A welding method for forged steel parts
A welding method and forged steel technology, which is applied in the field of forged steel welding, can solve problems such as cold cracks and hot cracks, achieve the effects of reducing cold cracks and hot cracks, ensuring welding quality, and preventing welding deformation
Active Publication Date: 2020-01-31
CHINA CONSTR STEEL STRUCTURE WUHAN
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of existing forged steel welding methods that are prone to hot cracks and cold cracks, and to provide a forged steel welding method that improves welding quality and efficiency
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0027] A welding method for forged steel parts, comprising the following steps,
[0028] Assembly and cleaning before welding: Assemble the forgings and clean the welds to be welded;
[0029] Preheating before welding: preheating the weld;
[0030] Welding: The welding seam is welded by layering and back welding in separate lanes, and the temperature at the weld seam is controlled during the welding process;
[0031] Post-weld heat: heat the weld and then heat preservation.
[0032] This welding method guarantees the welding quality through rigorous pre-welding preparations, reasonable welding process sequence, and standardized temperature control measures, effectively reduces the generation of cold cracks and hot cracks, and prevents welding def...
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The invention belongs to the technical field of welding, and specifically relates to a forged steel piece welding method. The forged steel piece welding method comprises the following steps of: (A) assembly and cleaning before welding: a forged steel piece is assembled; and a welding line needing to be welded is cleaned; (B) preheating before welding: the welding line is preheated; (C) welding: the welding line is welded by adoption of a layering and a laning backward welding mode, and the temperature of the welding line is controlled in the welding process; and (D) post-heating of the welding line: the welding line is heated and is then subjected to insulation treatment. The welding method guarantees the welding quality through rigorous preparation before welding, reasonable welding process sequence and standard temperature control measures, effectively reduces generation of cold cracks and hot cracks, and prevents welding deformation.
Description
technical field [0001] The invention belongs to the technical field of welding, and more specifically relates to a welding method for forged steel parts. Background technique [0002] Forged steel parts are processed by cold forging, cold heading, forging, forging and other cold working methods to make the internal structure of the material denser, improve the crystal structure of the material, and eliminate gaps, thereby greatly improving the strength and toughness of the material. Due to the high strength and good toughness of forged steel parts, they are more and more widely used in steel structure buildings. [0003] The main material of the forged steel joints of the outrigger truss is Q390GJC, the maximum plate thickness is 100mm, and the heaviest forged steel joint is about 52 tons. The forged steel joint is a special-shaped joint with multiple legs, and the main welded joints are concentrated on the main rod (forged steel). Due to the large degree of restraint in th...
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IPC IPC(8): B23K7/00
CPCB23K7/00B23K7/008
Inventor 陈苍李建宏李定山李威康宁邓凌云刘亚东朱强
Owner CHINA CONSTR STEEL STRUCTURE WUHAN