CN104999163A - Welding process of steel structures under low-temperature environment - Google Patents
Welding process of steel structures under low-temperature environment Download PDFInfo
- Publication number
- CN104999163A CN104999163A CN201510399332.6A CN201510399332A CN104999163A CN 104999163 A CN104999163 A CN 104999163A CN 201510399332 A CN201510399332 A CN 201510399332A CN 104999163 A CN104999163 A CN 104999163A
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- CN
- China
- Prior art keywords
- welding
- welded
- steel structures
- steel
- steel construction
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/0216—Seam profiling, e.g. weaving, multilayer
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
Abstract
The invention discloses a welding process of steel structures under a low-temperature environment. The welding process is characterized by comprising the following steps: places, to be welded, of the steel structures are grooved; impurities in and around the grooves of the steel structures to be welded are removed, and the gasoline dipping ultrasonic treatment, the drying, the acid washing ultrasonic treatment, the water washing, the anhydrous ethanol dipping ultrasonic treatment and the drying are performed in sequence; the steel structures are placed in a manner of butt joint of the grooves, and are preheated at a temperature of 100-120 DEG C by an electric heating strip after being fixed; process parameters are determined according to the difference of welding modes and corresponding welding specifications to perform the multilayer welding to once finish the continuous welding; and the heat preservation is performed after the welding is finished. The welding process is convenient for implementation and high in welding efficiency, can perform the welding at a low temperature to prevent too fast cooling speed of a base metal heat effect area from generating a quench hardening structure, and prevents the generation of cracks in the internal and on the surface of a welding joint from influencing the welding quality.
Description
Invention field
The present invention relates to a kind of welding procedure, be specifically related to the welding procedure of steel construction under a kind of low temperature environment.
Background technology
Current China has become the maximum steel production and consumption state in the whole world, and steel construction is more and more extensive in the application of China, as the buildings such as factory building, bridge, house, warehouse, gymnasium, exhibition center, supermarket are all extensively using steel construction.Steel construction ductility is good, plasticity, good toughness, has excellent antidetonation and bearing load ability, substantially increases the security reliability of steel building.Steel building is from heavy and light, and foundation cost is low, and construction period is short, has very strong competitive advantage in today that the price of labour power goes up gradually.In addition, the industrialization degree of steel construction is high, and manufacturing cycle is shorter, and precision controlling is good, can meet the requirement of hypervelocity and super span in addition, and improve space availability ratio, steel construction obtains tremendous development in building trade.
In the winter time or construct to structural steelwork in the place of temperature cold time, because temperature is low, some steel can because low temperature becomes easy embrittlement, also the cooling velocity of mother metal heat affected area in welding process is made to accelerate, be easy to produce hardened structure, very easily inner at welding point and surface cracks, and affects welding quality, serious words can cause engineering accident, cause serious loss.
Summary of the invention
For solving the problem, the invention provides the welding procedure of steel construction under a kind of low temperature environment.
The technical solution used in the present invention is:
Under low temperature environment, a welding procedure for steel construction, is characterized in that, comprises the following steps:
(1) at steel construction place to be welded bevel, groove type adopts V-type or double V-shaped groove according to the thickness of steel construction, and bevel angle is 55 °-65 °, and root face is 0-2mm;
(2) remove the foreign material at steel groove to be welded and around place, and carry out gasoline successively and soak ultrasonic wave process, dry up, the process of pickling ultrasonic wave, water flushing, the process of soaked in absolute ethyl alcohol ultrasonic wave, to dry up;
(3) steel are pressed groove docking to place, groove gap 1-2mm, after using fixture fixing, adopt heat tape preheating at 100-120 DEG C of temperature;
(4) according to the difference of welding manner, according to corresponding welding conditions determination technological parameter, welding direction principle according to first overhead welding, rear vertical position welding, again downhand welding carries out multilayer welding, and disposable continuous welding completes, and should control interlayer temperature at 160-200 DEG C in continuous welding process;
(5) welded rear logical protective gas protection weld seam 3-4 minute, wrapped multiple heat preservation rock in welded joints, guarantees that cooling rate is no more than 8 DEG C/min, and be namely cooled to the time of 0 DEG C to be not less than 15min, heat preservation rock is removed after remaining into second day.
Further, welding the welding rod selected is hydrogen controlled electrode, before using at 350-380 DEG C of temperature drying time 1.5-2h, and slow cooling is positioned in the incubator of 110-120 DEG C stand-by after the drying.
Beneficial effect of the present invention:
Welding procedure of the present invention is implemented convenient, and welding efficiency is high, can weld at low temperatures, prevent the cooling velocity of mother metal heat affected area from accelerating, hardened structure can not be produced because cooling velocity is too fast, avoid and crack in welding point inside and surface, affect welding quality.
Detailed description of the invention
The welding procedure of steel construction under a kind of low temperature environment of the present invention, is characterized in that, comprise the following steps:
(1) at steel construction place to be welded bevel, groove type adopts V-type or double V-shaped groove according to the thickness of steel construction, and bevel angle is 55 °-65 °, and root face is 0-2mm;
(2) remove the foreign material at steel groove to be welded and around place, and carry out gasoline successively and soak ultrasonic wave process, dry up, the process of pickling ultrasonic wave, water flushing, the process of soaked in absolute ethyl alcohol ultrasonic wave, to dry up;
(3) steel are pressed groove docking to place, groove gap 1-2mm, after using fixture fixing, adopt heat tape preheating at 100-120 DEG C of temperature;
(4) according to the difference of welding manner, according to corresponding welding conditions determination technological parameter, welding direction principle according to first overhead welding, rear vertical position welding, again downhand welding carries out multilayer welding, and disposable continuous welding completes, and should control interlayer temperature at 160-200 DEG C in continuous welding process;
(5) welded rear logical protective gas protection weld seam 3-4 minute, wrapped multiple heat preservation rock in welded joints, guarantees that cooling rate is no more than 8 DEG C/min, and be namely cooled to the time of 0 DEG C to be not less than 15min, heat preservation rock is removed after remaining into second day.
Further, welding the welding rod selected is hydrogen controlled electrode, before using at 350-380 DEG C of temperature drying time 1.5-2h, and slow cooling is positioned in the incubator of 110-120 DEG C stand-by after the drying.
Claims (2)
1. the welding procedure of steel construction under low temperature environment, is characterized in that, comprise the following steps:
(1) at steel construction place to be welded bevel, groove type adopts V-type or double V-shaped groove according to the thickness of steel construction, and bevel angle is 55 °-65 °, and root face is 0-2mm;
(2) remove the foreign material at steel groove to be welded and around place, and carry out gasoline successively and soak ultrasonic wave process, dry up, the process of pickling ultrasonic wave, water flushing, the process of soaked in absolute ethyl alcohol ultrasonic wave, to dry up;
(3) steel are pressed groove docking to place, groove gap 1-2mm, after using fixture fixing, adopt heat tape preheating at 100-120 DEG C of temperature;
(4) according to the difference of welding manner, according to corresponding welding conditions determination technological parameter, welding direction principle according to first overhead welding, rear vertical position welding, again downhand welding carries out multilayer welding, and disposable continuous welding completes, and should control interlayer temperature at 160-200 DEG C in continuous welding process;
(5) welded rear logical protective gas protection weld seam 3-4 minute, wrapped multiple heat preservation rock in welded joints, guarantees that cooling rate is no more than 8 DEG C/min, and be namely cooled to the time of 0 DEG C to be not less than 15min, heat preservation rock is removed after remaining into second day.
2. the welding procedure of steel construction under a kind of low temperature environment according to claim 1, it is characterized in that: welding the welding rod selected is hydrogen controlled electrode, before using at 350-380 DEG C of temperature drying time 1.5-2h, and slow cooling is positioned in the incubator of 110-120 DEG C stand-by after the drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510399332.6A CN104999163A (en) | 2015-07-09 | 2015-07-09 | Welding process of steel structures under low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510399332.6A CN104999163A (en) | 2015-07-09 | 2015-07-09 | Welding process of steel structures under low-temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104999163A true CN104999163A (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510399332.6A Pending CN104999163A (en) | 2015-07-09 | 2015-07-09 | Welding process of steel structures under low-temperature environment |
Country Status (1)
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| CN (1) | CN104999163A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825961A (en) * | 2016-12-22 | 2017-06-13 | 安徽伟宏钢结构集团股份有限公司 | A kind of bridge steel structure cracking resistance welding procedure |
| CN108723559A (en) * | 2018-06-29 | 2018-11-02 | 张维秀 | A kind of steel-structure thick plate welding construction method under low-temperature environment |
| CN110202242A (en) * | 2019-06-04 | 2019-09-06 | 邵大松 | A kind of stress Calculation Method of Temperature Field during welding for steel structure at low ambient temperatures |
| CN112894094A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Welding process for cover plate production |
| CN114346380A (en) * | 2022-02-18 | 2022-04-15 | 上海绿地建设(集团)有限公司 | Welding process of high-strength steel structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08276272A (en) * | 1995-04-04 | 1996-10-22 | Nippon Steel Corp | Two-electrode gas shielded arc welding method of austenitic stainless steel |
| CN102363238A (en) * | 2011-08-15 | 2012-02-29 | 南京钢铁股份有限公司 | Thick plate submerged arc welding technology for low-temperature maritime engineering |
| CN102615381A (en) * | 2012-04-05 | 2012-08-01 | 永升建设集团有限公司 | Welding method for steel structure in environment of -15 DEG C to 35 DEG C |
| CN103464865A (en) * | 2013-07-24 | 2013-12-25 | 武汉一冶钢结构有限责任公司 | Equal-intensity matching welding rod manual welding method for P690QL1 high-intensity steel |
-
2015
- 2015-07-09 CN CN201510399332.6A patent/CN104999163A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08276272A (en) * | 1995-04-04 | 1996-10-22 | Nippon Steel Corp | Two-electrode gas shielded arc welding method of austenitic stainless steel |
| CN102363238A (en) * | 2011-08-15 | 2012-02-29 | 南京钢铁股份有限公司 | Thick plate submerged arc welding technology for low-temperature maritime engineering |
| CN102615381A (en) * | 2012-04-05 | 2012-08-01 | 永升建设集团有限公司 | Welding method for steel structure in environment of -15 DEG C to 35 DEG C |
| CN103464865A (en) * | 2013-07-24 | 2013-12-25 | 武汉一冶钢结构有限责任公司 | Equal-intensity matching welding rod manual welding method for P690QL1 high-intensity steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825961A (en) * | 2016-12-22 | 2017-06-13 | 安徽伟宏钢结构集团股份有限公司 | A kind of bridge steel structure cracking resistance welding procedure |
| CN108723559A (en) * | 2018-06-29 | 2018-11-02 | 张维秀 | A kind of steel-structure thick plate welding construction method under low-temperature environment |
| CN110202242A (en) * | 2019-06-04 | 2019-09-06 | 邵大松 | A kind of stress Calculation Method of Temperature Field during welding for steel structure at low ambient temperatures |
| CN112894094A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Welding process for cover plate production |
| CN114346380A (en) * | 2022-02-18 | 2022-04-15 | 上海绿地建设(集团)有限公司 | Welding process of high-strength steel structure |
| CN114346380B (en) * | 2022-02-18 | 2022-10-28 | 上海绿地建设(集团)有限公司 | Welding process of high-strength steel structure |
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Application publication date: 20151028 |