CN105983761A - High-strength steel welding process - Google Patents
High-strength steel welding process Download PDFInfo
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- CN105983761A CN105983761A CN201510049346.5A CN201510049346A CN105983761A CN 105983761 A CN105983761 A CN 105983761A CN 201510049346 A CN201510049346 A CN 201510049346A CN 105983761 A CN105983761 A CN 105983761A
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Abstract
The invention discloses a high-strength steel welding process. The high-strength steel welding process is characterized in that the high-strength steel welding process aiming at downhand butt welding of high-strength steel plates with base metal being Q420 and thickness being 6mm includes process parameters and steps: (1) preparation; (2) welding grooves; (3) preheating temperature; (4) welding temperature; (5) shielding gas; (6) welding sequence; (7) welding materials; (8) welding parameters. The high-strength steel welding process has advantages of strict and reasonable control of parameters of each stage, normative procedures, reduction of welding stress and deformation and improvement of mechanical properties after welding.
Description
Technical field
The invention belongs to welding procedure field, specifically a kind of high strength steel welding procedure.
Background technology
High strength steel has the features such as high intensity, high tenacity and good combination property, is widely used at industrial circle.It is known that the extensively application of any structural metallic materials depends not only on the performance characteristics of himself, and also rely on the progress of solder technology.At present; high strength steel welding mainly uses the welding method that submerged-arc welding, gas shielded arc welding etc. are traditional; though having the advantages such as technical maturity, production cost are low, but have that thermal weld stress amount is big, deformation is big, joint is brittle, be easily generated defect and the problem such as welding production efficiency is low.Along with progress and the development of national economy of science and technology, welding quality, production efficiency and the product quality of high strength steel is had higher requirement.Traditional welding method the most can not meet the requirement of welding quality and the production efficiency improved constantly and use traditional welding method by time integrally welded for stainless steel pipes, its heat input is wayward, it is easily caused the poor welding quality of product, then poor mechanical property.
Summary of the invention
The deficiency existed in view of prior art, it is an object of the invention to provide a kind of high strength steel welding procedure, controls each stage process parameter by strict, it is achieved improve mechanical property after pipeline welding.
The technical scheme realizing the object of the invention is as follows:
A kind of high strength steel welding procedure, it is characterised in that be Q420 for mother metal, thickness is the flat butt welding of 6mm high-strength steel sheet, including following technological parameter and step:
(1) preparation: weldment group to before thoroughly should remove groove in and both sides 10～15mm in the range of the foreign material such as oxide skin, greasy dirt, rust, until exposing metallic luster,
(2) bevel for welding
: using V type groove, butting grooves angle is 60～70 °, fusion penetration 3～4mm, and front melts wide 3～6mm, back bead width 2～3mm, topside height 0.5～1mm, root reinforcement 0.5～1mm；
(3) preheating temperature: preheating temperature reaches 200～250 DEG C and starts welding；
(4) welding temperature
: during welding, between road, temperature should control at 100 DEG C～120 DEG C, uses point thermometer to measure at any time；
(5) protective gas: use 99.99%CO2, protects throughput 15～18L/min；
(6) welding sequence
: welding method uses SMAW, to fill up the groove in cross section；Weld seam uses carbon arc air gouging back chipping, then implements reverse side welding, during striking, first with workpiece, torch neck is kept normal distance, and makes welding wire termination away from surface of the work 2～4mm；
(7) welding material: use the 3Y welding wire with structural steel yield strength ad eundem or welding rod；
(8) welding parameter
: welding current 80～110A, arc voltage 22～24V, speed of welding 100～150mm/min, electrical characteristics are DC reverse connection.
A kind of high strength steel welding procedure of the present invention has technique each stage strict conservative control of parameter, standard process, reduces welding stress and deformation, thus improves the mechanical property after welding.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and its operating procedure is as follows:
A kind of high strength steel welding procedure, is Q420 for mother metal, and thickness is the flat butt welding of 6mm high-strength steel sheet, including following technological parameter and step:
(1) preparation: weldment group to before thoroughly should remove groove in and both sides 10～15mm in the range of the foreign material such as oxide skin, greasy dirt, rust, until exposing metallic luster,
(2) bevel for welding
: using V type groove, butting grooves angle is 60～70 °, fusion penetration 3～4mm, and front melts wide 3～6mm, back bead width 2～3mm, topside height 0.5～1mm, root reinforcement 0.5～1mm；
(3) preheating temperature: preheating temperature reaches 200～250 DEG C and starts welding；
(4) welding temperature
: during welding, between road, temperature should control at 100 DEG C～120 DEG C, uses point thermometer to measure at any time；
(5) protective gas: use 99.99%CO2, protects throughput 15～18L/min；
(6) welding sequence
: welding method uses SMAW, to fill up the groove in cross section；Weld seam uses carbon arc air gouging back chipping, then implements reverse side welding, during striking, first with workpiece, torch neck is kept normal distance, and makes welding wire termination away from surface of the work 2～4mm；
(7) welding material: use the 3Y welding wire with structural steel yield strength ad eundem or welding rod；
(8) welding parameter
: welding current 80～110A, arc voltage 22～24V, speed of welding 100～150mm/min, electrical characteristics are DC reverse connection.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be at the protection domain being defined in the patent claims the most on the basis of existing technology by logic minute analysis, reasoning or the available technical scheme of limited experiment.
Claims (1)
1. a high strength steel welding procedure, it is characterised in that be Q420 for mother metal, thickness is the flat butt welding of 6mm high-strength steel sheet, including following technological parameter and step:
(1) preparation: weldment group to before thoroughly should remove groove in and both sides 10～15mm in the range of the foreign material such as oxide skin, greasy dirt, rust, until exposing metallic luster,
(2) bevel for welding: using V type groove, butting grooves angle is 60～70 °, fusion penetration 3～4mm, front melts wide 3～6mm, back bead width 2～3mm, topside height 0.5～1mm, root reinforcement 0.5～1mm；
(3) preheating temperature: preheating temperature reaches 200～250 DEG C and starts welding；
(4) welding temperature: during welding, between road, temperature should control at 100 DEG C
～120 DEG C, use point thermometer to measure at any time；
(5) protective gas: use 99.99%CO2, protects throughput 15～18L/min
；
(6) welding sequence: welding method uses SMAW, to fill up the groove in cross section；Weld seam uses carbon arc air gouging back chipping, then implements reverse side welding
, during striking, first torch neck is kept normal distance with workpiece, and makes welding wire termination away from surface of the work 2～4mm；
(7) welding material: use the 3Y welding wire with structural steel yield strength ad eundem or welding rod
；
(8) welding parameter: welding current 80～110A, arc voltage 22～24V, speed of welding 100～150mm/min, electrical characteristics are DC reverse connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049346.5A CN105983761A (en) | 2015-01-31 | 2015-01-31 | High-strength steel welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049346.5A CN105983761A (en) | 2015-01-31 | 2015-01-31 | High-strength steel welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983761A true CN105983761A (en) | 2016-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510049346.5A Pending CN105983761A (en) | 2015-01-31 | 2015-01-31 | High-strength steel welding process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270951A (en) * | 2016-08-30 | 2017-01-04 | 鞍钢建设集团有限公司 | A kind of welding method of building structural steel Q420GJC |
| CN109352142A (en) * | 2018-10-12 | 2019-02-19 | 广州增立钢管结构股份有限公司 | A kind of GMAW-Ar welding method of Q420B steel plate |
| CN110640278A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Terminal crack prevention process for Q420 high-strength steel flux copper liner method submerged-arc welding |
| CN110640279A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Welding flux copper gasket method submerged-arc welding process for Q420 high-strength steel thick plate |
| CN110877699A (en) * | 2019-11-19 | 2020-03-13 | 沪东中华造船(集团)有限公司 | Method for welding reinforcing ribs on reverse side of LNG ship cargo tank hull |
-
2015
- 2015-01-31 CN CN201510049346.5A patent/CN105983761A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270951A (en) * | 2016-08-30 | 2017-01-04 | 鞍钢建设集团有限公司 | A kind of welding method of building structural steel Q420GJC |
| CN109352142A (en) * | 2018-10-12 | 2019-02-19 | 广州增立钢管结构股份有限公司 | A kind of GMAW-Ar welding method of Q420B steel plate |
| CN110640278A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Terminal crack prevention process for Q420 high-strength steel flux copper liner method submerged-arc welding |
| CN110640279A (en) * | 2019-09-30 | 2020-01-03 | 广州黄船海洋工程有限公司 | Welding flux copper gasket method submerged-arc welding process for Q420 high-strength steel thick plate |
| CN110640279B (en) * | 2019-09-30 | 2021-10-26 | 广州黄船海洋工程有限公司 | Welding flux copper gasket method submerged-arc welding process for Q420 high-strength steel thick plate |
| CN110877699A (en) * | 2019-11-19 | 2020-03-13 | 沪东中华造船(集团)有限公司 | Method for welding reinforcing ribs on reverse side of LNG ship cargo tank hull |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
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| WD01 | Invention patent application deemed withdrawn after publication |