CN105945404A - 27simn alloy steel welding method - Google Patents
27simn alloy steel welding method Download PDFInfo
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- CN105945404A CN105945404A CN201610454935.6A CN201610454935A CN105945404A CN 105945404 A CN105945404 A CN 105945404A CN 201610454935 A CN201610454935 A CN 201610454935A CN 105945404 A CN105945404 A CN 105945404A
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- Prior art keywords
- welding
- weld
- temperature
- 27simn
- heating
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Classifications
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- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a 27SiMn alloy steel welding method. According to the 27SiMn alloy steel welding method, gases are adopted for protecting welding so as to reduce welding defects such as sand holes and inclusions; the preheating temperature is 250 DEG C before welding; and annealing is performed after welding. As numerous sand holes are easily generated inside a forge piece, MnO2 is generated after Mn contacts with O2, and the inclusions are generated inside the forge piece, therefore, the insulation of air from the forge piece is paid attention to in a welding process, especially, the 27SiMn alloy steel is prevented from contacting with oxygen so as to reduce generation of waste products.
Description
Technical field
The present invention relates to welded steel technique, be specifically related to 27SiMn steel alloy welding method.
Background technology
Si in welding with O2Contact produces SiO2, inside forging, it is easily generated the most a lot of trachoma, and
Mn and O2Contact can produce again MnO2,Can produce again inside forging and be mingled with.Therefore to weigh in welding process
Depending on isolation air, particularly with the contacting of oxygen, reduce the generation of waste product.Conventional welding method has nitrogen gas
Body protection weldering, 27SiMn phosphorus content being more than 0.25%, containing two kinds of elements of Si, Mn, so enhancing simultaneously
The Forming ability of carbide in steel, while making it have superperformance, too increases the cold of welding point
Crack sensitivity.
Summary of the invention
For solving technical problem described in background technology, the present invention by the following technical solutions: 27SiMn alloy
Steel welding method, it comprises the following steps:
1) ensure being dried of weldment surface before welding, remove to-be-welded pieces surface contaminants；
2) effusion of diffusible hydrogen in welding pre-heating temperature 250-350 DEG C, beneficially weld metal, it is to avoid produce
Hydrogen induced cracking, the most also reduces the degree of hardening of weld dimensions；
3) heat range is weld seam every side more than 50-150mm, and preheating temperature is preferably at the back side of weldment heating surface
Measuring, measuring point should be not less than away from 50mm through front pad all directions from electric arc；
4) using CO2+Ar gas shielded arc welding, the welding current of 150-180A, between the weld seam of 0.5-1.5mm
Gap, the weldingvoltage of 18-22V, the welding wire elongation of 10mm, the soldering angle of 3mm, with 10-15L
Gas flow, speed of welding per minute for 400-500mm per minute are welded；
5) after welding, in weld seam, the diffusibility hydrogen of high-load can produce cold crack, reduces the content of diffusible hydrogen, should
Carrying out post weld heat treatment, heating-up temperature 600-700 DEG C, air cooling of coming out of the stove after being incubated 2-3 hour, shove charge to prevent
Workpiece deforms.
Preferably, step 1) preheating temperature is 300 DEG C before welding, post weld heat treatment heating-up temperature 650 DEG C,
Coming out of the stove after being incubated 3 hours air cooling, shove charge workpiece to be prevented deforms.
Should select low hydrogen type welding material, it has certain desulfidation, and deposited metal plasticity and toughness are good as far as possible
Good, diffusion hydrogen amount is few again, and no matter for fire check or hydrogen cooling crack, crack resistance is the highest.Often it is soldered
Together, application wheel machine is polished welding bead, removes the splash in welding bead and slag, and ensure welding bead in
" concavity " or " nearly concavity "；
Again by cooling condition, the construction bar of the planform of weldment, weldment and surrounding in practical operation
Part, the multifactor impact such as operating technology of welder, for ensureing the reliability of pre-heat effect, do not deteriorating construction
On the basis of condition, preheating temperature can be properly increased.
The invention has the beneficial effects as follows: local preheating or overall preheating equably, it is possible to reduce welding region quilt
Temperature difference between welder's part.On the one hand reduce welding stress, on the other hand, reduce weld strain speed
Rate, is conducive to avoiding producing weld crack, owing to the welding performance of 27SiMn is poor, tackles work before welding
Part preheats, and weld preheating can slow down the ease of diffusible hydrogen in the rate of cooling of postwelding, beneficially weld metal
Go out, it is to avoid produce hydrogen induced cracking.The most also reduce the degree of hardening of weld dimensions, improve welding
The crack resistance of joint.
Detailed description of the invention
Concrete operation technological process is as follows:
27SiMn steel alloy welding method, it comprises the following steps:
1) ensure being dried of weldment surface before welding, remove to-be-welded pieces surface contaminants；
2) effusion of diffusible hydrogen in welding pre-heating temperature 250 DEG C, beneficially weld metal, it is to avoid produce hydrogen and cause
Crackle, the most also reduces the degree of hardening of weld dimensions；
3) heat range is weld seam every side 60mm, and preheating temperature is preferably measured at the back side of weldment heating surface,
Measure point should from electric arc away from front pad all directions 60mm；
4) CO2+Ar gas shielded arc welding, the welding current of 150A, the weld gap of 0.5mm, 18V are used
Weldingvoltage, the welding wire elongation of 10mm, the soldering angle of 3mm, with gas stream per minute for 10L
Amount, speed of welding per minute for 400mm are welded；
5) after welding, in weld seam, the diffusibility hydrogen of high-load can produce cold crack, reduces the content of diffusible hydrogen, should
Carrying out post weld heat treatment, heating-up temperature 600 DEG C, air cooling of coming out of the stove after being incubated 2 hours, shove charge workpiece to be prevented becomes
Shape.
Embodiment two
27SiMn steel alloy welding method, it comprises the following steps:
1) ensure being dried of weldment surface before welding, remove to-be-welded pieces surface contaminants；
2) effusion of diffusible hydrogen in welding pre-heating temperature 350 DEG C, beneficially weld metal, it is to avoid produce hydrogen and cause
Crackle, the most also reduces the degree of hardening of weld dimensions；
3) heat range is weld seam every side 150mm, and preheating temperature is preferably measured at the back side of weldment heating surface,
Measure point should from electric arc away from front pad all directions 80mm；
4) CO2+Ar gas shielded arc welding, the welding current of 180A, the weld gap of 1.5mm, 22V are used
Weldingvoltage, the welding wire elongation of 10mm, the soldering angle of 3mm, with gas stream per minute for 15L
Amount, speed of welding per minute for 500mm are welded；
5) after welding, in weld seam, the diffusibility hydrogen of high-load can produce cold crack, reduces the content of diffusible hydrogen, should
Carrying out post weld heat treatment, heating-up temperature 00 DEG C, air cooling of coming out of the stove after being incubated 3 hours, shove charge workpiece to be prevented becomes
Shape.
Embodiment three
27SiMn steel alloy welding method, it comprises the following steps:
1) ensure being dried of weldment surface before welding, remove to-be-welded pieces surface contaminants；
2) effusion of diffusible hydrogen in welding pre-heating temperature 300 DEG C, beneficially weld metal, it is to avoid produce hydrogen and cause
Crackle, the most also reduces the degree of hardening of weld dimensions；
3) heat range is weld seam every side 100mm, and preheating temperature is preferably measured at the back side of weldment heating surface,
Measure point should from electric arc away from front pad all directions 80mm；
4) CO2+Ar gas shielded arc welding, the welding current of 160A, the weld gap of 1mm, 20V are used
Weldingvoltage, the welding wire elongation of 10mm, the soldering angle of 3mm, with gas stream per minute for 12L
Amount, speed of welding per minute for 480mm are welded；
5) after welding, in weld seam, the diffusibility hydrogen of high-load can produce cold crack, reduces the content of diffusible hydrogen, should
Carrying out post weld heat treatment, heating-up temperature 660 DEG C, air cooling of coming out of the stove after being incubated 3 hours, shove charge workpiece to be prevented becomes
Shape.
Claims (2)
1.27SiMn steel alloy welding method, it is characterised in that it comprises the following steps:
1) ensure being dried of weldment surface before welding, remove to-be-welded pieces surface contaminants；
2) effusion of diffusible hydrogen in welding pre-heating temperature 250-350 DEG C, beneficially weld metal, it is to avoid produce
Hydrogen induced cracking, the most also reduces the degree of hardening of weld dimensions；
3) heat range is weld seam every side more than 50-150mm, and preheating temperature is preferably at the back side of weldment heating surface
Measuring, measuring point should be not less than away from 50mm through front pad all directions from electric arc；
4) using CO2+Ar gas shielded arc welding, the welding current of 150-180A, between the weld seam of 0.5-1.5mm
Gap, the weldingvoltage of 18-22V, the welding wire elongation of 10mm, the soldering angle of 3mm, with 10-15L
Gas flow, speed of welding per minute for 400-500mm per minute are welded；
5) after welding, in weld seam, the diffusibility hydrogen of high-load can produce cold crack, reduces the content of diffusible hydrogen, should
Carrying out post weld heat treatment, heating-up temperature 600-700 DEG C, air cooling of coming out of the stove after being incubated 2-3 hour, shove charge to prevent
Workpiece deforms.
27SiMn steel alloy welding method the most according to claim 1, it is characterised in that step 1)
Before welding, preheating temperature is 300 DEG C, post weld heat treatment heating-up temperature 650 DEG C, air cooling of coming out of the stove after being incubated 3 hours,
Shove charge workpiece to be prevented deforms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454935.6A CN105945404A (en) | 2016-06-20 | 2016-06-20 | 27simn alloy steel welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610454935.6A CN105945404A (en) | 2016-06-20 | 2016-06-20 | 27simn alloy steel welding method |
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| CN105945404A true CN105945404A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610454935.6A Pending CN105945404A (en) | 2016-06-20 | 2016-06-20 | 27simn alloy steel welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098171A (en) * | 2017-11-27 | 2018-06-01 | 江苏振光电力设备制造有限公司 | A kind of efficient welding method |
| CN108356417A (en) * | 2018-02-07 | 2018-08-03 | 钢铁研究总院 | A kind of heat treatment method improving high strength and ductility medium managese steel laser weld joint plasticity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268591A (en) * | 2006-03-31 | 2007-10-18 | Komatsu Ltd | Welding method |
| CN101209508A (en) * | 2006-12-27 | 2008-07-02 | 沈阳鼓风机(集团)有限公司 | Welding process of low temperature steel welding body case |
| CN102463406A (en) * | 2010-11-10 | 2012-05-23 | 沈阳鼓风机集团股份有限公司 | Welding process of heat-resistant steel cylindrical housing |
| CN102941399A (en) * | 2012-11-05 | 2013-02-27 | 常州华通焊业股份有限公司 | Gas-shielded welding method for pearlite heat-resistant steel structural members |
| CN104588850A (en) * | 2014-11-27 | 2015-05-06 | 芜湖中集瑞江汽车有限公司 | Welding technology for steel plates |
-
2016
- 2016-06-20 CN CN201610454935.6A patent/CN105945404A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268591A (en) * | 2006-03-31 | 2007-10-18 | Komatsu Ltd | Welding method |
| CN101209508A (en) * | 2006-12-27 | 2008-07-02 | 沈阳鼓风机(集团)有限公司 | Welding process of low temperature steel welding body case |
| CN102463406A (en) * | 2010-11-10 | 2012-05-23 | 沈阳鼓风机集团股份有限公司 | Welding process of heat-resistant steel cylindrical housing |
| CN102941399A (en) * | 2012-11-05 | 2013-02-27 | 常州华通焊业股份有限公司 | Gas-shielded welding method for pearlite heat-resistant steel structural members |
| CN104588850A (en) * | 2014-11-27 | 2015-05-06 | 芜湖中集瑞江汽车有限公司 | Welding technology for steel plates |
Non-Patent Citations (2)
| Title |
|---|
| 中国钢结构协会: "《钢结构制造技术规程》", 30 September 2012, 机械工业出版社 * |
| 印波: "27SiMn焊接工艺的研究", 《机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098171A (en) * | 2017-11-27 | 2018-06-01 | 江苏振光电力设备制造有限公司 | A kind of efficient welding method |
| CN108356417A (en) * | 2018-02-07 | 2018-08-03 | 钢铁研究总院 | A kind of heat treatment method improving high strength and ductility medium managese steel laser weld joint plasticity |
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Application publication date: 20160921 |