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DONG Liming, YANG Li, DAI Jun, PAN Xin, ZHANG Yu. Development of submerged arc welding wire for fabrication of hot bend low-temperature pipeline steel K65 pipe[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 120-124.
Citation: DONG Liming, YANG Li, DAI Jun, PAN Xin, ZHANG Yu. Development of submerged arc welding wire for fabrication of hot bend low-temperature pipeline steel K65 pipe[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(12): 120-124.
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Development of submerged arc welding wire for fabrication of hot bend low-temperature pipeline steel K65 pipe

  • 1.

    College of Automotive Engineering, Changshu Institute of Technology, Changshu 215500, China;Iron & Steel Research Institute of Sha Steel of Jiangsu Province, Zhangjiagang 215625, China

  • 2.

    College of Automotive Engineering, Changshu Institute of Technology, Changshu 215500, China

  • 3.

    Iron & Steel Research Institute of Sha Steel of Jiangsu Province, Zhangjiagang 215625, China

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  • Received Date: November 06, 2014
    Graphical Abstract
    • Abstract
  • A NiMoTiB type solid wire was developed for submerged arc welding of hot bended K65 linepipe, and microstructure and mechanical property of the fabricated pipe with a wall thickness of 30.8 mm welded by two-sided four wire submerged arc welding were analyzed and tested. The results shows that the weld metal of as-welded pipe consists of acicular ferrite, a few bainite and M-A constituents, which has a tensile strength of 670 MPa and the impact absorbed energy is no less than 162 J at -40℃. Hot bending process changed the weld metal microstructure into a mix of blocky ferrite and pearlite, while possesses the tensile strength of 665 MPa and impact absorbed energy of no less than 84 J at -40℃.
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    • References (11)
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