Microstructure and property of SAC0307/Cu welded joint by via electromagnetic pulse welding

SAC0307/Cu电磁脉冲焊接接头的组织和性能研究 Microstructure and property of SAC0307/Cu welded joint by via electromagnetic pulse welding 苏子龙 SU Zilong 1 first-author 徐永庚 XU Yonggeng 1 高雷 GAO Lei 2 王刚 WANG Gang 1 冉洋 RAN Yang 2 尹立孟 YIN Limeng 1 重庆科技学院冶金与材料工程学院 重庆科技学院冶金与材料工程学院 School of Metallurgy and Materials Engineering,Chongqing University of Science & Technology School of Metallurgy and Materials Engineering,Chongqing University of Science & Technology 重庆市光学机械研究所 重庆市光学机械研究所 Chongqing Institute of Optics and Mechanics Chongqing Institute of Optics and Mechanics 在保证空气间隙1.5 mm不变的情况下,采用电磁脉冲焊接技术分别在13 kV、14 kV和15 kV的充电电压下完成了99.0Sn-0.3Ag-0.7Cu(SAC0307)和T2 Cu薄板的连接,并对其焊接接头的显微组织、拉伸强度和显微硬度进行了研究。结果表明:SAC0307/Cu电磁脉冲焊接的临界充电电压介于13～14 kV之间;当充电电压为15 kV时,获得的焊接接头性能最佳,其拉伸强度为22.23 MPa,界面平均显微硬度为41.04 HV;此外,扫描电镜观察和X射线能谱分析发现,接头中基本没有金属间化合物形成。 The electromagnetic pulse welding technology was ad opted to complete the connection of 99.0Sn-0.3Ag-0.7Cu（SAC0307） and T2 Cu thin plates with different charging voltage of 13 kV,14 kV,15 kV under the condition that the air gap was 1.5 mm. The microstructure,tensile strength and micro-hardness of the welded joints were then studied.The results show that the critical charging voltage of succe-ssful SAC0307/Cu electromagnetic pulse welding is between13 kV and14 kV;when the charging voltage is kept at 15 kV,the welded joint obtained has the best performance,its tensile strength is 22.23 MPa,and the average micro-hardness at the interface is 41.04 HV.In addition,scanning electron micros-copy and X-ray spectroscopy analysis reveal that no intermetallic compounds are found in the welded joints. 电磁脉冲焊接 异种金属连接 界面 显微组织 力学性能 electromagnetic pulse welding dissimilar metal connection interface microstructure mechanical property TG407 国家自然科学基金项目（51674056） 2022-03-08 5 50