超声波辅助泡沫Ni/Sn-9Zn复合钎料低温钎焊7075-Al接头组织及性能研究  

Study on microstructure and properties of 7075-Al joint soldered by ultrasonic assisted with foam Ni/Sn-9Zn composite solder

作　　者：王文涛[1] 王玲 肖勇[1] 杜学铭[1] 

机构地区：[1]武汉理工大学,湖北武汉430070 [2]中国电器科学研究院有限公司,广东广州510300

出　　处：《焊接技术》2017年第5期17-21,共5页Welding Technology

基　　金：基金项目:电器电子产品绿色制造共性技术创新平台(2013B090700006)

摘　　要：利用泡沫Ni增强Sn-9Zn复合钎料并结合超声波辅助无钎剂钎焊方法制备了Al/Sn-9Zn/Al钎焊接头,研究了超声波振动时间和钎焊温度对接头显微组织和抗剪强度的影响:研究结果表明:钎焊时间较短时,接头界面的冶金结合较差;随着钎焊时间的延长,在16 s时接头的结合情况最好,此时抗剪强度最高达到71.25 MPa;时间继续增加时,Ni有充分的时间向界面层扩散与Al结合出现脆性金属间化合物层;当钎焊时间一定时,不同的钎焊温度对接头抗剪强度的影响不大,但是在280℃能够得到成形较好的接头。In the study,Al/Sn-9Zn/Al joints were fabricated with the assistance of Ni-foam reinforced Sn-9Zn composite solder by ultrasound-assisted soldering,effects of ultrasonic vibration time and bonding temperature on the microstructure and mechanical property were analyzed.Experimental observations revealed that the metallurgical bonding of the joint was poor with the short ultrasonic vibration time.When the soldering time was 16 s,excellent joints were obtained and the shear strength reached 71.25 MPa.With further increasing of time,there was sufficient time for Ni to diffuse into the interfacial layer and then the brittle intermetallic compound layer appeared due to the combination of Ni and Al.When the soldering time kept constant,the effect of bonding temperature on the shear strength of the joint was not manifest and robust joints could be acquired at 280℃.

关 键 词：AL合金 SN-9ZN钎料 超声波辅助钎焊 显微组织 抗剪强度 

分 类 号：TG425[金属学及工艺—焊接]