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ZHANG Hongtao, SANG Jian, WANG Qichen, TENG Yao, ZHANG Wenjie. Research on plasma-MIG hybrid welding process of TATM700 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 25-30. DOI: 10.12073/j.hjxb.2019400307
Citation: ZHANG Hongtao, SANG Jian, WANG Qichen, TENG Yao, ZHANG Wenjie. Research on plasma-MIG hybrid welding process of TATM700 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 25-30. DOI: 10.12073/j.hjxb.2019400307
shu

Research on plasma-MIG hybrid welding process of TATM700 steel

  • 1.

    Harbin Institute of Technology at Weihai, Weihai 264209, China

  • 2.

    CIMC Marine Engineering Research Institute Co., Ltd.,Yantai 264000, China

  • 3.

    Weihai Donghai Shipyard Co., Ltd, Weihai 264209, China

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  • Received Date: March 09, 2019
    Graphical Abstract
    • Abstract
  • Process research on 12.5 mm thick low alloy high strength TATM700 girder steel for automobile structural parts was studied by plasma-MIG hybrid welding equipment. The weld formation, weld microstructure and mechanical properties under different groove forms were analyzed. Furthermore, it compared with the multi-layer manual TIG method of flux cored wire. The results showed that the groove form has less influence on the plasma-MIG composite welding seam. The sample welded by the composite welding method is well formed and the cross-sectional shape is reasonable. The weld structure consists of a small amount of side slab ferrite and a large number of acicular ferrite. The joint strength and bending performance are better than manual TIG welding, the tensile strength reaches 95% of the base metal, and the hardness is slightly lower than the multi-layer multi-channel hand-welded TIG welding sample.
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    • References (12)
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