In this paper, the magnetic pulse spot welding of aluminum and stainless steel sheets was successfully performed by placing a perforated insulator mask between the sheets. In order to improve the strength of spot welds, the parameters of voltage, thickness of mask, thickness of driver and diameter of mask hole were studied. It was observed that the increase in process parameters improved the tensile strength by 7.7 MPa and reduced the weld width by 62.5 µm. However, simultaneous enhancement of the tensile strength and weld width was achieved by setting the voltage at 11.86 kV, diameter of mask hole at 9 mm, thickness of mask at 1 mm and thickness of driver at 1 mm. The microstructure analysis indicated that the increase in process parameters resulted in the refinement of grain size up to 14 µm and formation of intermetallic layers Fe₄Al₁₃ and Al₁₃Cr₂. However, the interface of spot weld was found to be free of any intermetallic layers and defects at the optimal values of parameters.

在本文中，通过在铝板和不锈钢板之间放置穿孔绝缘体掩模，成功地进行了铝板和不锈钢板的磁脉冲点焊。为提高焊点强度，对电压、掩模厚度、驱动器厚度和掩模孔直径等参数进行了研究。据观察，工艺参数的增加使抗拉强度提高了 7.7 MPa，焊缝宽度减少了 62.5 µm。然而，通过将电压设置为 11.86 kV、掩模孔直径为 9 mm、掩模厚度为 1 mm 和驱动器厚度为 1 mm，同时提高了抗拉强度和焊缝宽度。微观结构分析表明，工艺参数的增加导致晶粒尺寸细化至 14 µm 并形成金属间层 Fe₄ Al ₁₃和Al ₁₃ Cr ₂。然而，发现在参数的最佳值下，点焊的界面没有任何金属间层和缺陷。