【摘要】 采用电阻铆焊的方法对A5052铝合金和Q235低碳钢进行焊接，分析了自冲铆铆钉的硬度和焊接参数对电阻铆焊接头的宏观形貌和力学性能以及铆钉腿端部与下板间的接合状态的影响。结果表明：采用高硬度铆钉(HRC为42±1)的电阻铆焊接头中形成的孔洞缺陷较少，其宏观形貌优于采用中等硬度(HRC为36±1)和较低硬度(HRC为33±1)铆钉的焊接接头。采用高硬度铆钉焊接时，随着焊接电流的增大，残留于铆钉腿端部与下板间的铝合金变薄。当焊接电流为10 kA,焊接时间为400 ms时，高硬度铆钉的焊接接头的最大抗剪力为7.67 kN。更多还原

【Abstract】 The A5052 aluminum alloy and Q235 low carbon steel were welded by resistance rivet-welding. Effect of hardness of self piercing rivets and welding parameters on macro morphology and mechanical properties of resistance riveted joints and the joint state between rivet leg end and lower plate were analyzed. The results show that the holes formed in the resistance riveted joints with high hardness rivets(HRC of 42±1) are less, and its macro morphology is better than that of the welded joints with medium hardness rivets(HRC of 36±1) and low hardness rivets(HRC of 33±1). When high hardness rivets are used for welding, with the increase of welding current, the aluminum alloy remaining between the end of rivet leg and the lower plate becomes thinner. When the welding current is 10 kA and the welding time is 400 ms, the maximum shear resistance of the high hardness rivet welded joint is 7.67 kN.更多还原