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低温管线K65热煨弯管用埋弧焊丝研制

董利明, 杨莉, 戴军, 潘鑫, 张宇

董利明, 杨莉, 戴军, 潘鑫, 张宇. 低温管线K65热煨弯管用埋弧焊丝研制[J]. 焊接学报, 2016, 37(12): 120-124.
引用本文: 董利明, 杨莉, 戴军, 潘鑫, 张宇. 低温管线K65热煨弯管用埋弧焊丝研制[J]. 焊接学报, 2016, 37(12): 120-124.
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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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低温管线K65热煨弯管用埋弧焊丝研制

  • 1.

    汽车工程学院, 常熟理工学院, 常熟 215500;江苏省(沙钢)钢铁研究院, 张家港 215625

  • 2.

    汽车工程学院, 常熟理工学院, 常熟 215500

  • 3.

    江苏省(沙钢)钢铁研究院, 张家港 215625

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

摘要

    摘要
  • 摘要: 设计了NiMoTiB体系实芯焊丝用于低温管线K65热煨弯管的埋弧焊接，并采用φ4.0 mm焊丝、双面四丝埋弧焊开展了壁厚30.8 mm直缝管试制，然后利用热煨弯制工艺制成弯管，并分别测试了直缝管和弯管的焊缝金属微观组织及力学性能.结果表明，焊态直缝管焊缝组织以针状铁素体为主，以及少量贝氏体及马氏体-奥氏体岛（M-A）；焊缝金属抗拉强度670 MPa，-40℃冲击吸收功为162 J.经过淬火+回火处理的热煨弯管焊缝主要由块状铁素体和尺寸1~5 μm的退化珠光体组成；焊缝金属抗拉强度665 MPa，-40℃冲击吸收功84 J，能够满足低温管线钢K65的标准要求.
    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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    • 参考文献(11)
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  • 收稿日期:  2014-11-06

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