CN104999186A - Thick steel plate low-temperature environment welding technology - Google Patents
Thick steel plate low-temperature environment welding technology Download PDFInfo
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- CN104999186A CN104999186A CN201510393673.2A CN201510393673A CN104999186A CN 104999186 A CN104999186 A CN 104999186A CN 201510393673 A CN201510393673 A CN 201510393673A CN 104999186 A CN104999186 A CN 104999186A
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- welding
- temperature
- steel plate
- weld seam
- inspection
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
-
- 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)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a thick steel plate low-temperature environment welding technology, which comprises the following steps: a safe scaffold and welding materials are prepared; components are mounted and adopted, and the whole structure installation is subjected to inspection and correction; after the structure installation is corrected in place, welding points are symmetrically arranged; grooves are inspected; heating zones at the grooves are preheated by preheating temperature; edge temperature measuring points of the grooves are subjected to temperature measurement by using a thermodetector; after the temperature is determined correct, welding is formally carried out; in the welding process, the thermodetector is used for measuring the temperature in the front and rear directions and the side faces of the welding points at any time; postweld heat treatment is carried out; and the welding regions which are subjected to postweld heat treatment are subjected to warming work. According to the invention, the occurrence of additional deformation caused by the dead weights of the components in the welding process can be effectively prevented; the welding regions are effectively protected; the welding quality of the welding regions is guaranteed; and the requirements of customers can be well met.
Description
Technical field
The present invention relates to a kind of welding procedure, specifically a kind of for steel plate low temperature environment welding procedure.
Background technology
Steel building is a kind of novel building system, and it relates to the industry boundary line between real estate, building industry, Metallurgy Industry, and set becomes a new industrial system, steel building system that insider generally has an optimistic view of that Here it is.Steel building compares traditional concrete construction, and instead of armored concrete with steel plate or shaped steel, intensity is higher, and shock resistance is better, and can batch production make due to component, and in-site installation, thus substantially reduces the duration.Formally due to it, there is many characteristics, be thus subject to the favor of all multiple enterprises gradually.
Steel building is while having above-mentioned many merits, very large difficulty is there is in it in the process of construction, ratio in current building field shared by steel building is little, its technology of building is ripe not enough, thus be no matter the design from designer, or all can some problems of existence more or less in the work progress of reality, such as: because steel building is mainly by welding fabrication, although steel construction itself can adapt to various temperature, but it is when welding, the process of whole welding but has very strict requirement to temperature, temperature is too low, steel plate after preheating can cool fast, namely allow to by the fastest speed, contact is soldered, quick cooling can have a strong impact on the quality of welding, increase its danger in use, thus in arrangement and method for construction and the improvement that technically needs of steel building.
Summary of the invention
Goal of the invention: the object of the invention is to solve the deficiencies in the prior art, provides a kind of steel plate low temperature environment welding procedure.
Technical scheme: in order to realize above object, a kind of steel plate low temperature environment welding procedure of the present invention, it comprises the following steps:
(1): first preparation safe construction frame and welding material, and the inspection before they are welded;
(2): in the process of Components installation, adopt temporary support or structure girder to be fixed, and arrange the location-plate of some in the joint of component and temporary support or structure girder, and total is installed carry out inspections correction;
(3): after structure installment correction puts in place, be arranged symmetrically with pad;
(4): groove is checked, if check defective, reexamine after groove is repaired, record inspection of edge preparation record in the process, after qualified on inspection, carry out groove (2) removing surface;
(5): according to the requirement of weld seam preheat temperature table and weld seam interlayer temperature table, to the heating tape at groove place, preheating is carried out to preheat temperature, adopt the method with preheating if desired, ensure preheat temperature and interlayer temperature;
(6): temperature measurer is parallel on two straight lines of Weld pipe mill, thermometric is carried out to bevelled edge point for measuring temperature, and record is carried out to surveyed temperature;
(7): after temperature confirmation is errorless, formally start the welding carrying out steel plate, the surface electrical heating of welding position is at the back side of welding portion, homogeneous heating, and heating region is more than or equal to 100mm;
(8): in above-mentioned welding process, temperature measurer will carry out the measurement of temperature in the fore-and-aft direction of butt welding contact and side at any time, then surveyed preheat temperature and interlayer temperature is checked; When environment temperature is lower than 0 DEG C, do not need the welding point of preheating the mother metal in the region of joint should be preheated to and be greater than 21 DEG C;
(9): after steel plate has welded, within the scope of 2-3 times of weld seam both sides thickness of slab, post weld heat treatment is carried out immediately, to the steel plate of more than 36mm, heating-up temperature at 250 ~ 350 DEG C, and keeps 1 ~ 2 hour, simultaneously at 1 meter of at weld seam two ends, be provided with sealing device;
(10): carry out warming to the position employing completing post weld heat treatment is heat insulating material formed to it, after weld seam slowly cools, carry out the process of postwelding.
Welding material of the present invention comprises carbon dioxide and ultrasonic inspection couplant, wherein, opens valve the water in bottle is drained and can be used after the gas cylinder of described carbon dioxide should be inverted 24 hours before work; Meanwhile, in bottle, the high pressure of gas should be more than or equal to 1MPa, and checks the instruction on gas gauge, then check gas flowmeter and adjusting gas flow, and described ultrasonic inspection couplant adopts the ultrasonic inspection couplant of environmental protection anti-freeze type.
The concrete numerical value of weld seam preheat temperature table of the present invention and weld seam interlayer temperature table following (t is the thickness of slab of the most thick parts of joint):
(1) weld seam preheat temperature table:
(2) weld seam interlayer temperature table:
During weld seam heating of the present invention, the width of every side should be greater than more than 1.5 times of weldment thickness, and is more than or equal to 100mm.
Temperature measurer of the present invention adopts far infrared temperature measurement instrument and infrared ray point thermometer.
Insulation material of the present invention is heat preservation rock.
The concrete steps of after welding treatment of the present invention are as follows:
(1), after having welded, arrange and complete welding procedure record, and self-inspection is carried out to whole process;
(2) check that outward appearance and the UT of weld seam check, once pinpoint the problems in the process checked, alignment is timely reprocessed, and carries out inspection again;
(3) check no problem after, confirm that welding terminates, and welding place to be cleared up.
Beneficial effect: steel plate low temperature environment welding procedure of the present invention, has the following advantages:
1, a kind of steel plate low temperature environment welding procedure of the present invention, when the installation of component, it adopts temporary support or structure girder to be fixed, and the location-plate of some is arranged in joint, and correction confirm errorless after again distribution pad is set, effectively prevent the generation of the additional deformation caused because of member dead weight in welding process; Meanwhile, at 1 meter of at weld seam two ends, be provided with sealing device, the snow-broth after avenging can be prevented the erosion of welding region, thus effectively protect welding region, ensure that the welding quality of welding region, allow it better meet the demand of client.
2, steel plate low temperature environment welding procedure of the present invention, it detects pad and the temperature near it timely by far infrared temperature measurement instrument and infrared ray point thermometer in welding process, can be good at controlling the temperature in whole welding process, simultaneously, heated by electrical heating and fire to guarantee that weld seam preheat temperature and weld seam interlayer temperature can reach the standard of operation, thus not only well solve the Welding Problems of low temperature environment, also ensure that the quality of welding, improve the security of whole steel construction.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of groove in the present invention;
Fig. 3 is structural representation heat insulating material formed described in the present invention;
In figure: component-1, groove-2, heating tape-3, temperature measurer-4, weld seam-5, sealing device-6, heat insulating material formed-7.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further.
Embodiment
A kind of steel plate low temperature environment welding procedure as shown in Figure 1, Figure 2 and Figure 3, comprises the following steps:
(1): first preparation safe construction frame and welding material, and the inspection before they are welded;
(2): in the process that component 1 is installed, adopt temporary support or structure girder to be fixed, and arrange the location-plate of some in the joint of component 1 and temporary support or structure girder, and to total install and carry out inspections correction;
(3): after structure installment correction puts in place, be arranged symmetrically with pad;
(4): check groove 2, if check defective, reexamine after groove 2 is repaired, record groove 2 inspection record in the process, after qualified on inspection, carry out groove 2 removing surface;
(5): carry out preheating according to the heating tape 3 of the preheat temperature that weld seam preheat temperature table and weld seam interlayer temperature table require to groove 2 place, adopt the method with preheating if desired, ensure preheat temperature and interlayer temperature;
(6): temperature measurer 4 is parallel on two straight lines at weld seam 5 center, thermometric is carried out to bevelled edge point for measuring temperature, and record is carried out to surveyed temperature;
(7): after temperature confirmation is errorless, formally start the welding carrying out steel plate, the surface electrical heating of welding position is at the back side of welding portion, homogeneous heating, and heating region is more than or equal to 100mm;
(8): in above-mentioned welding process, temperature measurer 4 will carry out the measurement of temperature in the fore-and-aft direction of butt welding contact and side at any time, then surveyed preheat temperature and interlayer temperature is checked; When environment temperature is lower than 0 DEG C, do not need the welding point of preheating the mother metal in the region of joint should be preheated to and be greater than 21 DEG C;
(9): after steel plate has welded, within the scope of 2-3 times of weld seam 5 both sides thickness of slab, post weld heat treatment is carried out immediately, to the steel plate of more than 36mm, heating-up temperature at 250 ~ 350 DEG C, and keeps 1 ~ 2 hour, simultaneously at 1 meter of at weld seam 5 two ends, be provided with sealing device 6;
(10): adopt heat insulating material formed 7 to carry out warming to it, after weld seam 5 slowly cools to the position completing post weld heat treatment;
(11): arrange and complete welding procedure record, and self-inspection is carried out to whole process;
(12): check that the outward appearance of weld seam 5 and UT check, once pinpoint the problems in the process checked, alignment is timely reprocessed, and carries out inspection again;
(13) check no problem after, confirm that welding terminates, and welding place to be cleared up.
Welding material described in the present embodiment comprises carbon dioxide and ultrasonic inspection couplant, wherein, opens valve the water in bottle is drained and can be used after the gas cylinder of described carbon dioxide should be inverted 24 hours before work; Meanwhile, in bottle, the high pressure of gas should be more than or equal to 1MPa, and checks the instruction on gas gauge, then check gas flowmeter and adjusting gas flow, and described ultrasonic inspection couplant adopts the ultrasonic inspection couplant of environmental protection anti-freeze type.
The concrete numerical value of the weld seam preheat temperature table described in the present embodiment and weld seam interlayer temperature table following (t is the thickness of slab of the most thick parts of joint):
(1) weld seam preheat temperature table:
(2) weld seam interlayer temperature table:
During the heating of weld seam described in the present embodiment, the width of every side should be greater than more than 1.5 times of weldment thickness, and is more than or equal to 100mm.
Steel plate low temperature environment welding procedure described in the present embodiment, it is also provided with welding safeguard procedures in whole work progress, and concrete safeguard procedures are as follows:
1), draught exclusion device is welded.First operating platform position φ 12 reinforcement welding clamping rings need be set up at truss or steel cylinder shaft, φ 48x3.5 scaffold tubes is passed annulus and shaft or chord member of truss fit tightly, to encorbelment vertical rod and in length and breadth to horizon bar from fixing scaffold tubes again, wooden springboard laid by bottom level bar.Platform four limit arranges scaffold tubes and serves as guard rail, and rail height is not less than 1.2m.Establish protective cloth at the outer layback of scaffold tubes, protective cloth and the colligation of scaffold tubes iron wire are fixed.
2) gas flow of welding, is controlled.According to the change of welding work layer wind speed, the shield gas flow rate that gas protects weldering suitably adjusts.
3), warming measure.Suddenly snow in welding process, welding should be stopped immediately and adopt the heat preservation rock thickeied to carry out insulation slow cooling, avenge and want butt welded seam to be preheated to interlayer temperature after stopping can to continue welding.
Above-described embodiment is only not used in for illustration of the present invention and limits the scope of the invention, and after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention all falls within the application's claims limited range.
Claims (7)
1. a steel plate low temperature environment welding procedure, is characterized in that: comprise the following steps:
(1): first preparation safe construction frame and welding material, and the inspection before they are welded;
(2): in the process that component (1) is installed, adopt temporary support or structure girder to be fixed, and arrange the location-plate of some in the joint of component (1) and temporary support or structure girder, and total is installed carry out inspections correction;
(3): after structure installment correction puts in place, be arranged symmetrically with pad;
(4): groove (2) is checked, if check defective, reexamine after groove (2) is repaired, record groove (2) inspection record in the process, after qualified on inspection, carry out groove (2) removing surface;
(5): according to the requirement of weld seam preheat temperature table and weld seam interlayer temperature table, preheating is carried out to the heating tape (3) of preheat temperature to groove (2) place, adopt the method with preheating if desired, ensure preheat temperature and interlayer temperature;
(6): temperature measurer (4) is parallel on two straight lines at weld seam (5) center, thermometric is carried out to groove (2) edge point for measuring temperature, and record is carried out to surveyed temperature;
(7): after temperature confirmation is errorless, formally start the welding carrying out steel plate, the surface electrical heating of welding position is at the back side of welding portion, homogeneous heating, and heating region is more than or equal to 100mm;
(8): in above-mentioned welding process, temperature measurer (4) will carry out the measurement of temperature in the fore-and-aft direction of butt welding contact and side at any time, then surveyed preheat temperature and interlayer temperature is checked; When environment temperature is lower than 0 DEG C, do not need the welding point of preheating the mother metal in the region of joint should be preheated to and be greater than 21 DEG C;
(9): after steel plate has welded, within the scope of 2-3 times of weld seam (5) both sides thickness of slab, carry out post weld heat treatment immediately, to the steel plate of more than 36mm, heating-up temperature is at 250 ~ 350 DEG C, and keep 1 ~ 2 hour, simultaneously at 1 meter of at weld seam (5) two ends, be provided with sealing device (6);
(10): adopt heat insulating material formed (7) to carry out warming to it to the position completing post weld heat treatment, after weld seam (5) slowly cools, carry out the process of postwelding.
2. a kind of steel plate low temperature environment welding procedure according to claim 1, it is characterized in that: described welding material comprises carbon dioxide and ultrasonic inspection couplant, wherein, the gas cylinder of described carbon dioxide is opened valve the water in bottle is drained and can be used should be inverted 24 hours before work after; Meanwhile, in bottle, the high pressure of gas should be more than or equal to 1MPa, and checks the instruction on gas gauge, then check gas flowmeter and adjusting gas flow, and described ultrasonic inspection couplant adopts the ultrasonic inspection couplant of environmental protection anti-freeze type.
3. a kind of steel plate low temperature environment welding procedure according to claim 1, is characterized in that: the concrete numerical value of described weld seam preheat temperature table and weld seam interlayer temperature table following (t is the thickness of slab of the most thick parts of joint):
(1) weld seam preheat temperature table:
(2) weld seam interlayer temperature table:
4. a kind of steel plate low temperature environment welding procedure according to claim 1, is characterized in that: during described weld seam (3) heating, the width of every side should be greater than more than 1.5 times of weldment thickness, and is more than or equal to 100mm.
5. a kind of steel plate low temperature environment welding procedure according to claim 1, is characterized in that: described temperature measurer (5) adopts far infrared temperature measurement instrument and infrared ray point thermometer.
6. a kind of steel plate low temperature environment welding procedure according to claim 1, is characterized in that: described insulation material (7) is heat preservation rock.
7. a kind of steel plate low temperature environment welding procedure according to claim 1, is characterized in that: the concrete steps of described after welding treatment are as follows:
(1), after having welded, arrange and complete welding procedure record, and self-inspection is carried out to whole process;
(2) check that outward appearance and the UT of weld seam check, once pinpoint the problems in the process checked, alignment is timely reprocessed, and carries out inspection again;
(3) check no problem after, confirm that welding terminates, and welding place to be cleared up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393673.2A CN104999186A (en) | 2015-07-07 | 2015-07-07 | Thick steel plate low-temperature environment welding technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510393673.2A CN104999186A (en) | 2015-07-07 | 2015-07-07 | Thick steel plate low-temperature environment welding technology |
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| CN104999186A true CN104999186A (en) | 2015-10-28 |
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| CN201510393673.2A Pending CN104999186A (en) | 2015-07-07 | 2015-07-07 | Thick steel plate low-temperature environment welding technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270977A (en) * | 2016-09-20 | 2017-01-04 | 江苏京沪重工有限公司 | A kind of steel plate low temperature environment 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 |
| CN114147248A (en) * | 2021-11-16 | 2022-03-08 | 常熟市常盛重工钢结构有限公司 | Welding process of low-alloy high-strength structural steel |
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| JP2000225469A (en) * | 1999-02-03 | 2000-08-15 | Nippon Steel Corp | Method for welding flat plate made of ultra-heavy steel plate |
| CN101879645A (en) * | 2010-07-06 | 2010-11-10 | 蓬莱巨涛海洋工程重工有限公司 | Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment |
| CN102085602A (en) * | 2011-01-13 | 2011-06-08 | 安徽跨宇钢结构网架工程有限公司 | Steel-structure thick plate welding construction method under low-temperature environment |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000225469A (en) * | 1999-02-03 | 2000-08-15 | Nippon Steel Corp | Method for welding flat plate made of ultra-heavy steel plate |
| CN101879645A (en) * | 2010-07-06 | 2010-11-10 | 蓬莱巨涛海洋工程重工有限公司 | Marine engineering large thick steel plate submerged arc welding process method in low-temperature environment |
| CN102085602A (en) * | 2011-01-13 | 2011-06-08 | 安徽跨宇钢结构网架工程有限公司 | Steel-structure thick plate welding construction method under low-temperature environment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270977A (en) * | 2016-09-20 | 2017-01-04 | 江苏京沪重工有限公司 | A kind of steel plate low temperature environment 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 |
| CN114147248A (en) * | 2021-11-16 | 2022-03-08 | 常熟市常盛重工钢结构有限公司 | Welding process of low-alloy high-strength structural steel |
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Application publication date: 20151028 |