CN101947697A - 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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- CN101947697A CN101947697A CN 201010255477 CN201010255477A CN101947697A CN 101947697 A CN101947697 A CN 101947697A CN 201010255477 CN201010255477 CN 201010255477 CN 201010255477 A CN201010255477 A CN 201010255477A CN 101947697 A CN101947697 A CN 101947697A
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- welding
- weld seam
- welding bead
- mar proof
- capping layer
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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 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; and then residual weld passes of a cover surface layer 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 made 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 have 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 achieving the above object, the technical solution used in the present invention 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.
The welding heating furnace of immediately workpiece being packed into after finishing wherein, furnace temperature is set to 240 ℃, be incubated after 60 minutes, 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 and 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, by 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 schematic diagram of welding method in the invention.
The specific embodiment
The inventive method key step is as follows: 1, require workpiece to be welded is heated to certain temperature range according to common process, use the low alloy steel welding wire that meets technological requirement to weld basic welding bead by the technological specification of determining; When 2, being welded to certain height, in bevel for welding, add the welding of carrying out capping layer welding bead 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, welding carry out immediately after finishing after-baking again covering insulation material slow down cooling velocity.
Among the present invention original welding bead is divided into basic welding bead and capping layer welding bead 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 with excellent mechanical property, adjust the kind and the content of alloying element in the weld(ing) deposit by the method for adding an amount of antifriction alloy silk filling at capping layer welding bead, thereby effectively improved the hardness of capping layer welding bead.
Embodiment 1
Weld out earlier the basic welding bead that accounts for welding bead cumulative volume 75%, tiling one deck antifriction alloy fills silk in the other bevel for welding of basic welding bead then, and (length that fills silk is identical with welding bead, φ 1.6mm fills silk), antifriction alloy fills silk by weight, and its composition is C 0.5%, Mn 1.0%, Cr 6.0%, Mo 1.2%, surplus is Fe, 15% of this antifriction alloy silk filling consumption whole capping layer welding bead cumulative volume for its volume accounts for, and then continue to weld out remaining capping layer welding bead, 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.
The welding heating furnace of immediately workpiece being packed into after finishing, furnace temperature is set to 240 ℃, be incubated after 60 minutes, and coming out of the stove afterwards, air cooling to normal temperature gets final product.
Embodiment 2
Weld out earlier the basic welding bead that accounts for welding bead cumulative volume 70%, tiling one deck antifriction alloy fills silk in the other bevel for welding of basic welding bead then, and (length that fills silk is identical with welding bead, φ 1.6mm fills silk), antifriction alloy fills silk by weight, and its composition is C 0.4%, Mn 0.8%, Cr 5.5%, Mo 1.0%, surplus is Fe, 9% of this antifriction alloy silk filling consumption whole capping layer welding bead cumulative volume for its volume accounts for, and then continue to weld out remaining capping layer welding bead, 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.
The welding heating furnace of immediately workpiece being packed into after finishing, furnace temperature is set to 220 ℃, be incubated after 70 minutes, 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 that accounts for welding bead cumulative volume 80%, tiling one deck antifriction alloy fills silk in the other bevel for welding of basic welding bead then, and (length that fills silk is identical with welding bead, φ 1.6mm fills silk), antifriction alloy fills silk by weight, and its composition is C 0.55%, Mn 1.1%, Cr 6.5%, Mo 1.5%, surplus is Fe, 17% of this antifriction alloy silk filling consumption whole capping layer welding bead cumulative volume for its volume accounts for, and then continue to weld out remaining capping layer welding bead, 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.
The welding heating furnace of immediately workpiece being packed into after finishing, furnace temperature is set to 250 ℃, be incubated after 50 minutes, 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)
Adopting Rockwell to make hard machine detects at ambient temperature
2, hardness (alloy fills silk and dissolves) uniformity detects (HRC)
Group one and two groups of test samples of group two (all adopting embodiment 2 methods), the alloy silk filling quantity difference of interpolation has obtained different hardness; But the interval error amount of hardness range separately is very little, shows that hardness is even.
3, the mechanical properties test of welding point contrast:
Group one and group two all adopt embodiment 2 methods.
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 and group two all adopt embodiment 2 methods.
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 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.
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 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: thus 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.
5. the welding method of raising weld seam mar proof as claimed in claim 1, it is characterized in that: the heating furnace of immediately workpiece being packed into after wherein welding is finished, 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN101947697A true CN101947697A (en) | 2011-01-19 |
| CN101947697B CN101947697B (en) | 2012-06-06 |
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| CN2010102554776A Expired - Fee Related CN101947697B (en) | 2010-08-17 | 2010-08-17 | Welding method for improving abrasion resistance of welding line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103921075A (en) * | 2014-04-28 | 2014-07-16 | 武汉钢铁(集团)公司 | Method for manufacturing wear resistant slurry conveying longitudinal welded pipe |
| CN113441884A (en) * | 2021-08-30 | 2021-09-28 | 山东山宇重工机械有限公司 | Robot welding device for loading arm plate |
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| US5914055A (en) * | 1996-11-18 | 1999-06-22 | Tennessee Valley Authority | Rotor repair system and technique |
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| 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 |
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2010
- 2010-08-17 CN CN2010102554776A patent/CN101947697B/en not_active Expired - Fee Related
Patent Citations (10)
| 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 |
| JPH06320280A (en) * | 1993-03-31 | 1994-11-22 | Nippon Steel Corp | Butt welding method for both-side clad plural layer steels |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103921075A (en) * | 2014-04-28 | 2014-07-16 | 武汉钢铁(集团)公司 | Method for manufacturing wear resistant slurry conveying longitudinal welded pipe |
| 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 |
| CN113441884A (en) * | 2021-08-30 | 2021-09-28 | 山东山宇重工机械有限公司 | Robot welding device for loading arm plate |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101947697B (en) | 2012-06-06 |
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