CN116673569A - Welding method for steel structural section bar - Google Patents
Welding method for steel structural section bar Download PDFInfo
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- CN116673569A CN116673569A CN202310903407.4A CN202310903407A CN116673569A CN 116673569 A CN116673569 A CN 116673569A CN 202310903407 A CN202310903407 A CN 202310903407A CN 116673569 A CN116673569 A CN 116673569A
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- 238000003466 welding Methods 0.000 title claims abstract description 270
- 238000000034 method Methods 0.000 title claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000012797 qualification Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 35
- 238000007689 inspection Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 13
- 238000003908 quality control method Methods 0.000 claims description 13
- 230000007547 defect Effects 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 238000012805 post-processing Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- 238000005238 degreasing Methods 0.000 claims description 6
- 238000005488 sandblasting Methods 0.000 claims description 6
- 239000006247 magnetic powder Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 238000007542 hardness measurement Methods 0.000 claims description 3
- 239000006249 magnetic particle Substances 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 238000009864 tensile test Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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
- B23K9/00—Arc welding or cutting
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The application relates to the technical field of welding methods, and provides a steel structure section welding method, which comprises the following steps: step one: preparation work, before welding, is first performed, which includes checking the quality and size of steel to ensure the qualification of welding materials, and checking the welding equipment to ensure its normal operation and the required welding capability. In the application, the welding deformation and the residual stress are controlled, the heat input and the heat affected zone in the welding process can be reduced by optimizing the welding process and parameters so as to reduce the occurrence of the deformation and the residual stress, the methods of preheating, post heat treatment and the like can be adopted to help control the welding deformation and release the residual stress, improve the toughness and the strength of a welding joint, select proper welding materials and filling materials, control the cooling speed in the welding process, improve the toughness and the strength of the welding joint and reduce the risk of brittle fracture.
Description
Technical Field
The application relates to the technical field of welding methods, in particular to a welding method for steel structural section bars.
Background
Welding of steel structural profiles is a common connection method, which is used for forming an integral structure by welding different steel components, welding deformation and residual stress, a high-temperature heat source in the welding process can cause deformation of the welded structure, especially for large and complex structures, and at the same time, heat generated in the welding process can also cause residual stress between a welded joint and a base material, the deformation and crack formation of the structure can be caused, brittle fracture tends to occur in part of steel materials in the welding process, and particularly in the case of too high cooling speed or a large amount of residual stress, the toughness and strength of the welded joint are reduced, the safety of the structure is reduced, the quality of a welding seam is difficult to detect, the quality of the welding seam in the welded joint is difficult to observe and detect directly, in some cases, welding defects (such as air holes, slag inclusions, cracks and the like) can be detected and repaired, the strength and the reliability of the structure can be potentially high, the welding cost is high, compared with other connection methods such as bolting or riveting, the welding process generally needs more welding equipment and high in the welding cost, the welding process and the welding equipment cost is high, and the welding process cost is required to be high, and the welding equipment cost is required to be filled with welding equipment and high in the welding process cost and the protection cost is required.
Disclosure of Invention
The application aims to solve the defects in the prior art, and provides a welding method for a steel structural section.
In order to achieve the above purpose, the present application adopts the following technical scheme: a welding method of steel structural section bars comprises the following steps:
step one: the preparation work is carried out, before welding, the preparation work is firstly required, and comprises the steps of checking the quality and the size of steel materials to ensure the qualification of welding materials, and checking welding equipment to ensure the normal operation and the required welding capability;
step two: cleaning the surface, namely cleaning the surface of the steel structure to be welded, removing greasy dirt, oxides and other impurities, wherein common cleaning methods comprise mechanical scraping, sand blasting, degreasing or chemical removal;
step three: designing and preparing a welding line, determining the shape and the size of the welding line according to specific welding requirements and structural design, marking the position of the welding line, and preparing two sides of the welding line;
step four: configuring welding equipment, configuring appropriate equipment and tools according to a selected welding method, including welders, electric welding guns, welding power sources, gas shielding equipment (e.g., shielding gas bottles, etc.), and corresponding welding materials (e.g., welding electrodes, welding wires, etc.);
step five: and welding, wherein the welding operation is performed according to the welding technological procedure. According to a specific welding method, adopting corresponding steps to weld, such as spot welding, segment-by-segment welding or continuous welding;
step six: quality control and detection are carried out in the welding process, so that the welding quality meets the requirements, and the quality control and detection comprises the steps of checking the appearance quality, the size and the geometric shape of a welding line, and carrying out nondestructive detection of the welding line, such as ultrasonic detection, ray detection or magnetic powder detection;
step seven: post-processing, performing necessary post-processing on the welded structure, which may include cleaning of welded joints, removing welding slag, removing surface defects possibly existing, performing necessary heat treatment or spraying protection, and the like;
step eight: and after the welding is finished, final inspection and acceptance are carried out, and welding quality is evaluated and verified according to corresponding standards and specifications, so that the structural strength, quality and safety of the welding are ensured to meet the design requirements.
As a further aspect of the present application, in the step one, the preparing step includes:
(1) Checking the quality and the size of the steel to ensure that the steel meets the requirements;
(2) Ensure the normal operation of welding equipment and tools, including welders, electric welding guns, welding power sources, gas protection equipment and the like.
As a further aspect of the application, in step two, the steel structure surface to be welded is cleaned using suitable methods and materials, such as mechanical doctoring, sandblasting, degreasing or chemical removal, to remove oil stains, oxides and other impurities.
As a further aspect of the present application, in step three, the step of designing and preparing the weld includes:
(1) Determining the shape, size and position of a welding line according to the structural design requirement;
(2) The position of the weld and the preparation surfaces on both sides of the weld are marked using a marking tool.
As a further aspect of the present application, in step four, the step of configuring the welding apparatus includes:
(1) Preparing required equipment and tools, such as a welder, an electric welding gun, a welding power source, etc., according to the selected welding method;
(2) Suitable welding materials, such as electrodes, welding wires, etc., are prepared.
As a further aspect of the present application, in the fifth step, the welding step includes:
(1) Performing welding operation according to a welding technological procedure;
(2) Properly adjusting welding parameters such as arc current, voltage, welding speed and the like according to the requirements of a welding method;
(3) The welding operation is performed using a suitable welding technique, such as manual arc welding, submerged arc welding, gas shielded welding, and the like.
As a further aspect of the present application, in step six, the quality control and detection step includes:
(1) In the welding process, quality control and detection are carried out;
(2) Checking the appearance quality of welding seams, including uniformity of the welding seams, welding height, welding width and the like;
(3) Nondestructive inspection of the weld, such as ultrasonic inspection, magnetic particle inspection, radiation inspection, etc., is performed to find potential weld defects.
As a further aspect of the present application, in step seven, the post-processing step includes:
(1) Carrying out necessary post-treatment on the welded structure according to the requirement;
(2) Cleaning welding slag, oxides and other impurities on the welding joint;
(3) Necessary heat treatments, such as post-weld heat treatment, tempering treatment, etc., may be performed to improve the performance and structural stability of the welded joint.
As a further aspect of the present application, in step eight, the checking and accepting step includes:
(1) Performing final inspection and acceptance to verify whether the welding quality meets design requirements and related standards;
(2) Methods such as tensile testing, hardness testing, and the like may be used to evaluate the strength and quality of the welded joint.
Compared with the prior art, the application has the advantages and positive effects that:
in the application, the welding deformation and residual stress are controlled, the heat input and heat affected area in the welding process can be reduced by optimizing the welding process and parameters, the occurrence of deformation and residual stress can be reduced, the preheating and post heat treatment and other methods can be adopted to help control the welding deformation and release residual stress, the toughness and strength of the welding joint are improved, proper welding materials and filling materials are selected, and the cooling speed in the welding process is controlled, the toughness and strength of the welding joint can be improved, the risk of brittle fracture is reduced, in addition, the proper pre-welding treatment such as rust removal, preheating, preparation of a welding surface and the like is carried out, the quality of a welding seam can be improved, the quality detection of the welding seam is enhanced, the comprehensive quality detection such as ultrasonic detection, magnetic powder detection, radiation detection and the like can be carried out on the welding joint, the problems such as welding defects and internal cracks can be found, repair measures can be timely adopted, the quality and reliability of the welding joint are improved, the welding cost benefit can be optimized, the welding process can be reduced on the premise of meeting the structural requirements by optimizing the structural connection form and the welding scheme, meanwhile, the reasonable selection and the quality management and the material waste are improved, and the welding process waste is reduced.
Drawings
Fig. 1 is a step diagram of a welding method for steel structural section bars.
Detailed Description
In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments of the disclosure that follow.
Example 1
Referring to fig. 1, the present application provides a technical solution: a welding method of steel structural section bars comprises the following steps:
step one: the preparation work is carried out, before welding, the preparation work is firstly required, and comprises the steps of checking the quality and the size of steel materials to ensure the qualification of welding materials, and checking welding equipment to ensure the normal operation and the required welding capability;
step two: cleaning the surface, namely cleaning the surface of the steel structure to be welded, removing greasy dirt, oxides and other impurities, wherein common cleaning methods comprise mechanical scraping, sand blasting, degreasing or chemical removal;
step three: designing and preparing a welding line, determining the shape and the size of the welding line according to specific welding requirements and structural design, marking the position of the welding line, and preparing two sides of the welding line;
step four: configuring welding equipment, configuring appropriate equipment and tools according to a selected welding method, including welders, electric welding guns, welding power sources, gas shielding equipment (e.g., shielding gas bottles, etc.), and corresponding welding materials (e.g., welding electrodes, welding wires, etc.);
step five: and welding, wherein the welding operation is performed according to the welding technological procedure. According to a specific welding method, adopting corresponding steps to weld, such as spot welding, segment-by-segment welding or continuous welding;
step six: quality control and detection are carried out in the welding process, so that the welding quality meets the requirements, and the quality control and detection comprises the steps of checking the appearance quality, the size and the geometric shape of a welding line, and carrying out nondestructive detection of the welding line, such as ultrasonic detection, ray detection or magnetic powder detection;
step seven: post-processing, performing necessary post-processing on the welded structure, which may include cleaning of welded joints, removing welding slag, removing surface defects possibly existing, performing necessary heat treatment or spraying protection, and the like;
step eight: and after the welding is finished, final inspection and acceptance are carried out, and welding quality is evaluated and verified according to corresponding standards and specifications, so that the structural strength, quality and safety of the welding are ensured to meet the design requirements.
As a further aspect of the present application, in the step one, the preparing step includes:
(1) Checking the quality and the size of the steel to ensure that the steel meets the requirements;
(2) Ensure the normal operation of welding equipment and tools, including welders, electric welding guns, welding power sources, gas protection equipment and the like.
As a further aspect of the application, in step two, the steel structure surface to be welded is cleaned using suitable methods and materials, such as mechanical doctoring, sandblasting, degreasing or chemical removal, to remove oil stains, oxides and other impurities.
As a further aspect of the present application, in step three, the step of designing and preparing the weld includes:
(1) Determining the shape, size and position of a welding line according to the structural design requirement;
(2) The position of the weld and the preparation surfaces on both sides of the weld are marked using a marking tool.
As a further aspect of the present application, in step four, the step of configuring the welding apparatus includes:
(1) Preparing required equipment and tools, such as a welder, an electric welding gun, a welding power source, etc., according to the selected welding method;
(2) Suitable welding materials, such as electrodes, welding wires, etc., are prepared.
As a further aspect of the present application, in the fifth step, the welding step includes:
(1) Performing welding operation according to a welding technological procedure;
(2) Properly adjusting welding parameters such as arc current, voltage, welding speed and the like according to the requirements of a welding method;
(3) The welding operation is performed using a suitable welding technique, such as manual arc welding, submerged arc welding, gas shielded welding, and the like.
As a further aspect of the present application, in step six, the quality control and detection step includes:
(1) In the welding process, quality control and detection are carried out;
(2) Checking the appearance quality of welding seams, including uniformity of the welding seams, welding height, welding width and the like;
(3) Nondestructive inspection of the weld, such as ultrasonic inspection, magnetic particle inspection, radiation inspection, etc., is performed to find potential weld defects.
As a further aspect of the present application, in step seven, the post-processing step includes:
(1) Carrying out necessary post-treatment on the welded structure according to the requirement;
(2) Cleaning welding slag, oxides and other impurities on the welding joint;
(3) Necessary heat treatments, such as post-weld heat treatment, tempering treatment, etc., may be performed to improve the performance and structural stability of the welded joint.
As a further aspect of the present application, in step eight, the checking and accepting step includes:
(1) Performing final inspection and acceptance to verify whether the welding quality meets design requirements and related standards;
(2) Methods such as tensile testing, hardness testing, and the like may be used to evaluate the strength and quality of the welded joint.
In the application, the welding deformation and the residual stress are controlled, the heat input and the heat affected zone in the welding process can be reduced by optimizing the welding process and parameters so as to reduce the occurrence of the deformation and the residual stress, the methods of preheating, post heat treatment and the like can be adopted to help control the welding deformation and release the residual stress, improve the toughness and the strength of a welding joint, select proper welding materials and filling materials, control the cooling speed in the welding process, improve the toughness and the strength of the welding joint and reduce the risk of brittle fracture. In addition, the quality of the welding seam can be improved by carrying out proper welding pretreatment such as rust removal, preheating, preparation of a welding surface and the like, the quality detection of the welding seam can be enhanced, the comprehensive quality detection of the welding joint can be carried out by adopting nondestructive detection methods such as ultrasonic detection, magnetic powder detection, ray detection and the like, the problems of welding defects, internal cracks and the like can be found by adopting the methods, repairing measures can be timely adopted, the quality and the reliability of the welding joint are improved, the welding cost efficiency is optimized, and in the welding design stage, the welding cost can be reduced on the premise of meeting the structural requirements by optimizing the structural connection form and the welding scheme, and meanwhile, the welding equipment and materials are reasonably selected, so that the process management and the quality control are enhanced, and the welding efficiency and the resource waste are improved.
The present application is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present application without departing from the technical content of the present application still belong to the protection scope of the technical solution of the present application.
Claims (9)
1. The welding method for the steel structural section bar is characterized by comprising the following steps of:
step one: the preparation work is carried out, before welding, the preparation work is firstly required, and comprises the steps of checking the quality and the size of steel materials to ensure the qualification of welding materials, and checking welding equipment to ensure the normal operation and the required welding capability;
step two: cleaning the surface, namely cleaning the surface of the steel structure to be welded, removing greasy dirt, oxides and other impurities, wherein common cleaning methods comprise mechanical scraping, sand blasting, degreasing or chemical removal;
step three: designing and preparing a welding line, determining the shape and the size of the welding line according to specific welding requirements and structural design, marking the position of the welding line, and preparing two sides of the welding line;
step four: configuring welding equipment, configuring appropriate equipment and tools according to a selected welding method, including welders, electric welding guns, welding power sources, gas shielding equipment (e.g., shielding gas bottles, etc.), and corresponding welding materials (e.g., welding electrodes, welding wires, etc.);
step five: and welding, wherein the welding operation is performed according to the welding technological procedure. According to a specific welding method, adopting corresponding steps to weld, such as spot welding, segment-by-segment welding or continuous welding;
step six: quality control and detection are carried out in the welding process, so that the welding quality meets the requirements, and the quality control and detection comprises the steps of checking the appearance quality, the size and the geometric shape of a welding line, and carrying out nondestructive detection of the welding line, such as ultrasonic detection, ray detection or magnetic powder detection;
step seven: post-processing, performing necessary post-processing on the welded structure, which may include cleaning of welded joints, removing welding slag, removing surface defects possibly existing, performing necessary heat treatment or spraying protection, and the like;
step eight: and after the welding is finished, final inspection and acceptance are carried out, and welding quality is evaluated and verified according to corresponding standards and specifications, so that the structural strength, quality and safety of the welding are ensured to meet the design requirements.
2. The steel structural section welding method according to claim 1, wherein: in step one, the preparation step comprises:
(1) Checking the quality and the size of the steel to ensure that the steel meets the requirements;
(2) Ensure the normal operation of welding equipment and tools, including welders, electric welding guns, welding power sources, gas protection equipment and the like.
3. The steel structural section welding method according to claim 1, wherein: in step two, the steel structure surface to be welded is cleaned using suitable methods and materials, such as mechanical doctoring, sand blasting, degreasing or chemical removal, to remove oil stains, oxides and other impurities.
4. The steel structural section welding method according to claim 1, wherein: in step three, the step of designing and preparing the weld includes:
(1) Determining the shape, size and position of a welding line according to the structural design requirement;
(2) The position of the weld and the preparation surfaces on both sides of the weld are marked using a marking tool.
5. The steel structural section welding method according to claim 1, wherein: in step four, the step of configuring the welding equipment includes:
(1) Preparing required equipment and tools, such as a welder, an electric welding gun, a welding power source, etc., according to the selected welding method;
(2) Suitable welding materials, such as electrodes, welding wires, etc., are prepared.
6. The steel structural section welding method according to claim 1, wherein: in step five, the welding step includes:
(1) Performing welding operation according to a welding technological procedure;
(2) Properly adjusting welding parameters such as arc current, voltage, welding speed and the like according to the requirements of a welding method;
(3) The welding operation is performed using a suitable welding technique, such as manual arc welding, submerged arc welding, gas shielded welding, and the like.
7. The steel structural section welding method according to claim 1, wherein: in step six, the quality control and detection steps include:
(1) In the welding process, quality control and detection are carried out;
(2) Checking the appearance quality of welding seams, including uniformity of the welding seams, welding height, welding width and the like;
(3) Nondestructive inspection of the weld, such as ultrasonic inspection, magnetic particle inspection, radiation inspection, etc., is performed to find potential weld defects.
8. The steel structural section welding method according to claim 1, wherein: in step seven, the post-processing step includes:
(1) Carrying out necessary post-treatment on the welded structure according to the requirement;
(2) Cleaning welding slag, oxides and other impurities on the welding joint;
(3) Necessary heat treatments, such as post-weld heat treatment, tempering treatment, etc., may be performed to improve the performance and structural stability of the welded joint.
9. The steel structural section welding method according to claim 1, wherein: in step eight, the checking and accepting step includes:
(1) Performing final inspection and acceptance to verify whether the welding quality meets design requirements and related standards;
(2) Methods such as tensile testing, hardness testing, and the like may be used to evaluate the strength and quality of the welded joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903407.4A CN116673569A (en) | 2023-07-22 | 2023-07-22 | Welding method for steel structural section bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903407.4A CN116673569A (en) | 2023-07-22 | 2023-07-22 | Welding method for steel structural section bar |
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| CN116673569A true CN116673569A (en) | 2023-09-01 |
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| CN202310903407.4A Pending CN116673569A (en) | 2023-07-22 | 2023-07-22 | Welding method for steel structural section bar |
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