CN100595418C - Stone inclusion soil abrasive-proof anti-impact drill bit - Google Patents
Stone inclusion soil abrasive-proof anti-impact drill bit Download PDFInfo
- Publication number
- CN100595418C CN100595418C CN200710132241A CN200710132241A CN100595418C CN 100595418 C CN100595418 C CN 100595418C CN 200710132241 A CN200710132241 A CN 200710132241A CN 200710132241 A CN200710132241 A CN 200710132241A CN 100595418 C CN100595418 C CN 100595418C
- Authority
- CN
- China
- Prior art keywords
- parent
- drill bit
- alloy
- resistant
- wear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a wear-resistant and impact-resistant drill bit used in the civil engineering and drilling engineering. 7Cr7Mo2V2Si steel is used as the base material for a main body of the drill bit. A wear-resistant Stellite190 cobalt-base alloy reinforcing layer is melted onto the surface of the drill bit. The upper section of the main body is equipped with a radially and outwards projecting hard alloy bar, the middle-lower section is equipped with a small hard-alloy pill-shaped convex pillar, and the lower section is equipped with a wedged YG11C-type tungsten-cobalt hard alloy cutting blades. The drill bit is wear-resistant and impact-resistant, provided with a double-function of soil cutting and rock crashing, and is suitable for the rapid and high-efficiency drilling work ina stony stratum with stones or terranes.
Description
Technical field
The present invention relates to be used in the civil works drill bit of the drilling tools of soil layer boring, particularly the horsestone soil layer that accompanies stone, rock stratum in the soil is carried out the drill bit that bore operation uses.
Technical background
At present, the probing problem about horsestone soil is a still unsolved difficult problem in the world wide.The geologic structure complexity of horsestone soil mainly shows as and accompanies stone, rock stratum or stone folder weak soil layer (soil) in the soil.Because stone matter is hard more than soil property, the two resistance differs greatly, and the distribution of stone, soil layer is random, drilling tools is in bore operation, the drag effect point that drill bit is subjected to is changeable, and change in resistance is irregular, thereby has increased the difficulty of pore-forming in horsestone soil greatly.Because it is different with the cutting scheme of diamond to bore soil, the former is a bit cutting soil, and the latter then is by the extruding between drill bit and rock and friction makes rock produce micro-crack and cause it to peel off from the stratum.At present still do not have the drill bit that is specifically designed under the horsestone soil matter condition both at home and abroad, the drill bit that can be used to cut soil can not diamond, and drill bit that can rock drilling can not be cut soil.For example the drill bit of hammer drill can only be applicable to clean rock boring, can't be in horsestone soil fractured rock; Utensil such as pneumatic pick, hydraulic hammer then only can broken hardpan or more shallow rock stratum, but is unsuitable for the construction of horsestone soil; And clay cutter tool drill bits such as earth boring auger only are suitable for cutting soil, this is not only because the low diamond of Material Strength is worn easily or damages, and its structure also is unsuitable for the fragmentation to the irregular stone in the horsestone soil, therefore, is badly in need of development and is applicable to drill bit under the horsestone soil matter condition.
Summary of the invention
The purpose of this invention is to provide a kind of stone inclusion soil abrasive-proof anti-impact drill bit, solve the wear-resisting and shock resistance difficult problem of drill bit of drilling tool under the horsestone soil condition, make drill bit have cutting soil and fractured rock dual-use function, satisfy the wear-resistant and shock proof performance requirement of drill bit under the horsestone soil condition.
Stone inclusion soil abrasive-proof anti-impact drill bit of the present invention contains with the parent of 7Cr7Mo2V2Si steel as base material, and the surface cladding of parent has the wear-resisting Stellite190 cobalt-base alloys strengthening layer of one deck; The epimere of parent is provided with the radially carbide alloy bar blocks of evagination, and the middle hypomere of parent is provided with the bullet shape small convex pillar of carbide alloy, and the lower end of parent is provided with the wedge shape carbide cutting blade, and said carbide alloy is a YG11C type tungsten-cobalt alloy.
Said carbide alloy bullet shape small convex pillar is fixing by the interlocking of the blind hole on the parent.
Said carbide alloy bar blocks is fixing by interlocking of the bar-shaped trough on the parent and welding.
Said wedge shape carbide cutting blade is fixing by interlocking of the groove on the parent and welding.
Said carbide alloy bullet shape small convex pillar on the parent surface with helical pattern.
Said carbide alloy bar blocks is positioned at the small convex pillar top, in parent surface circumferential arrangement.
The Wear-resistant Co-base alloy strengthening layer on said parent surface is to adopt Stellite190 alloy electrode and oxy-acetylene flame to make welding rod lower end molten drop through the mother metal surface of heating, up to covering whole mother metal surface, cools off naturally and gets.
It is base material that this drill bit adopts the 7Cr7Mo2V2Si steel, and at surface cladding strengthening layer Stellite190, bit face intensity is improved greatly, abrasion resistance is respectively 1.2～2.5 times and 3.0～8.1 times through the 42CrMo of modified and surfaces nitrided processing alloy tool steel bit mother metal at present commonly used, has good wear-resisting and shock resistance characteristic; Accommodation to load and speed is wider, and the carbide alloy steel blade of lower end has the dual-use function of cutting soil and fractured rock; Carbide alloy YG11C small convex pillar of inlaying and carbide alloy bar blocks make rock be squeezed, hit, grind and further broken, are mixed in the soil and are carried discharge earthward by spiral deslagging sheet.This drill bit be fit in the horsestone soil zone to horsestone soil layer carry out fast, brute force, high-efficient cutting drilling operation, solved the wear-resisting and shock resistance problem of drill bit in the horsestone soil layer drilling operation.
Description of drawings
Fig. 1 is the structural representation of this stone inclusion soil abrasive-proof anti-impact drill bit.Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is an oxy-acetylene flame cladding process schematic diagram.
Fig. 4 is the presentation surface strengthening layer combines situation with mother metal a material mirror phasor.
Among the figure, 1-drill bit parent (mother metal+surface strengthen layer); 2-wedge shape hard alloy blocks (YG11C); 3-bullet shape carbide alloy small convex pillar (YG11C); 4-strip hard alloy blocks (YG11C); The 5-Stellite190 welding rod; 6-oxy-acetylene tip.
The specific embodiment
Drill bit adopts following material in following examples:
(1) drill bit parent base material: select the mother metal of 7Cr7Mo2V2Si steel (Shanghai Inst. of Materials's production) as the drilling tool drill bit, its composition (weight percentage %) is C:0.70～0.80, Cr:6.50～7.50, Mo:1.50～2.50, Si:0.50～1.50, P:0.01～0.03, S:0.01～0.03, Mn:0.25～0.35, V:1.50～2.50, Fe: surplus.Technology for Heating Processing: 850 ℃ of preheatings, 1100～1115 ℃ of quenchings, 530～570 ℃ of tempering are 2～3 times behind the oil cooling, and each 1～2 hour, hardness HRC60～63.
(2) drill bit mother metal surface strengthen layer: at mother metal surface cladding layer of surface antifriction alloy strengthening layer.The strengthening layer alloy material is that the Stellite190 cobalt-base alloys is (commercially available, Shanghai Si Taili Co., Ltd), its chemical composition (weight percentage %) is C:3.10～3.20, Cr:25.5～26.5, Ni:2.5～3.50, Mo:0.50～1.50, Si:0.50～1.50, B:0.50～1.50, Mn:0.50～1.50, Fe:4.50～5.50, Co: surplus.
(3) drill bit wedge-shaped cutting blade, bullet shape pillar and the bar blocks of inlaying: tungsten-cobalt hard alloy piece (YG11C, strain state cemented carbide works is produced).
The preparation method of embodiment 1 horsestone earth boring auger head
One. the parent surface Hardening Treatment
(1) according to the needs of the physical dimension of drill bit, the 7Cr7Mo2V2Si Steel Bar During of intercepting respective diameters and length is made the drill bit parent, removes its surperficial oxide layer, makes it expose real metal surface.
(2) with oxy-acetylene flame (transferring to neutral flame) parent is preheated to 650 ℃ (surface is kermesinus), use Stellite190 alloy electrode (commercially available) then, 30 ° of parent surface tilt, and make electrode tip apart from mother metal surface 3～6mm, make electrode end first meltization (tip becomes 25 °～30 ° approximately with the angle on mother metal surface) with oxy-acetylene flame, drop in mother metal surface through heating; According to said method successively at the mother metal surface cladding, up to covering whole mother metal surface.In the cladding process, should have between noting every 1/3 overlapping, with guarantee the cladding surface evenly, defectives such as densification, pore-free.
(3), place air cooling (can imbed the flyash slow cooling winter) with the drill bit parent after the cladding.
Can reach the degree of metallurgical binding between the surface strengthen layer of this method cladding and the fertile material, promptly combine between cladding surface strengthen layer and the mother metal firmly, can satisfy the impact requirement in the drill bit drilling process.The situation that combines of drill bit mother metal and cladding surface peening interlayer as shown in Figure 3, visible drill bit parent base material and surface peening layer material are combined into one among the figure, and a transitional region is arranged between two layer materials.
Two. the installation of drill equipment
In conjunction with Fig. 1, wedge shape hard alloy blocks (2) is embedded in the wedge-shaped slot of lower end head of drill bit parent, and adopts the method for copper brazing that the two weldering is one.In like manner, 4 strip hard alloy blocks (4) are embedded in successively in 4 bar-shaped troughs of epimere of drill bit parent, and fixing with the copper brazing welding.At last, 8 carbide alloy bullet shape small convex pillars (3) being embedded successively hypomere in the drill bit parent is in 8 blind holes that the circumference spiral distributes and gets final product.
On MPX-2000 type testing machine, carry out impact wear test.Test conditions is: room temperature (25 ℃) dry friction and wear, and relative air humidity is RH60%, and load is respectively 10N, 30N, 50N and 100N, and sliding speed is respectively 2.68m/s, 3.99m/s and 8.00m/s, and each testing total revolution is 1000 commentaries on classics; To the even part that rubs is the white fused alumina test block of 120#.Result of the test shows: the anti-wear performance of the bit matrix material of being made by the present invention is existing 3～8 times of drill bit material 42CrMo alloy steel (modifier treatment, surface carburization) commonly used.
The drill bit that the present invention makes is used on the military fast pore-creating rig of certain type, is used to finish the quick drilling task in horsestone soil band (the anistree area of Xuzhou suburban area, Hebei province's Huai Lai county magistrate front yard reservoir and Tibet sheep).Application result shows: the wear resistant and impact resistant life-span of the horsestone earth boring auger head of being made by the present invention is 2～3 times of former drill bit (42CrMo alloy steel), has obtained good effect.
Claims (4)
1. stone inclusion soil abrasive-proof anti-impact drill bit contains parent, it is characterized in that parent with the 7Cr7Mo2V2Si steel as base material, surface cladding has the wear-resisting Stellite190 cobalt-base alloys strengthening layer of one deck; The epimere of parent is provided with the radially carbide alloy bar blocks of evagination, and the middle hypomere of parent is provided with carbide alloy bullet shape small convex pillar, and the lower end of parent is provided with the wedge shape carbide cutting blade, and said carbide alloy is a YG11C type tungsten-cobalt alloy; Said carbide alloy bullet shape small convex pillar on the parent surface with helical pattern, said carbide alloy bullet shape small convex pillar is in parent surface circumferential arrangement, the Wear-resistant Co-base alloy strengthening layer on said parent surface is to adopt Stellite190 alloy electrode and oxy-acetylene flame to make welding rod lower end molten drop on the mother metal surface through heating, up to covering whole mother metal surface, cool off naturally and get.
2. stone inclusion soil abrasive-proof anti-impact drill bit according to claim 1 is characterized in that said carbide alloy bullet shape small convex pillar is fixing by the interlocking of the blind hole on the parent.
3. stone inclusion soil abrasive-proof anti-impact drill bit according to claim 1 is characterized in that said carbide alloy bar blocks is fixing by interlocking of the bar-shaped trough on the parent and welding.
4. stone inclusion soil abrasive-proof anti-impact drill bit according to claim 1 is characterized in that said wedge shape carbide cutting blade is fixing by interlocking of the groove on the parent and welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710132241A CN100595418C (en) | 2007-09-14 | 2007-09-14 | Stone inclusion soil abrasive-proof anti-impact drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710132241A CN100595418C (en) | 2007-09-14 | 2007-09-14 | Stone inclusion soil abrasive-proof anti-impact drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101122212A CN101122212A (en) | 2008-02-13 |
| CN100595418C true CN100595418C (en) | 2010-03-24 |
Family
ID=39084693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710132241A Expired - Fee Related CN100595418C (en) | 2007-09-14 | 2007-09-14 | Stone inclusion soil abrasive-proof anti-impact drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100595418C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103419284A (en) * | 2012-05-21 | 2013-12-04 | 博世电动工具（中国）有限公司 | Drill bit |
| CN105014794A (en) * | 2015-08-13 | 2015-11-04 | 成都凯隆机械维修有限公司 | Cleavage gun system of hydraulic cleaving machine for rock and concrete |
-
2007
- 2007-09-14 CN CN200710132241A patent/CN100595418C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101122212A (en) | 2008-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6126709A (en) | Cemented carbide body with improved high temperature and thermomechanical properties | |
| US9458607B2 (en) | Rotatable cutting tool with head portion having elongated projections | |
| US20040065484A1 (en) | Diamond tip point-attack bit | |
| CN104662252A (en) | Rolling cutter with close loop retaining ring | |
| CA2664212A1 (en) | Abrasive wear-resistant hardfacing materials, drill bits and drilling tools and including abrasive wear-resistant hardfacing materials, and methods for applying abrasive wear resistant hardfacing materials to drill bits and drilling tools | |
| CN107338438A (en) | A kind of wear-resisting laser cladding layer of hobboing cutter cutter ring and preparation method thereof | |
| US9828806B2 (en) | Roller bit for rock breaking by rotary cutting | |
| EP3417149B1 (en) | Cutting tool for coal mining, mechanical processing of rocks, use during rotary drilling or working asphalt, concrete or like material, provided with longitudinally extending grooves | |
| Prokopenko et al. | New design of cutters for coal mining machines | |
| CN104148885A (en) | Polycrystalline diamond pick-rod machining process | |
| CN201078233Y (en) | Combined hard metal mine coal cutter bit | |
| CN100595418C (en) | Stone inclusion soil abrasive-proof anti-impact drill bit | |
| CN201865582U (en) | Steel diamond drill bit | |
| CN104271884A (en) | Cutting head tool for tunnel boring machine | |
| CN105804663B (en) | A kind of single-cone rotary drill bit with PDC combination teeth | |
| CN202165081U (en) | High-strength high-ductility novel integrated cutting pick | |
| CN106522940A (en) | Abrasion-resistant tool bit | |
| CN102400646A (en) | Composite bit formed by rotary cut bit and roller bit | |
| CN203729884U (en) | Diamond-impregnated drill bit with arc teeth | |
| CN110560866A (en) | diamond cutting tooth and production method thereof | |
| CN220849673U (en) | Development machine cutting pick capable of improving exploitation efficiency | |
| CN205047221U (en) | Mining cutter with tungsten carbide surface strengthening layer | |
| CN210714472U (en) | Strong gauge steel tooth roller bit | |
| CN108412491B (en) | Composite cutting tooth | |
| CN2623865Y (en) | Steel tooth and compound tooth pineapple bit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20120914 |