关键词: 301L不锈钢, 差厚, 电阻点焊, 密封胶, 可焊性, 力学性能

Abstract: The influences of adhesive sealant on weldability, nugget morphology, mechanical property and manufacturing process of resistance spot welding were systematically studied by 301L stainless steel with obvious different thickness (close to 7∶1) of sheets. The results show that the thermal decomposition processes of adhesive sealant may change current density distribution, which in turn affects the nugget diameter and penetration depth, and finally change the acceptable current range. In addition, the introduction of adhesive sealant has little effect on the weld spacing, and also shows a good tolerance to the initial gap.

Key words: 301L stainless steel, different thickness, resistance spot welding, adhesive sealant, weldability, mechanical property