In order to improve the joining performance between aluminum alloy and steel, a method termed resistance projection-plug welding was tried to weld steel to aluminum alloy. The microstructure and properties of the joint obtained by this method under various welding parameters were analyzed. Scanning electron microscopy studies of the interfacial microstructures revealed that a reaction layer, consisting of Fe₂Al₅ adjacent to steel and FeAl₃ adjacent to aluminum alloy, is formed in the interface outside the nugget. The maximum tensile shear and cross-tension loads of the joint reached 6.92 and 4.13 kN, respectively, in comparison with 5.0 and 1.4 kN, respectively, for resistance spot welding with a cover plate. The results revealed that the resistance projection-plug welding is an effective method for welding steel and aluminum alloys.

为了改善铝合金与钢之间的连接性能，尝试了一种称为电阻凸塞焊接的方法将钢焊接至铝合金。分析了该方法在各种焊接参数下获得的接头的组织和性能。扫描电子显微镜对界面微观结构的研究表明，反应层由与钢相邻的Fe ₂ Al ₅和FeAl _3组成在熔核外部的界面中形成与铝合金相邻的区域。接头的最大拉伸剪切载荷和横向拉伸载荷分别达到6.92 kN和4.13 kN，而用盖板电阻点焊分别达到5.0 kN和1.4 kN。结果表明，电阻凸塞焊是钢和铝合金焊接的有效方法。