with the silicon compounds may be readily accomplished by uniformly blending the grits with the desired amount of the silicon compound with sufficient mixing to ensure uniformity. The treatment may be performed at any point in the manufacturing process before the grit and bond are formed into the desired abrasive body. Most conveniently, the silicon compound will be added to the grit with mixing as the first step in producing the abrasive body, followed by a precursor to the vitrified bond and any other desired ingredients. Alternatively, the grit can be pre-treated with the silicon compound by mixing them together and then storing the treated grit for subsequent use in forming an abrasive body. Since silicon compounds generally wet the surfaces of sol gel aluminous grit, nothing more than 2~232~i7 routine ~;x;ng has been found necessary with the specific silicon compounds elevated.
As indicated, the abrasive bodies of the present invention are comprised of aluminous grits, at least a portion of which have been treated as described, and a vitrified bond. The specific amounts of abrasive and bond used may vary widely. Suitable compositions can range from about 3 to 76% bond, about 24 to 62% abrasive, and about O
to 73% pores, all by volume. Preferably, the bodies will comprise about 3 to 39% bond, about 30 to 56% abrasive, and about O to 67~ pores. conventional pore inducing media such as hollow glass beads, solid glass beads, foamed glass particles, bubbled alumina, and the like may be incorporated into the present bodies thereby providing more latitude with respect to grade and the structure number variations.
The abrasive products of this invention are bonded with a vitrified bond. Any conventional vitrified bond composition may be used in the present invention, provided that it does not mature at a temperature so high that there is a detrimental interaction between the bond and the sol gel aluminous grit. Generally a bond requiring a relatively low firing temperature, i.e. below about llOOoC., will be used. Suitable vitrified bond compositions are commercially available from 0. Hommel Company of Pittsburg, PA, and others. The bond may include up to about 50~ by volume fillers or grinding aids, as is well known in the art.
Vitrified bonds, while amenable to the incorporation of fillers, somewhat limit the useful materials because of the high temperatures required to mature such bonds. Thus suitable fillers include such materials as kyanie, mullite, nepheline syenite, graphite, and molybdenum disulfide, depending upon the maturing temperature of a particular vitrified bond.
After firing at conventional conditions determined primarily by the actual bond used, the vitrified bonded body 2C~22 ~
".,, may be impregnated in a conventional manner with a grinding aid, such as molten sulfur, or with a vehicle, such as epoxy resin, to carry a grinding aid into the pores of the wheel.
In addition to fillers and grinding aids, the abrasive bodies may include one or more second abrasives in amounts of about 1 to 90% by volume of the total body. The second abrasive may act as a filler as, for example, if it is finer in grit size, or as an auxiliary or secondary abrasive, it is coarser. In some gr;n~;ng applications the second abrasive will function as a diluent for the coated sol gel aluminous abrasive grit. In other applications, the second abrasive may even enhance the overall grinding properties of the vitrified-bonded product, either in overall efficiency or in finish imparted to the material being ground. The second abrasive may be a fused alumina, cofused alumina-zirconia, sintered alumina-zirconia, silicon carbide, cubic boron nitride, diamond, flint, garnet, bubbled alumina, bubbled alumina-zirconia, and the like.
The treated sol gel abrasive grit and the vitrified bonded bodies containing said grits are, in general, superior to prior art untreated abrasives as the following examples show. The abrasive bodies are suitable for grinding all types of metal such as various steels like stainless steel, cast steel, hardened tool steel, cast irons, for example ductile iron, malleable iron, spheroidal graphite iron, chilled iron and modular iron, as well as metals like chromium, titanium, and aluminum. As is the case with all abrasives and the vitrified bonded bodies containing them, the abrasives and the bonded bodies of the invention will be more effective grinding some metals than others and will be more efficient in some grinding applications than in others. Outstanding portable, cut-off, precision, segment, track grinding, and tool sharpening wheels result when the abrasive utilized therein is the treated abrasive described herein.
2 ~ 7 In the following non-limiting examples, all parts and percents are by weight unless otherwise specified.
Also, the term "abrasive grit" is used herein to refer to individual particles of the abrasive material.
E~MPLE I
Sintered seeded sol gel alumina abrasive grits in ANSI size 54 were produced according to the teachings of commonly-owned U.S. Patent No. 4,623,364 and used to make test wheels according to the teachings of U.S. Patent No.
4,543,107. The procedures described therein were utilized except hat the abrasive grits were treated respectively with 1.5% by weight of specific silicon cont~;n;ng compounds, i.e. various silanes or colloidal silica, immediately prior to mixing with the vitreous bond.
Test wheels 5" (127 mm) in diameter by ~" (12.7 mm) thick with l~" (31.75 mm) hole were made for the grinding tests with each variation. After firing, the face of each wheel was reduced in width to ~" (6.345 mm) before testing. The manufacturing procedure for each wheel was as follows:
Wheel A (StAn~l~rd wheel) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 29 cc of water. While mixing continued, 12 g of dextrin followed by 119.7 g of bond F, the composition of which is given in Table I, and 20 additional grams of dextrin were added. After two minutes of ln;x;ng following the final dextrin addition, the mix was pressed into wheels. Each wheel as pressed weighed 367.9 g and had a pressed volume of 168.05 cc.
2~a~ J72 Wheel B (Y9576~ treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of phenylaminoalkyltrimethoxysilane obtained from Union Carbide Co., Tarrytown, NY, an Y9576~ organo-functional silane. While mixing continued, 14 cc of water, 12 g of dextrin, 119.7 g of bond F and an additional 20 g of dextrin were added. Mix time, pressed wheel weights and volumes were the same as for Wheel A.
Wheel C (A1102~treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighted into a mixing bowl and wetted with 15 g of an aminosilane obtained from Union Carbide as A1102~
organo-functional silane. While mixing continued, 14 cc of water, 12 g of dextrin, 119.7 g of bond F, and an additional 20 g of dextrin were added. Mix time, pressed wheel weights and volumes were the same as Wheel A.
Wheel D (Y9492~ treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of aminoalkyltrioxydisilane obtained from Union Carbide as Y9492~ amino-functional silane. With continued mixing 50 cc of water, 12 g of dextrin, 119.7 grams of bond F, and an additional 20 g of dextrin were added. After two minutes of ~;x;ng, the mix was pressed into wheels with each wheel weighing 378.8 g as pressed and having a pressed volume of 168.05 cc.
Wheel E (colloidal silica treat) 1000 grams of 54 grit seeded sol gel sintered alumina abrasive was weighed into a mixing bowl and wetted with 15 g of colloidal silica obtained from E.I. DuPont Co., Wilmington, DE, as Ludox AS-40~. While ~;xing continued, 14 - 2~22~72 cc water, 12 g destrin, 119.7 g bond F and an additional 20 g dextrin were added. After two minutes of mixing, the mix was pressed into wheels having pressed wheel weights and volumes as in Wheel A.
The composition of bond F, the vitreous bond used in all of the test wheels, is given in Table I. Because this bond is a fritted bond, its un-fired and fired compositions are the same.
TAB~B I
F~ED OXID~ CONPOSITION OF BOND F, % BY W~IGHT
SiO2 63.0 Al2O3 12.0 Fe203 0 . 1 CaO 1.1 MgO 0.1 Na2O 6.2 K2O 7.5 B203 10 . O
TOTAL 100.0 Wheels A through E were each air dried and fired to 900OC. in air for 43 hours and then soaked at that temperature for 16 hours before being allowed to cool to room temperature. After firing, the wheels were prepared for a slot grinding test by reducing the width of the face to ~" (6.35 mm).
A dry slot grinding test was made on D3 tool steel hardened to Rc60 with length of slot 16" (40.64 cm). Tests were made using a Brown and Sharpe surface grinder with wheel speed set to 6500 sfpm (33.02 smps) and table speed 2@~:2~7~
set to 50 fpm (0.254 mps). Tests were conducted at three downfeeds: 0.5, 1, and 1.5 mils per double pass (0.0127, O.0254, and 0.0381 mm) all to a total of 100 mils (2.54 mm) except 100.5 mils (2.667 mm) t 1.5 mils downfeed. Wheel wear, metal removal, and power were measured at each infeed rate. The test results are shown in Table II.
TABLB II
DRY 8LOT GRINDING RESU~T8 ON D3 8TEEL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hn~ (J3oules/-ln) mm ) A None 0.5 57.8 4.18 2.135.81 1.0 47.5 6.97 2.998.16 1.5 41.8 9.25 3.639.91 B Y9576~ 0.5 58.2 4.22 2.296.25 1.0 60.8 9.18 3.399.25 1.5 61.6 13.64 4.2311.55 C A1102~ 0.5 46.9 3.37 2.316.31 1.0 57.3 8.45 3.439.36 1.5 60.8 11.33 4.2511.60 D Y9492~ 0.5 55.0 4.22 2.155.87 1.0 60.8 9.19 2.968.08 1.5 88.4 19.58 3.6710.02 E Colloidal 0.5 50.9 3.65 2.296.25 Silica 1.0 82.6 12.23 2.968.08 1.5 107.123.85 3.649.93 G-ratio, (S/W), as a measure of the volume of metal removed per unit volume of wheel wear is one of the measures of a grinding wheel's performance since it determines the-total volume of metal removal before a wheel 2~22~7:~
must be replaced. Another, even more significant measure of a grinding wheel's utility is the Quality measure (S2/W) which takes into account not only the amount of metal that a wheel can remove but also the rapidity with which it does so. From the data in Table II, it is apparent that both G-ratio and Quality were markedly improved by all of the silica-generating wheel treatments tested. This is particularly true for the higher infeed rates which more nearly represent the condition of actual use of the wheels.
At the heaviest infeed, wheel W (treated with colloidal silica) showed a G-ratio 156% greater and a Quality 158%
greater than the untreated wheel A. Similarly, wheel D
(Y9492~ silane treated) showed a 111% greater G-ratio and a 112% greater Quality.
ExaMpL~ II
Wheels prepared as in Example I were further evaluated in grinding tests using a water-based coolant, E55~, from White & Bagley Company, Worcester, MA, diluted 1:40 with tap water. The tests were made on 4340 steel hardened to Rc55 with wheel speed set at 8500 SFPM (43.2 smps). Other test conditions were as in Example I, except that no 1.5 mil infeeds were made. The results of the wet grinding test are shown in Table III.
2~2~27~
TABLE III
~BT 8LOT GRINDING RE8~T8 ON 4340 8TEEL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) in~in) mm3) A None 0.5163.4 11.1 2.546.93 1.0 89.4 13.0 4.0311.00 B Y9576~ 0.5214.1 18.7 2.236.25 1.0119.4 18.4 4.5112.31 C A1102~ 0.5237.7 18.7 2.978.11 1.0 97.0 14.5 4.9113.40 D Y9492~ 0.5433.9 28.05 2.406.55 1.0199.0 31.84 3.549.66 E Colloidal 0.5360.4 18.65 2.316.31 Silica 1.0155.8 20.18 3.9610.81 Again, substantial improvement in grinding performance occurred with all of the treatments tested.
Wheels D and E again showed the best results. Wheel D at ~
mil downfeed showed a 166% improvement in G-ratio and a 145%
improvement in Quality. For the other treated wheels, improvements in G-ratio ranged from 31% for Wheel B to 121 for Wheel E while improvements in Quality ranged from llT
for Wheel C to 7OT for Wheel E.
EXAMPL~ III
A further series of test wheels was made using increasing amounts of silane Y9576~ which had been used at a level of 1.5% in Wheel B in Example I. Three additional test wheels F, G, and H were made using 0.5% 1.0%, and 2% of silane Y9576~ respectively. The manufacturing procedure was 2 ~v 2 ~
identical to that of Wheel B except that 5, 10, and 20 g, respectively, of the Y9576~ silane were used per 1000 grams of abrasive grits. Together with Wheel A (0%) and Wheel B
(1.5% Y9576~), Wheels F, G, and H comprise a series in which increasing amounts of the silane were evaluated. The same procedures of test grinding, i.e. dry on hardened D3 steel and wet on 4340 steel, were used as in Examples I and II.
The dry grinding results are shown in Table IV and the wet gri~; n~ results in Table V.
TABLB IV
DRY 8LOT GRINDING RBS~LTS ON D3 STEBL
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/-in min) mm3) A None 0.5 57.84.18 2.135.81 1.0 47.56.97 2.998.16 1.5 41.89.25 3.639.91 B 0.5% 0.5 50.43.60 2.386.50 Y9576~ 1.0 46.86.85 2.998.16 l.S 38.08.47 3.639.91 C 1.0% 0.5 S4.74.18 2.175.92 Y9S76~ 1.0 64.19.42 3.128.S2 l.S 48.710.89 3.8310.46 D l.S% 0.5 S8.24.22 2.296.25 Y9S76~ 1.0 60.89.18 3.399.25 l.S 61.613.64 4.23ll.S5 E 2.0% 0.5 48.13.61 2.206.01 Y9S76~
1.0 S4.08.06 3.2S8.87 l.S 7S.016.S8 4.2911.71 2~2~72 TABLE V
WBT 8LOT GRINDING RE8UBT~ ON 4 3 4 0 8TEEI.
Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/
in'min) -mm3) s A None 0.5163.4 11.1 2.546.93 1.089.4 13.0 4.0311.00 F 0.5% 0.5164.1 11.2 2.406.55 Y9576~ 1.097.6 14.7 3.7310.18 G 1.0% 0.5358.7 28.3 2.266.17 Y9576~ 1.0143.4 21.96 4.0411.02 B 1.5% 0.5214.1 18.7 2.236.25 Y9576~ 1.0119.4 18.44 4.5112.31 H 2.0% 0.5360.4 18.65 2.316.31 Y9576~ 1.0133.6 19.86 3.8810.59 The dry grinding results in Table IV for this particular silane treatment indicate that increasing its amount above 0.5% improved performance and 1.5% was nearly as effective as 2.%. The wet grinding results in Table V
were similar in that 0.5% Y9576~ had little effect. In this wet grinding test, it appears that 1.5% represents the optimum amount for this silane while both 1.0% and 2.0%
loadings gave very similar performance.
CONPARATIVI~ EILl~MPI.E A
The procedures of Examples I and II were repeated except that the sol gel aluminous grit was replaced by a fused alumina abrasive having a few relatively large crystals, i.e. about 50 to 100 microns, and of similar high purity to the sol gel grit. Grinding wheels J and K were 2~. 227 ~.
prepared as in Example I. Wheel J was like Wheel A in that it contained no silicon-treated grit and Wheel K was like Wheel B in that 1.5% phenylaminoalkyltrimethoxysilane obtained from Union Carbide as Y9576~ organo-functional silane was mixed into the grit prior to adding the other wheel forming ingredients.
The two wheels were evaluated on the same materials as in Examples I and II under both dry and wet gr; n~ i ng conditions. The dry grinding results are shown in Table A and the wet gr;n~;ng results in Table B.
Dry 81Ot Grindin~ Re~ults on D3 8te~1 Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (S2/W) ( 3/ (Joules/-in min) mm3) J None 0.5 11.6 0.81 2.73 7.45 l.0 13.9 1.95 4.24 11.57 1.5 14.1 2.97 4.93 13.45 K 1.5% 0.5 9.3 0.62 2.81 7.67 Y9576~ 1.0 11.4 1.56 4.13 11.27 1.5 13.0 2.73 5.02 13.70 2 ~ r ~ 2~ 2 ~ ~
TABLE B
Wet 81Ot Gr; n~; n~ Results on 4340 SteQl Wheel Abrasive Feed G-Ratio Quality Specific Power No. Treatment (mils) (S/W) (s2/w) (Hp/- (Joules/-i in) mm3) J None 0.5 68.1 4.90 3.60 9.82 1.0 46.1 6.61 4.80 13.09 K 1.5% 0.5 66.3 4.92 3.72 10.26 Y9576~ 1.0 42.0 6.12 5.04 13.75 As can be readily seen from the similarity of results between the untreated and silane treated samples in both Tables A and B, the silane treatment did not change the grinding performance of the fused alpha alumina abrasive grit.
It is to be understood that means of enriching the surface of sol gel aluminous abrasives with silica other than those directly cited will be apparent to those skilled in the art and that these other means are intended to be within the scope of this invention.
EXAMPLE IV
Wet Slot Grin~;n~ Results on 52100 Steel Two sets of wheels were prepared, each with the dimensions 5" x ~" x 7/~1l. Both sets used 80 grit seeded sol gel alumina and were prepared by the general t~chn;que described in Example I (Wheel A) except as indicated below.
The grits used in the two sets of wheels were prepared differently. One batch was untreated, while the other was treated with fumed silica by mixing together 1200 gm of the aluminous grits, 6 gm of deionized water, 23.4 gm 2~ 2272 of an animal glue-based aqueous binder and 4.92 gm of Cab-o-Sil fumed silica available from Cabot Corporation under the designation C8549. This gave an amount of silica in the wheel of about 0.41 weight %. Both batches were mixed with 174.96 gm of Bond F (From Example I) and dried and fired to form the wheels.
The wheels made from grits treated with fumed silica had similar physical characteristics to those from untreated grits except that they had a significantly lower sand blast penetration valve (3.08 as opposed to 3.63).
When evaluated on 52100 steel hardened to Rc 60-62 in a wet, external plunge grinding test, using 5% W.S. Oil as coolant, and a wheel speed of 8500 s.f.p.m., the results set forth on Table VI were obtained.
T~8LE VI
Wheel Feed G- MRR WWR Power Surface (in/sec)Ratio Hp/in Finish (Ra) Untreated 0.0010160.4 0.668 0.00417 2.2727 0.002296.4 1.432 0.0148S 3.3350 0.003342.2 2.149 0.05092 3.67106 Fumed 0.0010207.8 0.668 0.00232 2.0028 Silica Treated 0.0022103.5 1.476 0.01426 2.9343 0.003355.8 2.167 0.03881 3.0782 As can be seen from the above, the fumed silica treatment significantly improved the G-Ratio while consuming less power.
Claims (29)
1. A bonded abrasive body comprised of (i) sol gel sintered aluminous abrasive grit particles having silica-enriched surfaces and (ii) a vitrified bond.
2. The bonded abrasive body of Claim 1, wherein the sol gel sintered aluminous abrasive grit particles are seeded sol gel sintered aluminous abrasive grit particles.
3. The bonded abrasive body of Claim 1, wherein the sol gel sintered aluminous abrasive grit particles have a density of at least 95% of theoretical density and include up to about 50% by weight of an oxide selected from the group consisting of zirconia, titania, magnesia, ceria, spinel, hafnia, mullite, manganese dioxide, precursors of these oxides, and mixtures thereof.
4. The bonded abrasive body of Claim 1, wherein the body consists essentially of about 24 to 62 volume %
abrasive, about 3 to 76 volume % bond, and about 0 to 73 volume % pores.
abrasive, about 3 to 76 volume % bond, and about 0 to 73 volume % pores.
5. The bonded abrasive body of Claim 1, wherein the body consists essentially of about 30 to 60 volume %
abrasive, about 3 to 40 volume % bond, and about 0 to 67 volume % pores.
abrasive, about 3 to 40 volume % bond, and about 0 to 67 volume % pores.
6. The bonded abrasive body of Claim 1, wherein said body further includes about 2 to about 90 volume percent of a second abrasive selected from the group consisting essentially of fused alumina, cofused alumina-zirconia, sintered alumina-zirconia, silicon carbide, cubic boron nitride, diamond, flint, garnet, bubbled alumina, bubbled alumina-zirconia, and mixtures thereof.
7. The bonded abrasive body of Claim 1, wherein the vitrified bond includes up to about 30 volume % of a filler.
8. The bonded abrasive body of Claim 7, wherein the filler is selected from the group consisting essentially of kyanite, mullite, nepheline syenite, graphite, molybdenum disulfide, and mixtures thereof.
9. The bonded abrasive body of Claim 1, wherein the body is a tool sharpening wheel.
10. The bonded abrasive body of Claim 1, wherein the body is a precision grinding wheel.
11. The bonded abrasive body of Claim 1, wherein the body is a creep feed wheel.
12. The bonded abrasive body of Claim 1, wherein the body is a cut-off wheel.
13. The bonded abrasive body of Claim 1, wherein the body is a portable wheel.
14. A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to convert the silicon compound to silica and to fix the silica to the surfaces.
15. The method of Claim 14, wherein the silicon compound is an organic silicon-containing compound selected from the group consisting essentially of silanes, silicates, silicon ethers, silicon esters, and silicones.
16. The method of Claim 14, wherein the particles are coated with about 0.5 to about 3 weight percent of the silicon compound.
17. The method of Claim 14, wherein the silicon compound contains at least one functional group selected from the group consisting of amino, vinyl, acrylo, methacrylo, and mercapto functional groups.
18. A method of producing sintered sol gel aluminous abrasive particles having silica-enriched surfaces which comprises coating said particles with a silica material and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix the silica to the surfaces.
19. The method of Claim 18, wherein the silica is selected from the group consisting of colloidal silica and silica gel.
20. The method of Claim 18, wherein the particles are coated with abut 0.5 to about 3 weight percent of the silica.
21. A method of improving the grinding performance of a vitrified-bonded sintered sol gel aluminous abrasive body which comprises coating individual sintered sol gel aluminous abrasive grit particles which are used to prepare the body with about 0.5 to about 3 weight percent of a silicon compound and heat-treating the coated particles at a sufficient temperature and for a sufficient time to fix a silica coating to the surfaces of the particles and to form silica-enriched surfaces.
22 22. The method of Claim 21, wherein the silicon compound is selected from the group consisting essentially of colloidal silica and silica gel.
23. The method of Claim 21, wherein the silicon compound is selected from the group consisting essentially of silanes, silicates, silicon ethers, silicon esters, and silicones.
24. The method of Claim 21, wherein the silicon compound is a silane.
25. The method of Claim 24, wherein the silane contains one or more functional groups which assist in producing a uniform coating on individual sol gel aluminous grits.
26. The method of Claim 25, wherein the functional group is selected from the group consisting essentially of amino, vinyl, acrylo, methacrylo, and mercapto functional groups.
27. The method of Claim 24, wherein the silane is an amino silane.
28. The method of Claim 27, wherein the amino silane is aminoalkyltrioxydisilane.
29. The method of Claim 21, wherein the sol gel sintered aluminous abrasive grit particles are seeded sol gel sintered aluminous abrasive grit particles.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US405,263 | 1982-08-04 | ||
| US07/405,263 US4997461A (en) | 1989-09-11 | 1989-09-11 | Nitrified bonded sol gel sintered aluminous abrasive bodies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2022272A1 CA2022272A1 (en) | 1991-03-12 |
| CA2022272C true CA2022272C (en) | 1999-02-02 |
Family
ID=23602958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002022272A Expired - Fee Related CA2022272C (en) | 1989-09-11 | 1990-07-30 | Vitrified bonded sol gel sintered aluminous abrasive bodies |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4997461A (en) |
| EP (1) | EP0417729B1 (en) |
| JP (1) | JP2509379B2 (en) |
| KR (1) | KR0168657B1 (en) |
| AR (1) | AR247755A1 (en) |
| AT (1) | ATE156741T1 (en) |
| AU (1) | AU624984B2 (en) |
| BR (1) | BR9004483A (en) |
| CA (1) | CA2022272C (en) |
| DD (1) | DD297595A5 (en) |
| DE (1) | DE69031256T2 (en) |
| DK (1) | DK0417729T3 (en) |
| MX (1) | MX166945B (en) |
| ZA (1) | ZA906193B (en) |
Families Citing this family (300)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT394963B (en) * | 1989-04-14 | 1992-08-10 | Treibacher Chemische Werke Ag | CERAMIC, SINTERED BODIES |
| US5076815A (en) * | 1989-07-07 | 1991-12-31 | Lonza Ltd. | Process for producing sintered material based on aluminum oxide and titanium oxide |
| US5110322A (en) * | 1989-09-13 | 1992-05-05 | Norton Company | Abrasive article |
| US5094672A (en) * | 1990-01-16 | 1992-03-10 | Cincinnati Milacron Inc. | Vitreous bonded sol-gel abrasive grit article |
| US6123743A (en) * | 1991-01-07 | 2000-09-26 | Norton Company | Glass-ceramic bonded abrasive tools |
| AU646120B2 (en) * | 1991-01-07 | 1994-02-10 | Norton Company | Glass ceramic bonded abrasive articles |
| US5131926A (en) * | 1991-03-15 | 1992-07-21 | Norton Company | Vitrified bonded finely milled sol gel aluminous bodies |
| CA2068124A1 (en) * | 1991-05-24 | 1992-11-25 | Daniel J. Halloran | Optically clear hair care compositions containing amino-functional silicone microemulsions |
| US5437754A (en) * | 1992-01-13 | 1995-08-01 | Minnesota Mining And Manufacturing Company | Abrasive article having precise lateral spacing between abrasive composite members |
| US5178644A (en) * | 1992-01-23 | 1993-01-12 | Cincinnati Milacron Inc. | Method for making vitreous bonded abrasive article and article made by the method |
| US5203882A (en) * | 1992-01-27 | 1993-04-20 | Norton Company | Bonding adjuvants for vitreous bond formulations and process for bonding with |
| AU650382B2 (en) * | 1992-02-05 | 1994-06-16 | Norton Company | Nano-sized alpha alumina particles |
| US6258137B1 (en) | 1992-02-05 | 2001-07-10 | Saint-Gobain Industrial Ceramics, Inc. | CMP products |
| US5215552A (en) * | 1992-02-26 | 1993-06-01 | Norton Company | Sol-gel alumina abrasive grain |
| US5282875A (en) * | 1992-03-18 | 1994-02-01 | Cincinnati Milacron Inc. | High density sol-gel alumina-based abrasive vitreous bonded grinding wheel |
| RU95105160A (en) * | 1992-07-23 | 1997-01-10 | Миннесота Майнинг энд Мануфакчуринг Компани (US) | Method of preparing abrasive particles, abrasive articles and articles with abrasive coating |
| BR9306765A (en) | 1992-07-23 | 1998-12-08 | Minnesota Mining & Mfg | Process for the preparation of an abrasive particle and abrasive article |
| US5366523A (en) * | 1992-07-23 | 1994-11-22 | Minnesota Mining And Manufacturing Company | Abrasive article containing shaped abrasive particles |
| US5201916A (en) * | 1992-07-23 | 1993-04-13 | Minnesota Mining And Manufacturing Company | Shaped abrasive particles and method of making same |
| CA2139313A1 (en) * | 1992-07-28 | 1994-02-03 | Ahmet Celikkaya | Abrasive grain with metal oxide coating, method of making same and abrasive products |
| US5213591A (en) * | 1992-07-28 | 1993-05-25 | Ahmet Celikkaya | Abrasive grain, method of making same and abrasive products |
| BR9307112A (en) * | 1992-09-25 | 1999-03-30 | Minnesota Mining & Mfg | Process for preparing abrasive grain material abrasive grain and abrasive article |
| CA2142466A1 (en) * | 1992-09-25 | 1994-04-14 | Henry A. Larmie | Abrasive grain including rare earth oxide therin |
| JPH08502305A (en) * | 1992-09-25 | 1996-03-12 | ミネソタ・マイニング・アンド・マニュファクチュアリング・カンパニー | Method for producing abrasive grains containing alumina and ceria |
| CA2102656A1 (en) * | 1992-12-14 | 1994-06-15 | Dwight D. Erickson | Abrasive grain comprising calcium oxide and/or strontium oxide |
| US5690707A (en) * | 1992-12-23 | 1997-11-25 | Minnesota Mining & Manufacturing Company | Abrasive grain comprising manganese oxide |
| CA2115889A1 (en) * | 1993-03-18 | 1994-09-19 | David E. Broberg | Coated abrasive article having diluent particles and shaped abrasive particles |
| JP2719878B2 (en) * | 1993-05-26 | 1998-02-25 | 株式会社ノリタケカンパニーリミテド | Vitrified whetstone |
| EP0700326A1 (en) * | 1993-05-26 | 1996-03-13 | Minnesota Mining And Manufacturing Company | Method of providing a smooth surface on a substrate |
| US5549962A (en) * | 1993-06-30 | 1996-08-27 | Minnesota Mining And Manufacturing Company | Precisely shaped particles and method of making the same |
| AU679968B2 (en) * | 1993-09-13 | 1997-07-17 | Minnesota Mining And Manufacturing Company | Abrasive article, method of manufacture of same, method of using same for finishing, and a production tool |
| US5658184A (en) * | 1993-09-13 | 1997-08-19 | Minnesota Mining And Manufacturing Company | Nail tool and method of using same to file, polish and/or buff a fingernail or a toenail |
| US5632668A (en) * | 1993-10-29 | 1997-05-27 | Minnesota Mining And Manufacturing Company | Method for the polishing and finishing of optical lenses |
| DE69511068T2 (en) * | 1994-02-22 | 2000-04-06 | Minnesota Mining & Mfg | ABRASIVE ARTICLE, METHOD FOR PRODUCING THE SAME, AND METHOD FOR APPLYING THE SAME IN FINISHING |
| US5536282A (en) * | 1994-11-08 | 1996-07-16 | Cincinnati Milacron Inc. | Method for producing an improved vitreous bonded abrasive article and the article produced thereby |
| NL9500302A (en) * | 1995-02-17 | 1996-10-01 | Hoogovens Staal Bv | Method for removing at least a coating from metal scrap parts coated with a coating. |
| US5679067A (en) | 1995-04-28 | 1997-10-21 | Minnesota Mining And Manufacturing Company | Molded abrasive brush |
| EP0822883B1 (en) * | 1995-04-28 | 2000-08-09 | Minnesota Mining And Manufacturing Company | Abrasive article having a bond system comprising a polysiloxane |
| US5611829A (en) * | 1995-06-20 | 1997-03-18 | Minnesota Mining And Manufacturing Company | Alpha alumina-based abrasive grain containing silica and iron oxide |
| AU708470B2 (en) * | 1995-06-20 | 1999-08-05 | Minnesota Mining And Manufacturing Company | Alpha alumina-based abrasive grain containing silica and iron oxide |
| US5645619A (en) * | 1995-06-20 | 1997-07-08 | Minnesota Mining And Manufacturing Company | Method of making alpha alumina-based abrasive grain containing silica and iron oxide |
| US5958794A (en) * | 1995-09-22 | 1999-09-28 | Minnesota Mining And Manufacturing Company | Method of modifying an exposed surface of a semiconductor wafer |
| US5903951A (en) * | 1995-11-16 | 1999-05-18 | Minnesota Mining And Manufacturing Company | Molded brush segment |
| US5641330A (en) * | 1995-11-28 | 1997-06-24 | Minnesota Mining And Manufacturing Company | Method of making alumina abrasive grain having a metal nitride coating thereon |
| US5628806A (en) * | 1995-11-22 | 1997-05-13 | Minnesota Mining And Manufacturing Company | Method of making alumina abrasive grain having a metal carbide coating thereon |
| US5611828A (en) * | 1995-11-28 | 1997-03-18 | Minnesota Mining And Manufacturing Company | Method of making alumina abrasive grain having a metal boride coating thereon |
| US5669941A (en) * | 1996-01-05 | 1997-09-23 | Minnesota Mining And Manufacturing Company | Coated abrasive article |
| GB2310864B (en) * | 1996-03-07 | 1999-05-19 | Minnesota Mining & Mfg | Coated abrasives and backing therefor |
| US5700302A (en) * | 1996-03-15 | 1997-12-23 | Minnesota Mining And Manufacturing Company | Radiation curable abrasive article with tie coat and method |
| US5728184A (en) * | 1996-06-26 | 1998-03-17 | Minnesota Mining And Manufacturing Company | Method for making ceramic materials from boehmite |
| US6475253B2 (en) | 1996-09-11 | 2002-11-05 | 3M Innovative Properties Company | Abrasive article and method of making |
| US5776214A (en) * | 1996-09-18 | 1998-07-07 | Minnesota Mining And Manufacturing Company | Method for making abrasive grain and abrasive articles |
| US5893935A (en) * | 1997-01-09 | 1999-04-13 | Minnesota Mining And Manufacturing Company | Method for making abrasive grain using impregnation, and abrasive articles |
| US5779743A (en) * | 1996-09-18 | 1998-07-14 | Minnesota Mining And Manufacturing Company | Method for making abrasive grain and abrasive articles |
| US6206942B1 (en) | 1997-01-09 | 2001-03-27 | Minnesota Mining & Manufacturing Company | Method for making abrasive grain using impregnation, and abrasive articles |
| BR9712188A (en) * | 1996-10-01 | 2000-01-25 | Hubert Francois | Composite wear part. |
| US5711774A (en) * | 1996-10-09 | 1998-01-27 | Norton Company | Silicon carbide abrasive wheel |
| US6524681B1 (en) | 1997-04-08 | 2003-02-25 | 3M Innovative Properties Company | Patterned surface friction materials, clutch plate members and methods of making and using same |
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| US5983434A (en) * | 1997-07-15 | 1999-11-16 | Minnesota Mining And Manufacturing Company | Rotary bristle tool with preferentially oriented bristles |
| US6024824A (en) * | 1997-07-17 | 2000-02-15 | 3M Innovative Properties Company | Method of making articles in sheet form, particularly abrasive articles |
| US5876470A (en) * | 1997-08-01 | 1999-03-02 | Minnesota Mining And Manufacturing Company | Abrasive articles comprising a blend of abrasive particles |
| US5928394A (en) * | 1997-10-30 | 1999-07-27 | Minnesota Mining And Manufacturing Company | Durable abrasive articles with thick abrasive coatings |
| US5863308A (en) * | 1997-10-31 | 1999-01-26 | Norton Company | Low temperature bond for abrasive tools |
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| US6066189A (en) * | 1998-12-17 | 2000-05-23 | Norton Company | Abrasive article bonded using a hybrid bond |
| KR100615691B1 (en) * | 1998-12-18 | 2006-08-25 | 도소 가부시키가이샤 | A member for polishing, surface plate for polishing and polishing method using the same |
| US6179887B1 (en) | 1999-02-17 | 2001-01-30 | 3M Innovative Properties Company | Method for making an abrasive article and abrasive articles thereof |
| DE60015936T2 (en) * | 1999-03-03 | 2005-12-22 | Lilly Industries, Inc., Indianapolis | ABRASIVE COATINGS |
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| US6110241A (en) * | 1999-08-06 | 2000-08-29 | Saint-Gobain Industrial Ceramics, Inc. | Abrasive grain with improved projectability |
| AU748745B2 (en) * | 1999-08-20 | 2002-06-13 | Saint-Gobain Ceramics And Plastics, Inc. | Sol-gel alumina abrasive grain |
| US6258141B1 (en) * | 1999-08-20 | 2001-07-10 | Saint-Gobain Industrial Ceramics, Inc. | Sol-gel alumina abrasive grain |
| US6685539B1 (en) * | 1999-08-24 | 2004-02-03 | Ricoh Company, Ltd. | Processing tool, method of producing tool, processing method and processing apparatus |
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| ATE331697T1 (en) | 2000-07-19 | 2006-07-15 | 3M Innovative Properties Co | MELTED ALUMINUM OXICARBIDE/NITRIDE-ALUMINUM RARE EARTH EARTH EUTECTIC MATERIALS, ABRASIVE PARTICLES, ABRASIVE ARTICLES AND METHODS FOR THE PRODUCTION AND USE OF THE SAME |
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| AU2002211508A1 (en) * | 2000-10-16 | 2002-04-29 | 3M Innovative Properties Company | Method of making an agglomerate particles |
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| RU2004103084A (en) * | 2001-08-02 | 2005-06-27 | 3М Инновейтив Пропертиз Компани (US) | MATERIALS BASED ON AL2O3, RARE EARTH OXIDES, ZRO2 AND (OR) HFO2 AND METHODS FOR PRODUCING AND USING THEREOF |
| CN101538121B (en) * | 2001-08-02 | 2012-09-05 | 3M创新有限公司 | Method for preparing article from glasses and glass ceramic product prepared therefor |
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| WO2003016424A1 (en) * | 2001-08-20 | 2003-02-27 | Samsung Corning Co., Ltd. | Polishing slurry comprising silica-coated ceria |
| US6609963B2 (en) * | 2001-08-21 | 2003-08-26 | Saint-Gobain Abrasives, Inc. | Vitrified superabrasive tool and method of manufacture |
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| US6572666B1 (en) | 2001-09-28 | 2003-06-03 | 3M Innovative Properties Company | Abrasive articles and methods of making the same |
| US6843944B2 (en) * | 2001-11-01 | 2005-01-18 | 3M Innovative Properties Company | Apparatus and method for capping wide web reclosable fasteners |
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| JP4222944B2 (en) * | 2001-12-04 | 2009-02-12 | マゴット アンテルナショナル エス．アー． | Casting parts with enhanced wear resistance |
| US6613113B2 (en) | 2001-12-28 | 2003-09-02 | 3M Innovative Properties Company | Abrasive product and method of making the same |
| US6846232B2 (en) * | 2001-12-28 | 2005-01-25 | 3M Innovative Properties Company | Backing and abrasive product made with the backing and method of making and using the backing and abrasive product |
| US6949128B2 (en) * | 2001-12-28 | 2005-09-27 | 3M Innovative Properties Company | Method of making an abrasive product |
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| JP2010502466A (en) * | 2006-09-11 | 2010-01-28 | スリーエム イノベイティブ プロパティズ カンパニー | Abrasive article having a mechanical fastener |
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| EP2115028B1 (en) | 2007-02-26 | 2015-01-28 | Hexion Specialty Chemicals Research Belgium S.A. | Resin-polyester blend binder compositions, method of making same and articles made therefrom |
| RU2009134876A (en) * | 2007-03-21 | 2011-04-27 | 3М Инновейтив Пропертиз Компани (3M Innovative Properties Company) (US) | WAYS TO REMOVE SURFACE DEFECTS |
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| WO2009046293A1 (en) * | 2007-10-05 | 2009-04-09 | Saint-Gobain Ceramics & Plastics, Inc. | Improved silicon carbide particles, methods of fabrication, and methods using same |
| CN101821353A (en) * | 2007-10-05 | 2010-09-01 | 圣戈本陶瓷及塑料股份有限公司 | Polishing of sapphire with composite slurries |
| US8123828B2 (en) * | 2007-12-27 | 2012-02-28 | 3M Innovative Properties Company | Method of making abrasive shards, shaped abrasive particles with an opening, or dish-shaped abrasive particles |
| BRPI0821437B1 (en) * | 2007-12-27 | 2019-01-22 | 3M Innovative Properties Co | method of manufacturing a plurality of abrasive shards and abrasive article |
| US7959695B2 (en) * | 2008-03-21 | 2011-06-14 | Saint-Gobain Ceramics & Plastics, Inc. | Fixed abrasive articles utilizing coated abrasive particles |
| FR2928916B1 (en) | 2008-03-21 | 2011-11-18 | Saint Gobain Ct Recherches | FADE AND COATED GRAINS |
| US8524190B2 (en) | 2008-05-30 | 2013-09-03 | Skyworks Solutions, Inc. | Enhanced hexagonal ferrite material and methods of preparation and use thereof |
| MY150551A (en) * | 2008-07-03 | 2014-01-30 | 3M Innovative Properties Co | Fixed abrasive particles and articles made therefrom |
| DE102008039459B4 (en) * | 2008-08-25 | 2014-06-26 | Center For Abrasives And Refractories Research & Development C.A.R.R.D. Gmbh | Coated solid particles |
| WO2010047723A1 (en) * | 2008-10-20 | 2010-04-29 | Skyworks Solutions, Inc. | Magnetic-dielectric assemblies and methods of fabrication |
| US8764865B2 (en) | 2008-12-17 | 2014-07-01 | 3M Innovative Properties Company | Shaped abrasive particles with grooves |
| US8142531B2 (en) | 2008-12-17 | 2012-03-27 | 3M Innovative Properties Company | Shaped abrasive particles with a sloping sidewall |
| US8142891B2 (en) * | 2008-12-17 | 2012-03-27 | 3M Innovative Properties Company | Dish-shaped abrasive particles with a recessed surface |
| US10137556B2 (en) | 2009-06-22 | 2018-11-27 | 3M Innovative Properties Company | Shaped abrasive particles with low roundness factor |
| US8142532B2 (en) * | 2008-12-17 | 2012-03-27 | 3M Innovative Properties Company | Shaped abrasive particles with an opening |
| WO2010121001A1 (en) * | 2009-04-17 | 2010-10-21 | 3M Innovative Properties Company | Planar abrasive articles made using transfer articles and method of making the same |
| USD610430S1 (en) | 2009-06-18 | 2010-02-23 | 3M Innovative Properties Company | Stem for a power tool attachment |
| CN102548714B (en) * | 2009-08-03 | 2015-04-29 | 圣戈班磨料磨具有限公司 | Abrasive tool having a particular porosity variation |
| WO2011044507A2 (en) | 2009-10-08 | 2011-04-14 | Saint-Gobain Abrasives, Inc. | Bonded abrasive article and method of forming |
| RU2517275C2 (en) * | 2009-12-02 | 2014-05-27 | Сэнт-Гобэн Эбрейзивс, Инк. | Abrasive article (versions) and method of its forming |
| RU2520288C2 (en) * | 2009-12-02 | 2014-06-20 | Сэнт-Гобэн Эбрейзивс, Инк. | Abrasive article (versions) and method of its forming |
| WO2011068742A1 (en) | 2009-12-03 | 2011-06-09 | 3M Innovative Properties Company | Method of inhibiting water adsorption of powder by addition of hydrophobic nanoparticles |
| BR112012013350A2 (en) | 2009-12-03 | 2017-12-12 | 3M Innovative Properties Co | electrostatic deposition method of particles, abrasive grains and articles |
| US8480772B2 (en) | 2009-12-22 | 2013-07-09 | 3M Innovative Properties Company | Transfer assisted screen printing method of making shaped abrasive particles and the resulting shaped abrasive particles |
| US9180573B2 (en) | 2010-03-03 | 2015-11-10 | 3M Innovative Properties Company | Bonded abrasive wheel |
| US9573250B2 (en) | 2010-04-27 | 2017-02-21 | 3M Innovative Properties Company | Ceramic shaped abrasive particles, methods of making the same, and abrasive articles containing the same |
| WO2012018903A2 (en) | 2010-08-04 | 2012-02-09 | 3M Innovative Properties Company | Intersecting plate shaped abrasive particles |
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| CN103370174B (en) | 2010-12-31 | 2017-03-29 | 圣戈本陶瓷及塑料股份有限公司 | The forming method of the abrasive grains with given shape and such particle |
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| WO2013003830A2 (en) | 2011-06-30 | 2013-01-03 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive articles including abrasive particles of silicon nitride |
| US8840694B2 (en) | 2011-06-30 | 2014-09-23 | Saint-Gobain Ceramics & Plastics, Inc. | Liquid phase sintered silicon carbide abrasive particles |
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| EP2567784B1 (en) | 2011-09-08 | 2019-07-31 | 3M Innovative Properties Co. | Bonded abrasive article |
| KR101951506B1 (en) | 2011-09-07 | 2019-02-22 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Method of abrading a workpiece |
| CN103781595B (en) | 2011-09-07 | 2019-08-27 | 3M创新有限公司 | Bonded abrasive article |
| JP5802336B2 (en) | 2011-09-26 | 2015-10-28 | サン−ゴバン セラミックス アンド プラスティクス，インコーポレイティド | Abrasive product comprising abrasive particle material, abrasive cloth paper using the abrasive particle material, and forming method |
| KR101951978B1 (en) | 2011-11-09 | 2019-02-25 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Composite abrasive wheel |
| CN103132172B (en) | 2011-11-29 | 2015-07-22 | 杜邦兴达（无锡）单丝有限公司 | Abrasive silk with improved rigidity, industrial brush with the same and purpose of industrial brush |
| CA2862453A1 (en) | 2011-12-30 | 2013-07-04 | Saint-Gobain Ceramics & Plastics, Inc. | Forming shaped abrasive particles |
| JP6033886B2 (en) | 2011-12-30 | 2016-11-30 | サン−ゴバン セラミックス アンド プラスティクス，インコーポレイティド | Shaped abrasive particles and method for forming the same |
| KR101681526B1 (en) | 2011-12-30 | 2016-12-01 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | Composite shaped abrasive particles and method of forming same |
| BR112014017050B1 (en) | 2012-01-10 | 2021-05-11 | Saint-Gobain Ceramics & Plastics, Inc. | molded abrasive particle |
| US8840696B2 (en) | 2012-01-10 | 2014-09-23 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive particles having particular shapes and methods of forming such particles |
| WO2013149209A1 (en) | 2012-03-30 | 2013-10-03 | Saint-Gobain Abrasives, Inc. | Abrasive products having fibrillated fibers |
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| US9200187B2 (en) | 2012-05-23 | 2015-12-01 | Saint-Gobain Ceramics & Plastics, Inc. | Shaped abrasive particles and methods of forming same |
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| JP6550335B2 (en) | 2012-10-31 | 2019-07-24 | スリーエム イノベイティブ プロパティズ カンパニー | Shaped abrasive particles, method of making the same, and abrasive articles comprising the same |
| EP2938459B1 (en) | 2012-12-31 | 2021-06-16 | Saint-Gobain Ceramics & Plastics, Inc. | Particulate materials and methods of forming same |
| CN103087676B (en) * | 2013-01-29 | 2014-07-30 | 淄博理研泰山涂附磨具有限公司 | Sintering method of abrasion resisting abrasive particles |
| KR102313225B1 (en) | 2013-03-12 | 2021-10-18 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Bonded abrasive article |
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| AU2014324453B2 (en) | 2013-09-30 | 2017-08-03 | Saint-Gobain Ceramics & Plastics, Inc. | Shaped abrasive particles and methods of forming same |
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Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2507200A (en) * | 1945-02-10 | 1950-05-09 | Gen Electric | Process for rendering materials water-repellent and compositions therefor |
| US2878111A (en) * | 1954-09-21 | 1959-03-17 | Union Carbide Corp | Water-resistant abrasive structures |
| US2881064A (en) * | 1955-11-07 | 1959-04-07 | Minnesota Mining & Mfg | Fill-resistant abrasive articles |
| US3029160A (en) * | 1957-10-21 | 1962-04-10 | Carborundum Co | Manufacture of abrasive coated products |
| GB896910A (en) * | 1958-02-21 | 1962-05-23 | Carborundum Co | Bonded abrasive articles |
| US3041156A (en) * | 1959-07-22 | 1962-06-26 | Norton Co | Phenolic resin bonded grinding wheels |
| US3416905A (en) * | 1965-06-25 | 1968-12-17 | Lexington Lab Inc | Process for manufacture of porous abrasive articles |
| US3423195A (en) * | 1966-05-16 | 1969-01-21 | American Abrasive Co | Method of treating alumina abrasive grains with iron nitrate and products made thereby |
| US3489541A (en) * | 1966-05-16 | 1970-01-13 | American Abrasive Corp | Method of treating abrasive grains and products made thereby |
| US3525600A (en) * | 1966-10-29 | 1970-08-25 | Nippon Toki Kk | Abrasive grains coated with a ceramic and a silicone resin |
| JPS5146490A (en) * | 1974-10-18 | 1976-04-20 | Matsushita Electric Ind Co Ltd | KENMAZAI |
| US4184853A (en) * | 1976-04-21 | 1980-01-22 | Andropov Jury I | Individual abrasive grains with a silicon-base alloy coating |
| US4314827A (en) * | 1979-06-29 | 1982-02-09 | Minnesota Mining And Manufacturing Company | Non-fused aluminum oxide-based abrasive mineral |
| ZA803883B (en) * | 1979-06-29 | 1981-07-29 | Minnesota Mining & Mfg | Non-fused aluminum oxide-based abrasive mineral |
| US4543107A (en) * | 1984-08-08 | 1985-09-24 | Norton Company | Vitrified bonded grinding wheels containing sintered gel aluminous abrasive grits |
| MX204007A (en) * | 1984-01-19 | 1994-03-31 | Norton Co | CERAMIC BODIES AND THEIR PREPARATION |
| US4623364A (en) * | 1984-03-23 | 1986-11-18 | Norton Company | Abrasive material and method for preparing the same |
| US4574003A (en) * | 1984-05-03 | 1986-03-04 | Minnesota Mining And Manufacturing Co. | Process for improved densification of sol-gel produced alumina-based ceramics |
| CA1254238A (en) * | 1985-04-30 | 1989-05-16 | Alvin P. Gerk | Process for durable sol-gel produced alumina-based ceramics, abrasive grain and abrasive products |
| JPS62292365A (en) * | 1986-06-11 | 1987-12-19 | Mizuho Kenma Toishi Kk | Ceramic carbide abrasive grain grindstone and its process |
| JPS62297070A (en) * | 1986-06-16 | 1987-12-24 | Mizuho Kenma Toishi Kk | Ceramic superhard grinding grain grindstone and manufacture thereof |
| JPS6345118A (en) * | 1986-08-12 | 1988-02-26 | Showa Denko Kk | Production of sintered abrasive alumina grain |
| AU604899B2 (en) * | 1987-05-27 | 1991-01-03 | Minnesota Mining And Manufacturing Company | Abrasive grits formed of ceramic, impregnation method of making the same and products made therewith |
-
1989
- 1989-09-11 US US07/405,263 patent/US4997461A/en not_active Expired - Lifetime
-
1990
- 1990-07-30 CA CA002022272A patent/CA2022272C/en not_active Expired - Fee Related
- 1990-08-03 AU AU60138/90A patent/AU624984B2/en not_active Ceased
- 1990-08-06 ZA ZA906193A patent/ZA906193B/en unknown
- 1990-09-07 AR AR90317787A patent/AR247755A1/en active
- 1990-09-10 JP JP2237272A patent/JP2509379B2/en not_active Expired - Fee Related
- 1990-09-10 KR KR1019900014244A patent/KR0168657B1/en not_active IP Right Cessation
- 1990-09-10 BR BR909004483A patent/BR9004483A/en not_active IP Right Cessation
- 1990-09-10 DD DD90343933A patent/DD297595A5/en unknown
- 1990-09-11 AT AT90117481T patent/ATE156741T1/en not_active IP Right Cessation
- 1990-09-11 MX MX022333A patent/MX166945B/en unknown
- 1990-09-11 DE DE69031256T patent/DE69031256T2/en not_active Expired - Fee Related
- 1990-09-11 DK DK90117481.3T patent/DK0417729T3/en active
- 1990-09-11 EP EP90117481A patent/EP0417729B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03205475A (en) | 1991-09-06 |
| DE69031256D1 (en) | 1997-09-18 |
| BR9004483A (en) | 1991-09-10 |
| JP2509379B2 (en) | 1996-06-19 |
| US4997461A (en) | 1991-03-05 |
| EP0417729B1 (en) | 1997-08-13 |
| DE69031256T2 (en) | 1998-03-05 |
| EP0417729A2 (en) | 1991-03-20 |
| EP0417729A3 (en) | 1991-08-28 |
| ATE156741T1 (en) | 1997-08-15 |
| CA2022272A1 (en) | 1991-03-12 |
| AU624984B2 (en) | 1992-06-25 |
| AR247755A1 (en) | 1995-03-31 |
| MX166945B (en) | 1993-02-15 |
| DD297595A5 (en) | 1992-01-16 |
| ZA906193B (en) | 1991-06-26 |
| AU6013890A (en) | 1991-03-14 |
| DK0417729T3 (en) | 1998-03-30 |
| KR910006451A (en) | 1991-04-29 |
| KR0168657B1 (en) | 1999-01-15 |
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| EEER | Examination request | ||
| MKLA | Lapsed |