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Dual-phase high-strength steel welding parameter optimization method

A technology of welding parameters and optimization methods, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc., can solve the problems of manpower, financial resources and time waste, high operator requirements, low production efficiency, etc., to achieve The effect of improving quality, reducing the number of tests, and improving production efficiency

Active Publication Date: 2019-12-27
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0004] At present, the improvement of welding deformation is mainly through the improvement of welding process parameters. However, the optimization of welding process parameters mainly relies on a large number of experiments to obtain data, and has high requirements for operators, which causes waste of manpower, financial resources and time. Low production efficiency

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Embodiment Construction

[0024] With the development of mathematical science, more and more studies on combining mathematical agent models with production to optimize product quality have been reported. However, in the field of welding, these methods have not been widely used. The quality of welded joints is directly related to the control of parameters by craftsmen. It is precisely because of the subjectivity of the control of process parameters in welding production that the quality of welded joints is often not optimal, resulting in short product service cycles and potential safety hazards. When using mathematical methods to optimize welding parameters, since the entire optimization process is only realized through a series of algorithms and models, the use of mathematical methods to optimize welding parameters can effectively avoid the influence of human subjectivity in the design process stage , so that the performance of the welded joint is further improved. At the same time, since the establi...

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Abstract

The invention discloses a dual-phase high-strength steel welding parameter optimization method. A method of combining a response surface method (RSM) with a quantum genetic algorithm (QGA) is utilizedfor optimizing TIG double-sided welding process parameters of double-phase high-strength steel with an I-shaped groove, and the method particularly comprises the steps of determining a welding material and initial process parameters, performing welding and measuring the deformation amount after welding, establishing a response surface model, obtaining optimal parameters by using the QGA to solvea response surface model, verifying the optimal process parameters and the like. A reliable response surface model can be established by using a limited number of tests to replace a large number of tests, so that the purpose of predicting the welding quality through welding parameters is achieved; double-sided TIG welding of dual-phase high-strength steel such as DP590 and DP780 with the I-shapedgrooves is conducted, the design cycle can be greatly shortened, the welding deformation amount can be reduced, and not only can the production efficiency be improved, but also the quality of weldingproducts can be improved.

Description

technical field [0001] The invention relates to a method for optimizing welding parameters of steel, in particular to a method for optimizing double-sided TIG welding parameters for dual-phase high-strength steels such as DP590 and DP780 for I-shaped grooves, and belongs to the field of welding technology. Background technique [0002] Dual-phase high-strength steel (dual-phase, referred to as DP steel), also known as multi-phase steel, is a steel composed of two phases of martensite, austenite or bainite and a ferrite matrix. It is a low-carbon steel or Low-alloy high-strength steel is obtained by critical zone heat treatment or controlled rolling. Duplex high-strength steel has the characteristics of light weight, high strength and good formability. Statistics show that every 10% reduction in the weight of the car body will reduce the fuel consumption per 100 kilometers by 5%. Therefore, dual-phase steel has been successfully used in the automotive industry as the preferr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K103/04
CPCB23K9/167B23K2103/04
Inventor 颜天郭永环范希营黄传奇
Owner XUZHOU NORMAL UNIVERSITY
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