基于组合热源模型焊剂片约束电弧焊T形接头温度场及应力场计算与试验研究

doi:10.11896/cldb.19100032

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Abstract Acombined welding heat source model coupled by a flat gaussian and a cylindrical volume heat source was developed to analysis the evolution of welding-induced temperature, residual stress and distortion distribution during the processing of the flux band constraining arc (FBCA) welded T-joint of the Ⅰ-core sandwich. The experiment statistics were obtained by the infrared thermal imager and the three-coordinate instrument. By comparing the results between the experiment and simulation, it is found that the weld cross section, thermal cycle curves, welding isothermal curves and welding distortion are basically consistence between experiment and simulation, which proves the validity and feasibility of the combined welding heat source model on the analysis of this method. At the same time, it is found that the residual stress generated during the welding process is concentrated on the weld and its vicinity, which is much lower than the yield stress of the material. And the residual deformation is acceptable, that the maximum distortion happened on the edge of the panels, according to the experimental measurements. This indicates that the FBCA can effectively control the residual deformation of high-strength steel T-joints, which improves the welding technology for the sandwich panels.

Key words： flux band constraining arc welding T-joint welding temperature field welding residual stress welding distortion

Published: 02 December 2020

CLC number:

TG404

Fund:This work was financially supported by the National Natural Science Foundation of China (51665033), Innovation and Enterprise Foundation of Gansu Provincial Science & Technology Department (18CX6JA025).

About author:: Jisen Qiaois a professor and Ph.D. supervisor at College of Material Science and Engineering, Lanzhou University of Technology. He received his Ph.D. degree in materials processing engineering from department of welding engineering, Lanzhou University of Technology. His group research topics are mainly focused on the design of welded joints and components of light alloys in automobile industry, damage and failure of the mate-rials during large plastic deformation. He published more than 60 journal papers and applied 7 national invention patents. He once awarded the first prize of Technology Progress of Gansu Provence, and second prize of Ministry of metallurgical nonferrous industry.Zhenglei Rui, has been a master degree candidate in the College of Materials Science and Engineering, Lanzhou University of Technology since September 2017. Mainly engaged in the research of welding manufacturing technology and structural mechanical properties of high-strength steel sandwich panels.

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Cite this article:

QIAO Jisen,RUI Zhenglei,WANG Lei, et al. Temperature and Residual Stress Field of Flux Bands Constraining Arc Welding T-joint by FEA Based on Hybrid Welding Heat Source Model and Experimental Investigation[J]. Materials Reports, 2020, 34(22): 22142-22147.

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http://www.mater-rep.com/EN/10.11896/cldb.19100032 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22142

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