Aluminum alloy 6061 and high-strength steel Q460 were joined by laser-arc-adhesive hybrid welding technology successfully. A Cu alloy interlayer was added between Al alloy and high-strength steel. The effect of the adhesive on laser-arc-adhesive hybrid welding of Al alloy to high-strength steel was discussed. The optical microscope, scanning electron microscope and electron probe micro-analysis were applied to observe the microstructural evolution and phase transition at Al–Fe interface of laser-arc-adhesive hybrid welded joints. The results showed the maximum tensile shear strength of the joint without adhesive was 256 MPa. After adding adhesive, the maximum tensile shear strength reached 282 MPa. The combination of the mechanical bonding and the metallurgical effect could improve the mechanical performances. The shape of the joint in Al alloy changed into a canine-like morphology. There was no porosity in welds because the molten pool of Al alloy and the special keyhole phenomenon of laser welding provided a channel for the decomposed gas to escape from fusion zone.

铝合金6061和高强度钢Q460通过激光电弧胶混合焊接技术成功结合。在铝合金和高强度钢之间添加了铜合金中间层。讨论了胶粘剂对铝合金与高强度钢激光-电弧-胶粘混合焊接的影响。应用光学显微镜，扫描电子显微镜和电子探针显微分析法观察了激光-电弧-粘接混合焊接接头在Al-Fe界面的显微组织演变和相变。结果表明，不使用粘合剂的接头的最大拉伸剪切强度为256 MPa。添加粘合剂后，最大拉伸剪切强度达到282 MPa。机械结合和冶金作用的结合可以改善机械性能。铝合金中的接头形状变成了犬似的形态。焊缝没有气孔，因为铝合金的熔池和特殊的激光焊接小孔现象为分解后的气体从熔化区逸出提供了通道。