CN106825961A - A kind of bridge steel structure cracking resistance welding procedure - Google Patents
A kind of bridge steel structure cracking resistance welding procedure Download PDFInfo
- Publication number
- CN106825961A CN106825961A CN201611195725.6A CN201611195725A CN106825961A CN 106825961 A CN106825961 A CN 106825961A CN 201611195725 A CN201611195725 A CN 201611195725A CN 106825961 A CN106825961 A CN 106825961A
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- CN
- China
- Prior art keywords
- welding
- steel structure
- cracking resistance
- groove
- bridge steel
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- 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.)
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
-
- 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
Abstract
The present invention discloses a kind of bridge steel structure cracking resistance welding procedure, comprises the following steps：（1）It is the steel substrate that 420 440MPa, tensile strength are 530 570MPa to use yield strength, and welding wire bakees 1.5 2.1h at 300 320 DEG C, and the welding wire after baking is placed in 110 130 DEG C of incubator, standby；（2）Welding groove, 30 ° of bevel angle 25 °, the 2mm of groove depth 1, the 350A of electric current 320 during welding, the 24V of weldingvoltage 20, the 20cm/min of speed of welding 16 are cut using flame cutting method.Bridge steel structure welding procedure of the present invention is simple, and workable, weld seam has excellent cracking resistance, anti-fatigue performance, and durability is improved；Being incubated 1h under 180 DEG C of temperature conditionss after present invention process welding carries out dehydrogenation, the good mechanical performance of welding point.
Description
Technical field
The invention belongs to welding for steel structure technical field, specifically a kind of bridge steel structure cracking resistance welding procedure.
Background technology
Have that deadweight is light, construction is fast due to steel construction, intensity high, cycle is short, low cost, when taking up an area small, recyclable, construction
The advantages of small on surrounding enviroment influence, it is widely used in house construction.Large area of the steel construction in highway bridge in recent years
Using bridge steel structure durability, the research of anti-fatigue performance increasingly cause construction and the concern of maintenance management unit, bridge
The welding quality control of Steel Structure Weld is the important and key of bridge steel structure durability and anti-fatigue performance.
The steel construction pattern that current science of bridge building is applied mainly has head tower, tubular arch, steel reinforced concrete bondbeam, steel box-girder
Bolted and welded structure or all welded construction are typically used Deng, bridge steel structure, not only the length of weld seam is more long, and welding line structure form
Also it is more, therefore, key of the weldquality into influence steel construction total quality.
The content of the invention
It is an object of the invention to provide a kind of bridge steel structure cracking resistance welding procedure, welding procedure is simple, operability
By force, weld seam has excellent cracking resistance, anti-fatigue performance, and durability is improved.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of bridge steel structure cracking resistance welding procedure, comprises the following steps：
（1）It is the steel substrate of 530-570MPa for 420-440MPa, tensile strength to use yield strength, and welding wire is at 300-320 DEG C
Lower baking 1.5-2.1h, the welding wire after baking is placed in 110-130 DEG C of incubator, standby；
（2）Welding groove, 25 ° -30 ° of bevel angle, groove depth 1-2mm, electric current during welding are cut using flame cutting method
320-350A, weldingvoltage 20-24V, speed of welding 16-20cm/min；
（3）Welded using downhand position, welding bead on the same plane, is not filled from low to high, slab multilayer welding is scooped out continuously
Welding, the joint of multi-pass welding staggers, and multilayer welding makes step in end, and welding line structure is welded since groove side；
（4）It is put into after welding under 150-180 DEG C of temperature conditionss and is incubated 1-1.2h, is finally putting under 110-120 DEG C of temperature conditionss and protects
Warm 0.6-1.2h.
Step（2）In, the use flame cutting method cutting welding groove, 28 ° of bevel angle, groove depth 1.5mm,
Electric current 335A during welding, weldingvoltage 22V, speed of welding 18cm/min.
Beneficial effects of the present invention：Bridge steel structure welding procedure of the present invention is simple, and workable, weld seam has excellent
Cracking resistance, anti-fatigue performance, durability is improved；Being incubated 1h under 180 DEG C of temperature conditionss after present invention process welding is carried out
Dehydrogenation, the good mechanical performance of welding point.
Specific embodiment
Embodiment 1：
A kind of bridge steel structure cracking resistance welding procedure, comprises the following steps：
（1）It is the steel substrate of 530-570MPa for 420-440MPa, tensile strength to use yield strength, and welding wire is at 300-320 DEG C
Lower baking 1.5-2.1h, the welding wire after baking is placed in 110-130 DEG C of incubator, standby；
（2）Using flame cutting method cut welding groove, 28 ° of bevel angle, groove depth 1.5mm, electric current 335A during welding,
Weldingvoltage 22V, speed of welding 18cm/min；
（3）Welded using downhand position, welding bead on the same plane, is not filled from low to high, slab multilayer welding is scooped out continuously
Welding, the joint of multi-pass welding staggers, and multilayer welding makes step in end, and welding line structure is welded since groove side；
（4）It is put into after welding under 150-180 DEG C of temperature conditionss and is incubated 1-1.2h, is finally putting under 110-120 DEG C of temperature conditionss and protects
Warm 0.6-1.2h.
Claims (2)
1. a kind of bridge steel structure cracking resistance welding procedure, it is characterised in that comprise the following steps：
（1）It is the steel substrate of 530-570MPa for 420-440MPa, tensile strength to use yield strength, and welding wire is at 300-320 DEG C
Lower baking 1.5-2.1h, the welding wire after baking is placed in 110-130 DEG C of incubator, standby；
（2）Welding groove, 25 ° -30 ° of bevel angle, groove depth 1-2mm, electric current during welding are cut using flame cutting method
320-350A, weldingvoltage 20-24V, speed of welding 16-20cm/min；
（3）Welded using downhand position, welding bead on the same plane, is not filled from low to high, slab multilayer welding is scooped out continuously
Welding, the joint of multi-pass welding staggers, and multilayer welding makes step in end, and welding line structure is welded since groove side；
（4）It is put into after welding under 150-180 DEG C of temperature conditionss and is incubated 1-1.2h, is finally putting under 110-120 DEG C of temperature conditionss and protects
Warm 0.6-1.2h.
2. bridge steel structure cracking resistance welding procedure according to claim 1, it is characterised in that step（2）In, it is described using fire
Flame cutting method cutting welding groove, 28 ° of bevel angle, groove depth 1.5mm, electric current 335A during welding, weldingvoltage 22V,
Speed of welding 18cm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195725.6A CN106825961A (en) | 2016-12-22 | 2016-12-22 | A kind of bridge steel structure cracking resistance welding procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195725.6A CN106825961A (en) | 2016-12-22 | 2016-12-22 | A kind of bridge steel structure cracking resistance welding procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106825961A true CN106825961A (en) | 2017-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611195725.6A Pending CN106825961A (en) | 2016-12-22 | 2016-12-22 | A kind of bridge steel structure cracking resistance welding procedure |
Country Status (1)
| Country | Link |
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| CN (1) | CN106825961A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318254A (en) * | 2008-07-01 | 2008-12-10 | 武汉钢铁(集团)公司 | Thick steel plate buried arc welding method for high-strength bridge |
| CN104999163A (en) * | 2015-07-09 | 2015-10-28 | 安徽金阳金属结构工程有限公司 | Welding process of steel structures under low-temperature environment |
| CN105397319A (en) * | 2015-12-15 | 2016-03-16 | 安徽伟宏钢结构集团股份有限公司 | Welding process for steel bridge structure |
-
2016
- 2016-12-22 CN CN201611195725.6A patent/CN106825961A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318254A (en) * | 2008-07-01 | 2008-12-10 | 武汉钢铁(集团)公司 | Thick steel plate buried arc welding method for high-strength bridge |
| CN104999163A (en) * | 2015-07-09 | 2015-10-28 | 安徽金阳金属结构工程有限公司 | Welding process of steel structures under low-temperature environment |
| CN105397319A (en) * | 2015-12-15 | 2016-03-16 | 安徽伟宏钢结构集团股份有限公司 | Welding process for steel bridge structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |
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| RJ01 | Rejection of invention patent application after publication |