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王旭友, 雷振, 张健, 王炎金. 高速列车6005A-T6铝合金型材激光-双丝MIG复合焊[J]. 焊接学报, 2012, (7): 9-12.
引用本文: 王旭友, 雷振, 张健, 王炎金. 高速列车6005A-T6铝合金型材激光-双丝MIG复合焊[J]. 焊接学报, 2012, (7): 9-12.
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WANG Xuyou, LEI Zhen, ZHANG Jian, WANG Yanjin. Laser-tandem MIG hybrid welding for 6005A-T6 aluminum alloy profile of high-speed train[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (7): 9-12.
Citation: WANG Xuyou, LEI Zhen, ZHANG Jian, WANG Yanjin. Laser-tandem MIG hybrid welding for 6005A-T6 aluminum alloy profile of high-speed train[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (7): 9-12.
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高速列车6005A-T6铝合金型材激光-双丝MIG复合焊

Laser-tandem MIG hybrid welding for 6005A-T6 aluminum alloy profile of high-speed train

    摘要
  • 摘要: 分别利用双丝MIG焊和激光-双丝MIG复合焊进行了高速列车6005A-T6铝合金型材的焊接试验研究,对比分析了两种焊接方法的焊缝成形、焊接变形、接头力学性能及其接头微观组织.结果表明,激光-双丝MIG复合焊接6005A-T6铝合金型材时的焊接速度可达4.5 m/min,焊接过程具有较好的搭桥能力,对接间隙达到1.4 mm时,仍可以获得良好的焊缝成形.当焊接速度大于或等于4 m/min时,复合焊接头的焊接变形量仅为常规双丝MIG焊的40%左右,其抗拉强度达到了母材强度的83%,比常规双丝MIG焊接头的抗拉强度提高了9%左右.

     

    Abstract: Welding research of 6005A-T6 aluminum alloy profile for high-speed train was done by using tandem MIG welding and laser-tandem MIG hybrid welding individually.The weld appearance, welding distortion, mechanical properties of the joints and microstructure were analyzed.The results demonstrated that high-efficient welding for the profile was achieved by using laser-tandem MIG hybrid welding, the speed of which was up to 4.5 m/min.The process had a good gap bridging ability that even if the gap of the butt joint was up to 1.4 mm, a good weld appearance could also be got.While the hybrid welding speed was greater than 4 m/min, the welding distortion of the laser-tandem MIG hybrid joints was just about 40% of that of the tandem MIG joints.And tensile strength of the hybrid joints was 83% of that of 6005A-T6 base metal, 9% higher than that of the tandem MIG joints.

     

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