CN103611999A - Repair technique for medium-carbon-steel parts - Google Patents
Repair technique for medium-carbon-steel parts Download PDFInfo
- Publication number
- CN103611999A CN103611999A CN201310543452.XA CN201310543452A CN103611999A CN 103611999 A CN103611999 A CN 103611999A CN 201310543452 A CN201310543452 A CN 201310543452A CN 103611999 A CN103611999 A CN 103611999A
- Authority
- CN
- China
- Prior art keywords
- welding
- stainless steel
- carbon steel
- medium carbon
- weld
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention belongs to welding techniques, in particular to a welding repair technique for medium-carbon-steel parts. For selected medium-carbon-steel parts, stainless steel welding rods are adopted to directly weld short welding seams at the normal temperature. Welding is performed according to following requirements: impurities at the edges of welding junctions are cleaned, the welding junctions are polished, and V-shaped grooves are formed in the welding junctions; a direct-current welder is selected, the direct-current reverse polarity is adopted, iron is lapped to the positive pole of the welder, and welding tongs are connected to the negative pole of the welder; the stainless steel welding rods A137 are selected, and are dried before being used. Through application of the stainless steel welding rods, stress of the welding junctions can be reduced, hydrogen cracks caused by welding can be reduced or eliminated, and the welding seams are stable in quality after welding and can meet use requirements of the parts; meanwhile, by the repair technique, operation steps and time are reduced, and production efficiency is improved.
Description
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Technical field
The invention belongs to welding procedure, specifically a kind of welding and restoring process of medium carbon steel part.
Background technology
The parts that the useful medium carbon steel of environmental protection equipment production company is material, particularly some axle class and Model For The Bush-axle Type Parts.Medium carbon steel phosphorus content is high, and welding easily produces embrittlement, the defects such as crackle and pore.General welding technique is: preheating, and preheating is conducive to reduce the maximum hardness of medium carbon steel heat affected area, prevents cold crack, and preheating can also improve joint plasticity, reduces postwelding residual stress, 150 ~ 250 ℃ of left and right of preheat temperature.Bevel is split into V-shaped groove type as far as possible, is conducive to welding, reduces the phosphorus content in weld seam, prevents that crackle from producing.Heat treatment, the heat treatment that eliminates stress immediately of postwelding butt-welding fitting,, easily there is the phenomenons such as cracking in the heat treatment if postwelding can not eliminate stress, the about every 10mm of hot temperature retention time needs about 1h.Medium carbon steel welding needs first preheating, then welds, the stove that finally reduces phlegm and internal heat insulation slow cooling, and process is complicated, wastes time and energy.
Summary of the invention
The object of the present invention is to provide a kind of welding and restoring process of medium carbon steel part easily and effectively.
Object of the present invention can be achieved through the following technical solutions:
A medium carbon steel part repair technology, for the medium carbon steel material parts of choosing, its short weld seam directly adopts stainless steel electrode to weld at normal temperatures, and welding should be done by following requirement:
(1) impurity at cleaning weld bond edge, polishing is clean, and weld bond is opened V font groove;
(2) select DC welder and adopt DC reverse connection, the positive ground of welding machine, the negative pole of welding machine connects soldering turret;
(3) welding rod is chosen as A137 stainless steel electrode, before use, dries;
(4) adopt diameter 2.5 welding rods, little electric current welding, the short weldering of segmentation, one section of every weldering is done one section and is knocked, welding arc manipulation direction from left to right, from top to bottom;
(5) after each welding bead is soldered, welding slag be cleaned out, be checked and have or not weld defect, if any gas hole defect, should root out in time repair welding again.
Described process application is in axle class.
Described process application is in shaft sleeve.
Beneficial effect of the present invention: the present invention uses stainless steel electrode, because of austenitic weld metal plasticity good, can reduce welding point stress, the ability of stainless steel electrode dissolved hydrogen is strong, can reduce or eliminate the hydrogen crackle that welding occurs, after welding, weldquality is stable, can meet the instructions for use of part, simultaneously, the present invention has reduced operating procedure and time, has improved the efficiency of producing.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
A medium carbon steel part repair technology, for the medium carbon steel material parts of choosing, its short weld seam directly adopts stainless steel electrode to weld at normal temperatures, and this technique can be applicable to axle class or shaft sleeve.Welding should be done by following requirement:
(1) impurity within the scope of cleaning weld bond edge 10-20mm, polishing is clean, and weld bond is opened V font groove;
(2) select DC welder and adopt DC reverse connection, the positive ground of welding machine, the negative pole of welding machine connects soldering turret;
(3) welding rod is chosen as A137 stainless steel electrode, before use, dries;
(4) adopt diameter 2.5 welding rods, little electric current welding, the short weldering of segmentation, one section of every weldering is done one section and is knocked, welding arc manipulation direction from left to right, from top to bottom;
(5) after each welding bead is soldered, welding slag be cleaned out, be checked and have or not weld defect, if any gas hole defect, should root out in time repair welding again.
Select stainless steel electrode A137, φ 4mm, good because of its austenitic weld metal plasticity, can reduce welding point stress, the ability of stainless steel electrode dissolved hydrogen is strong, can reduce or eliminate the hydrogen crackle that welding occurs, after welding, weldquality is stable, can meet the instructions for use of part, meanwhile, the present invention has reduced operating procedure and time, has improved the efficiency of producing.
And General welding process using carbon steel needs operating personnel Personal Skills and Insulation, careless slightly, still have long-living crackle tendency.This process time above shortens to about ten minutes from original 1-2 days.After process optimization, operating time and operating personnel have been reduced, improved efficiency, saved cost, increased economic efficiency, welding process has been omitted the time of heating and slow cooling, only need an operative employee to complete, in operating process, without measures such as process heating and insulations, one man operation, required cutting tension and all meeting the demands by tabling look-up of bearing in product use procedure.
Claims (3)
1. a medium carbon steel part repair technology, is characterized in that, for the medium carbon steel material parts of choosing, its short weld seam directly adopts stainless steel electrode to weld at normal temperatures, and welding should be done by following requirement:
(1) impurity at cleaning weld bond edge, polishing is clean, and weld bond is opened V font groove;
(2) select DC welder and adopt DC reverse connection, the positive ground of welding machine, the negative pole of welding machine connects soldering turret;
(3) welding rod is chosen as A137 stainless steel electrode, before use, dries;
(4) adopt diameter 2.5 welding rods, little electric current welding, the short weldering of segmentation, one section of every weldering is done one section and is knocked, welding arc manipulation direction from left to right, from top to bottom;
(5) after each welding bead is soldered, welding slag be cleaned out, be checked and have or not weld defect, if any gas hole defect, should root out in time repair welding again.
2. a kind of medium carbon steel part repair technology according to claim 1, is characterized in that described technique
Be applied to axle class.
3. a kind of medium carbon steel part repair technology according to claim 1, is characterized in that, described process application is in shaft sleeve.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310543452.XA CN103611999A (en) | 2013-11-06 | 2013-11-06 | Repair technique for medium-carbon-steel parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310543452.XA CN103611999A (en) | 2013-11-06 | 2013-11-06 | Repair technique for medium-carbon-steel parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103611999A true CN103611999A (en) | 2014-03-05 |
Family
ID=50162733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310543452.XA Pending CN103611999A (en) | 2013-11-06 | 2013-11-06 | Repair technique for medium-carbon-steel parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103611999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605545A (en) * | 2020-12-29 | 2021-04-06 | 张家港宏昌钢板有限公司 | Repair method for weld cracking between inner cylinder and outer cylinder of cylinder cooler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62158570A (en) * | 1985-12-28 | 1987-07-14 | Sumitomo Metal Ind Ltd | Reinforcement welding method for existing pipe |
| CN101214573A (en) * | 2008-01-03 | 2008-07-09 | 湖北省电力试验研究院 | Medium temperature thick-wall WB36/1Cr18Ni9Ti dissimilar steel welding technology |
| CN102441729A (en) * | 2011-09-27 | 2012-05-09 | 新疆蓝山屯河聚酯有限公司 | Welding technology for medium carbon steel, stainless steel and cast iron |
| CN102463402A (en) * | 2010-11-18 | 2012-05-23 | 成都植源机械科技有限公司 | Process for welding medium-high carbon steel without cracking and deformation |
-
2013
- 2013-11-06 CN CN201310543452.XA patent/CN103611999A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62158570A (en) * | 1985-12-28 | 1987-07-14 | Sumitomo Metal Ind Ltd | Reinforcement welding method for existing pipe |
| CN101214573A (en) * | 2008-01-03 | 2008-07-09 | 湖北省电力试验研究院 | Medium temperature thick-wall WB36/1Cr18Ni9Ti dissimilar steel welding technology |
| CN102463402A (en) * | 2010-11-18 | 2012-05-23 | 成都植源机械科技有限公司 | Process for welding medium-high carbon steel without cracking and deformation |
| CN102441729A (en) * | 2011-09-27 | 2012-05-09 | 新疆蓝山屯河聚酯有限公司 | Welding technology for medium carbon steel, stainless steel and cast iron |
Non-Patent Citations (2)
| Title |
|---|
| 李寿芳: "大型中碳钢件冷焊焊补技术", 《机械开发》 * |
| 沙慧丽: "中碳钢的焊接", 《科技资讯》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605545A (en) * | 2020-12-29 | 2021-04-06 | 张家港宏昌钢板有限公司 | Repair method for weld cracking between inner cylinder and outer cylinder of cylinder cooler |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140305 |