High-strength steel welding method with accurate quality control
A welding method and high-strength steel technology, applied in welding equipment, welding accessories, manufacturing tools, etc., can solve problems such as the decline in mechanical properties of joints, and achieve the effects of improving reliability and safety, reliable mechanical properties, and possessing mechanical properties
Inactive Publication Date: 2019-11-12
GUANGZHOU UNIVERSITY
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Problems solved by technology
[0003] Aiming at the technical problems existing in the prior art, the purpose of the present invention is to provide a high-strength steel welding method with precise quality control, which ensures the welding quality of high-strength steel and solves the problem of significant decline in mechanical properties, softening, and brittleness of joints after high-strength steel welding. Improve the reliability and safety of steel structures
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[0025] The present invention will be further described in detail in conjunction with the accompanying drawings and specific embodiments.
[0026] In order to facilitate a unified review of the various reference signs in the drawings of the specification, the unified description of the reference signs appearing in the drawings of the specification is as follows:
[0027] 1 is the test piece and 2 is the weldment.
[0028] A high-strength steel welding method with precise quality control, comprising the following steps:
[0029] Steps to determine welding parameters: the first step is to use a thermal simulation testing machine to test the specimen, and heat the specimen to the proposed preheating temperature at a heating rate of 10°C / s (the proposed preheating temperature is preliminarily determined based on experience and reasonableness) , and then maintain the preheating temperature for 5s, here is used to determine the preheating temperature. In the second step, continue t...
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Abstract
The invention relates to a high-strength steel welding method with accurate quality control. The high-strength steel welding method comprises the following steps that welding parameters are determined, and specifically, a test part is tested by using a thermal simulation test machine, and then the test part is heated to a preset preheating temperature with a temperature rate at 10 DEG C / s; the test part is continuously heated with the preset weld heat input to the peak temperature, the test part is cooled to the normal temperature after the peak temperature is kept for 1 second; and then the test part is heated with the temperature rate of 200 DEG C / h to a preset postweld heat treatment temperature, heat preservation is conducted for 2 hours, and then the test part is cooled to the normaltemperature with the cooling rate of 100 DEG C / h; preheating is conducted on a V-shaped groove of a welding part, and specifically, the preheating temperature is the preheating temperature determinedin the step of determining the welding parameters; postweld heat treatment is conducted, and specifically, heat treatment is conducted on the welding part, the temperature rate during the heat treatment is 200 DEG C / h, the heat preservation is conducted for 2 hours after the heating is conducted to the postweld heat treatment temperature, and then the welding part is cooled to the normal temperature with the temperature rate of 100 DEG C / h. According to the welding method, the welding quality of the high-strength steel is improved, and the welding method belongs to the technical field of high-strength steel welding.
Description
technical field [0001] The invention relates to the technical field of high-strength steel welding, in particular to a high-strength steel welding method with precise quality control. Background technique [0002] Welding is the main connection method of building steel structures, and plays an important role in building steel structure engineering, while building steel structures will gradually adopt high-strength steel, which puts forward higher requirements for welding in the determination of welding parameters and welding process control. At present, the main problems in high-strength steel welding are that the strength loss of welded joints caused by welding heat input and the cold cracks caused by welding cause the attenuation of the mechanical properties of the joints. At the same time, due to the inability to monitor the welding parameters in real time, the welding quality is difficult to guarantee. Contents of the invention [0003] Aiming at the technical problems...
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IPC IPC(8): B23K9/16B23K9/235B23K9/32B23K9/095
CPCB23K9/095B23K9/16B23K9/235B23K9/32
Inventor 江进彭展翼
Owner GUANGZHOU UNIVERSITY