Volume 42 Issue 5
Oct.  2021
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Zheng Bangzhi, Tian Xiaolin, Wang Zelong, Tang Xinxin. Research on numerical simulation method for dynamic tensile performance of laser tailor-welded joints of different thickness[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 62-68. doi: 10.7513/j.issn.1004-7638.2021.05.010
Citation: Zheng Bangzhi, Tian Xiaolin, Wang Zelong, Tang Xinxin. Research on numerical simulation method for dynamic tensile performance of laser tailor-welded joints of different thickness[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 62-68. doi: 10.7513/j.issn.1004-7638.2021.05.010

Research on numerical simulation method for dynamic tensile performance of laser tailor-welded joints of different thickness

doi: 10.7513/j.issn.1004-7638.2021.05.010
  • Received Date: 2021-01-06
  • Publish Date: 2021-10-30
  • The laser tailored welding process of HC340LA and HC260LA low-alloy high-strength steels with different thicknesses was studied, and the welded joints were tested and analyzed by X-ray flaw detection, static tensile, metallographic structure and microhardness. The results show that the low-alloy high-strength steel with different thickness can get well-formed welds through the laser tailor welding process, and the weld structure is mainly columnar martensite. After flaw detection, the welds showed no obvious defects such as pores and slag inclusions. The fracture position of the tensile specimen was on the side of the base material of the thin blank, and the hardness of the weld fusion zone was significantly higher than that of the base material. For laser tailor-welded joints, dynamic tensile test and numerical simulation analysis are carried out, and the difference between common node model and test, regional effect and thickness effect on stress and strain are studied. The research shows that the strain values of the dynamic tensile simulation using the common node numerical model are much higher than those measured in the experiment. The area of the base metal associated with the weld can directly affect the distribution of stress and strain, the strain can be regulated by the regional effect, and the stress can be regulated by the thickness effect.
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