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对高速列车用６０６３、６０６１、９１９（相当于７００５）铝合金母材及与之相匹配的焊丝（４０４３、５１８３、５３５６铝合金丝）施以ＭＩＧ焊接之后的焊区强度、硬度以及焊接接头的腐蚀倾向、残余应力水平和常见的焊接裂纹与气孔等缺陷进行了分析和研究。结果表明，由于产生了软化，焊缝及热影响区的强度和硬度均低于母材；从综合效果来看，以母材６０６１合金匹配４０４３焊丝为佳；从焊后强度和刚度看，中空型材的截面以斜筋截面为优；从焊接接头的可靠性看，以纵向ＭＩＧ自动焊接对接为最好
For high-speed train with 6063,6061,919 (equivalent to 7005) aluminum alloy base metal and its matching wire (4043,5183,5356 aluminum wire) after MIG welding zone strength, hardness and welded joints Corrosion tendency, residual stress level and common defects such as weld cracks and pores were analyzed and studied. The results show that the strength and hardness of weld and heat affected zone are lower than the base metal due to the softening. From the overall effect, it is better to use the base metal 6061 alloy to match the 4043 wire. From the point of post-weld strength and stiffness, Profile of the section to the slant section as a priority; from the reliability of the welded joints, the longitudinal MIG docking is the best automatic welding