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不锈钢薄板大间隙接头激光-MIG电弧复合高速焊接工艺

张洲, 单际国, 吴爱萍, 任家烈

张洲, 单际国, 吴爱萍, 任家烈. 不锈钢薄板大间隙接头激光-MIG电弧复合高速焊接工艺[J]. 焊接学报, 2015, 36(10): 109-112.
引用本文: 张洲, 单际国, 吴爱萍, 任家烈. 不锈钢薄板大间隙接头激光-MIG电弧复合高速焊接工艺[J]. 焊接学报, 2015, 36(10): 109-112.
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ZHANG Zhou, SHAN Jiguo, WU Aiping, REN Jialie. Study on high speed laser-MIG hybrid welding for large gap joint of stainless steel sheet[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(10): 109-112.
Citation: ZHANG Zhou, SHAN Jiguo, WU Aiping, REN Jialie. Study on high speed laser-MIG hybrid welding for large gap joint of stainless steel sheet[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(10): 109-112.
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不锈钢薄板大间隙接头激光-MIG电弧复合高速焊接工艺

  • 1.

    清华大学 机械工程系, 北京 100084

  • 2.

    清华大学 机械工程系, 北京 100084;清华大学 先进成形制造教育部重点实验室, 北京 100084

Study on high speed laser-MIG hybrid welding for large gap joint of stainless steel sheet

  • 1.

    Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

  • 2.

    Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Tsinghua University, Beijing 100084, China

摘要

    摘要
  • 摘要: 采用填充ER316焊丝的光纤激光-MIG电弧复合焊方法,焊接间隙为0.5 mm、厚度为1 mm的SUS444铁素体不锈钢薄板对接接头和搭接接头,研究了获得成形良好的对接接头和搭接接头的工艺参数窗口和极限焊接速度,并对焊缝进行了着色渗透检验和拉伸试验. 结果表明,合理匹配焊接速度和焊接电流,是获得成形良好的大间隙接头的关键;当焊接速度过小或焊接电流过大时,较大的热输入导致焊缝过度熔透,焊缝成形不良;当焊接速度过大或焊接电流过小时,较小的热输入导致焊缝未熔透. 对接接头焊缝成形质量良好且熔透的极限焊接速度可达12 m/min,而搭接接头的极限焊接速度为5 m/min. 成形良好的焊缝均未发现表面裂纹. 拉伸试验表明,对接接头断裂在母材上;搭接接头绝大部分断裂在熔合线附近,极限焊接速度下获得的搭接接头的抗拉强度是母材的84.2%.
    Abstract: Fiber laser-MIG hybrid welding using ER316 filler metal was applied to join the 1mm thickness SUS444 ferrite stainless steel sheet by butt joint and lap joint with a gap of 0.5 mm. In this study, the process window has been successfully obtained for acquiring butt joint and lap joint with good formation. Both dye-penetrant inspection and tensile experiment have been conducted on those joints. The results show that the proper match of welding speed and welding current is a key factor for acquiring large gap joint with good appearance. When welding speed is too low or welding current is too high, the excessive heat input leads to excessive penetration of the weld resulting in bad weld formation. When welding speed is too high or welding current is too low, the heat input is not capable to penetrate the joint. In addition, the highest welding speed can reach 12 m/min and 5 m/min for butt joint and lap joint with good formation with full penetration. In dye-penetrant inspections, no surface crack was found for all the joint with good formation. Meanwhile, in tensile experiments, all the butt joint fractured at the base metal, and most of the lap joint fractured near the fusion line. The tensile strength of the lap joint reached 84.2 % of the strength of base metalunder the highest welding speed (5m/min).
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    • 参考文献(11)
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  • 收稿日期:  2014-01-19

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