CN101947697B - Welding method for improving abrasion resistance of welding line - Google Patents
Welding method for improving abrasion resistance of welding line Download PDFInfo
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- CN101947697B CN101947697B CN2010102554776A CN201010255477A CN101947697B CN 101947697 B CN101947697 B CN 101947697B CN 2010102554776 A CN2010102554776 A CN 2010102554776A CN 201010255477 A CN201010255477 A CN 201010255477A CN 101947697 B CN101947697 B CN 101947697B
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- welding bead
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- weld seam
- mar proof
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Abstract
The invention relates to a welding method for improving abrasion resistance of a welding line. The method is characterized in that: firstly, a basic weld pass (1) taking 70-80% of the total volume of the welding pass is welded; then a layer of abrasion resistant alloy filler wire is laid in a welding groove on the side of the basic weld pass (1); and then residual weld passes of a cover surface layer (2) are welded. With the technical scheme, the method is advantaged that: 1, the basic weld pass has excellent comprehensive mechanics performance to ensure the requirement about the intensity, the plasticity and the roughness to the welding line for the middle groove product when used. 2, the weld pass of the cover surface layer ensures the plasticity and the roughness and improves the abrasion resistance of the welding line. 3, the operation ability is strong, the welding material is not replaced, which is beneficial for the site operation and management. 4, the number of the alloy filler wire is changed to control the hardness of the welding line flexibly according to the requirement; and the method is simple and practical.
Description
Technical field
The present invention relates to a kind of welding method that improves the weld seam mar proof.
Background technology
Intermediate channel is the critical component of coal down-hole fully-mechanized mining working surface conveyer, also has the walking track of coal-winning machine and the function of drawing moving hydraulic support simultaneously concurrently.The part that intermediate channel is processed by materials such as high-strength abrasion-proof steel plate and special cast steels is welded.The groove width of at present large-scale drag conveyor has reached 1.2 meters, 350 meters of active lengths, 3 * 1000 kilowatts of installed powers, 4000 tons/hour of conveying capacitys.Ton surplus the coal-winning machine weight of using 100 that matches, ton surplus hydraulic support list frame weighs 30.Therefore require intermediate channel not only to possess high reliability and wearability, adapt to the instructions for use of high-yield and high-efficiency mine.Also must possess very high comprehensive mechanical property simultaneously, satisfy as the walking track of coal-winning machine and the function of drawing moving hydraulic support.For improving the mar proof of intermediate channel, increase the service life, the strength degree and the hardness of materials such as high-strength abrasion-proof steel plate of selecting for use and special cast steel reached respectively >=1400MPa, 425HB and 1000MPa, 380HB.
The intensity hardness of mother metal has improved, and the welding difficulty has increased, and has proposed new research topic to weld seam design: 1, if select full-strength weld for use, then the moulding of deposited metal, toughness reduce; In use very easily cause the weld fatigue cracking; 2, if select low assembly weld seam for use, though deposited metal have high mould, toughness, intensity, hardness are low relatively, abrasion resistance is poor; It is long-pending that excessive abrasion can reduce section of weld joint, destroy thereby produce the concentrated welding seam failure that causes of stress, and because of excessive wear causes product shortening in service life, be to cause weld cracking, the accident of product failure once had generation.
Summary of the invention
The purpose of this invention is to provide a kind of welding method that improves the weld seam mar proof; Can guarantee that weld seam possesses under the prerequisite of excellent comprehensive mechanical properties; Improve mar proof; Realize that weld seam is basic identical with the wear extent of mother metal under identical working condition, improve the wearability of intermediate channel product, increase the service life.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of welding method that improves the weld seam mar proof; Its special feature is; Weld out earlier the basic welding bead that accounts for welding bead cumulative volume 70-80%, tiling one deck antifriction alloy fills silk in the other bevel for welding of basic welding bead then, continues to weld out remaining capping layer welding bead again and gets final product.
The antifriction alloy 9-17% of consumption whole capping layer welding bead cumulative volume that fills silk wherein for its volume accounts for.
Wherein antifriction alloy fills silk by weight that its composition is C 0.4～0.55%, and Mn 0.8～1.1%, Cr5.5～6.5%, and Mo 1.0～1.5%, and surplus is Fe.
Thereby welding gun is done welding fabrication of teeter and is guaranteed that antifriction alloy fills silk and solve homogeneously in the molten bath when wherein welding capping layer welding bead.
Immediately with the workpiece heating furnace of packing into, furnace temperature was set to 240 ℃, be incubated after 60 minutes after wherein welding was accomplished, and come out of the stove afterwards air cooling or covering insulation material slowly cool to normal temperature and get final product.
Further, wherein insulation material is the asbestos quilt.
Adopt technical scheme of the present invention to have following technique effect:
1, basic welding bead has excellent comprehensive mechanical properties, can guarantee the intermediate channel product in use butt welded seam intensity with mould, tough performance requirement.
2, capping layer welding bead guaranteeing to mould, on the toughness basis, improving the abrasion resistance properties of weld seam.
3, workable, need not change welding material, be beneficial to execute-in-place and management.
4, through changing the quantity of the alloy silk filling of adding, can realize controlling flexibly as required the purpose of weld hardness, method is simple and practical.
Description of drawings
Accompanying drawing 1 is the sketch map of welding method in the invention, and wherein 1 representes basic welding bead, 2 expression capping layer welding bead, the special cast steel of 3 expressions, 4 expression wear-resisting steel plates.
The specific embodiment
The inventive method key step is following: 1, require workpiece to be welded is heated to certain temperature range according to common process, use the low alloy steel welding wire of according with process requirements to weld basic welding bead 1 by the technological specification of confirming; When 2, being welded to certain height, in bevel for welding, add the welding of carrying out capping layer welding bead 2 after an amount of alloy fills silk, require welding gun to do welding fabrication of teeter, guarantee that the alloy silk filling solves homogeneously in the molten bath; 3, carry out immediately after welding is accomplished after-baking again covering insulation material slow down cooling velocity.
Among the present invention original welding bead is divided into basic welding bead 1 and capping layer welding bead 2 two parts; Still use original low alloy steel welding wire; Adopt the MAG welding procedure; Select for use low-alloy high-strength welding material to feel secure and fill welding, adjust the kind and the content of alloying element in the weld(ing) deposit through add the method that an amount of antifriction alloy fills silk at capping layer welding bead 2, thereby effectively improved the hardness of capping layer welding bead 2 with excellent mechanical property.
Embodiment 1
Weld out earlier the basic welding bead 1 that accounts for welding bead cumulative volume 75%; Tiling one deck antifriction alloy fills silk in the bevel for welding on basic welding bead 1 side then, and (length that fills silk is identical with welding bead; Fill silk
), antifriction alloy silk filling its composition by weight is C 0.5%, Mn 1.0%; Cr 6.0%; Mo 1.2%, and surplus is Fe, 15% of this antifriction alloy silk filling consumption whole capping layer welding bead 2 cumulative volumes for its volume accounts for; And then continue to weld out remaining capping layer welding bead 2, thereby welding gun is done welding fabrication of teeter and is guaranteed that antifriction alloy fills silk and solve homogeneously in the molten bath during welding capping layer welding bead 2.
Immediately with the workpiece heating furnace of packing into, furnace temperature was set to 240 ℃, be incubated after 60 minutes after welding was accomplished, and coming out of the stove afterwards, air cooling to normal temperature gets final product.
Embodiment 2
Weld out earlier the basic welding bead 1 that accounts for welding bead cumulative volume 70%; Tiling one deck antifriction alloy fills silk in the bevel for welding on basic welding bead 1 side then, and (length that fills silk is identical with welding bead; Fill silk
), antifriction alloy silk filling its composition by weight is C 0.4%, Mn 0.8%; Cr 5.5%; Mo 1.0%, and surplus is Fe, 9% of this antifriction alloy silk filling consumption whole capping layer welding bead 2 cumulative volumes for its volume accounts for; And then continue to weld out remaining capping layer welding bead 2, thereby welding gun is done welding fabrication of teeter and is guaranteed that antifriction alloy fills silk and solve homogeneously in the molten bath during welding capping layer welding bead 2.
Immediately with the workpiece heating furnace of packing into, furnace temperature was set to 220 ℃, be incubated after 70 minutes after welding was accomplished, and the back covering asbestos of coming out of the stove are slowly cooled to normal temperature and get final product.
Embodiment 3
Weld out earlier the basic welding bead 1 that accounts for welding bead cumulative volume 80%; Tiling one deck antifriction alloy fills silk in the bevel for welding on basic welding bead 1 side then, and (length that fills silk is identical with welding bead; Fill silk
); Antifriction alloy fills silk by weight, and its composition is C 0.55%; Mn 1.1%, and Cr 6.5%, and Mo 1.5%; Surplus is Fe; This antifriction alloy 17% of consumption whole capping layer welding bead 2 cumulative volumes that fill silk, and then continue to weld out remaining capping layer welding bead 2 for its volume accounts for, thus welding gun is done welding fabrication of teeter and is guaranteed that the antifriction alloy silk filling solves homogeneously in the molten bath during welding capping layer welding bead 2.
Immediately with the workpiece heating furnace of packing into, furnace temperature was set to 250 ℃, be incubated after 50 minutes after welding was accomplished, and come out of the stove back air cooling or covering asbestos are slowly cooled to normal temperature and get final product.
Technique effect of the present invention detects as follows:
1, experimental condition
Original technology: adopt low alloy steel welding wire
Group one and group two (all adopting embodiment 2 methods): adopt low alloy steel welding wire+alloy silk filling (diameter is φ 1.6mm) to adopt Rockwell to make hard machine and detect at ambient temperature
2, hardness (alloy fills silk and dissolves) uniformity detects (HRC)
Two groups of test samples of group one and group two (all adopting embodiment 2 methods), the alloy silk filling quantity of interpolation is different, has obtained different hardness; But the interval error amount of hardness range separately is very little, shows even hardness.
3, the mechanical properties test of welding point contrast:
Group one all adopts embodiment 2 methods with group two.
As above shown in the table, in the certain rigidity scope, welding point has higher intensity and moulds, toughness.
4, the metal lographic examination of capping layer welding bead:
Group one all adopts embodiment 2 methods with group two.
As above shown in the table, microstructure is good, and the granular bainite+acicular ferrite structure in the deposited metal makes welding point have high mar proof to have good comprehensive mechanical properties again.
Claims (6)
1. welding method that improves the weld seam mar proof; It is characterized in that: weld out earlier the basic welding bead (1) that accounts for welding bead cumulative volume 70-80%; Tiling one deck antifriction alloy fills silk in the other bevel for welding of basic welding bead (1) then, continues to weld out remaining capping layer welding bead (2) again and gets final product.
2. the welding method of raising weld seam mar proof as claimed in claim 1 is characterized in that: the antifriction alloy 9-17% of consumption whole capping layer welding bead (2) cumulative volume for its volume accounts for that fills silk wherein.
3. the welding method of raising weld seam mar proof as claimed in claim 1 is characterized in that: wherein antifriction alloy fills silk by weight that its composition is C 0.4～0.55%, and Mn 0.8～1.1%, Cr5.5～6.5%, and Mo 1.0～1.5%, and surplus is Fe.
4. the welding method of raising weld seam mar proof as claimed in claim 1 is characterized in that: wherein weld capping layer welding bead (2) thus the time welding gun do welding fabrication of teeter and guarantee that antifriction alloy fills silk and solve homogeneously in the molten bath.
5. the welding method of raising weld seam mar proof as claimed in claim 1; It is characterized in that: after wherein welding is accomplished immediately with the workpiece heating furnace of packing into; Furnace temperature is set to 220-250 ℃, is incubated after 50-70 minute, and come out of the stove back air cooling or covering insulation material slowly cool to normal temperature and get final product.
6. the welding method of raising weld seam mar proof as claimed in claim 5 is characterized in that: wherein insulation material is the asbestos quilt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102554776A CN101947697B (en) | 2010-08-17 | 2010-08-17 | Welding method for improving abrasion resistance of welding line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102554776A CN101947697B (en) | 2010-08-17 | 2010-08-17 | Welding method for improving abrasion resistance of welding line |
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| CN101947697A CN101947697A (en) | 2011-01-19 |
| CN101947697B true CN101947697B (en) | 2012-06-06 |
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| CN102910418A (en) * | 2012-09-28 | 2013-02-06 | 北京二七轨道交通装备有限责任公司 | Roller guide rail and manufacturing method thereof, chain transmission system and subgrade treating vehicle |
| CN103921075B (en) * | 2014-04-28 | 2016-01-20 | 武汉钢铁(集团)公司 | A kind of preparation method of wear-resistant slurry pipeline steel ERW |
| CN113441884B (en) * | 2021-08-30 | 2021-11-09 | 山东山宇重工机械有限公司 | Robot welding device for loading arm plate |
Citations (9)
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|---|---|---|---|---|
| FR2265493B1 (en) * | 1974-03-29 | 1977-02-18 | Sncf | |
| DD247624A1 (en) * | 1986-03-27 | 1987-07-15 | Zentralinstitut Schweiss | WEAR-RESISTANT ALLOY FOR WELDING |
| US5914055A (en) * | 1996-11-18 | 1999-06-22 | Tennessee Valley Authority | Rotor repair system and technique |
| US5957365A (en) * | 1997-03-03 | 1999-09-28 | Anthon; Royce A. | Brazing rod for depositing diamond coating to metal substrate using gas or electric brazing techniques |
| JP3283768B2 (en) * | 1996-10-28 | 2002-05-20 | 株式会社神戸製鋼所 | High strength Cr-Mo steel TIG weld metal and TIG welding method |
| US6495798B1 (en) * | 2000-09-21 | 2002-12-17 | Lincoln Global, Inc. | Radial tube torch head |
| KR20040083407A (en) * | 2004-09-10 | 2004-10-01 | 오영민 | Overlay welding layer and welding wire for fabricationg the same |
| JP3579573B2 (en) * | 1997-09-30 | 2004-10-20 | 株式会社神戸製鋼所 | Single side welding method by carbon dioxide arc welding |
| CN1974101A (en) * | 2006-12-19 | 2007-06-06 | 郑州煤矿机械集团有限责任公司 | Method of welding low alloy high strength steel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06320280A (en) * | 1993-03-31 | 1994-11-22 | Nippon Steel Corp | Butt welding method for both-side clad plural layer steels |
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2010
- 2010-08-17 CN CN2010102554776A patent/CN101947697B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2265493B1 (en) * | 1974-03-29 | 1977-02-18 | Sncf | |
| DD247624A1 (en) * | 1986-03-27 | 1987-07-15 | Zentralinstitut Schweiss | WEAR-RESISTANT ALLOY FOR WELDING |
| JP3283768B2 (en) * | 1996-10-28 | 2002-05-20 | 株式会社神戸製鋼所 | High strength Cr-Mo steel TIG weld metal and TIG welding method |
| US5914055A (en) * | 1996-11-18 | 1999-06-22 | Tennessee Valley Authority | Rotor repair system and technique |
| US5957365A (en) * | 1997-03-03 | 1999-09-28 | Anthon; Royce A. | Brazing rod for depositing diamond coating to metal substrate using gas or electric brazing techniques |
| JP3579573B2 (en) * | 1997-09-30 | 2004-10-20 | 株式会社神戸製鋼所 | Single side welding method by carbon dioxide arc welding |
| US6495798B1 (en) * | 2000-09-21 | 2002-12-17 | Lincoln Global, Inc. | Radial tube torch head |
| KR20040083407A (en) * | 2004-09-10 | 2004-10-01 | 오영민 | Overlay welding layer and welding wire for fabricationg the same |
| CN1974101A (en) * | 2006-12-19 | 2007-06-06 | 郑州煤矿机械集团有限责任公司 | Method of welding low alloy high strength steel |
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Granted publication date: 20120606 Termination date: 20190817 |