金合金锡铅软钎焊接头脆性行为  

Brittle behavior of gold alloy joint soldered with tin-lead solder

作　　者：尹娜[1] 曲文卿[1] 杨淑娟[1] 李睿[2] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京控制工程研究所,北京100080

出　　处：《北京航空航天大学学报》2013年第5期670-673,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：采用Sn63Pb37钎料对Au60AgCu合金进行钎焊试验.对钎焊接头的微观组织、显微硬度、化合物相成分、力学性能及断口形貌进行了分析,并探讨了界面化合物相对接头脆性的影响.结果表明:Au60AgCu合金接头化合物主要由AuSn2,AuSn4和Ag3Sn组成.金属间化合物的硬度很高,其厚度随钎焊温度的升高及保温时间的增长而增厚.钎焊接头剪切性能测试表明,断裂发生在金属间化合物层,断口形貌为脆性断裂.Soldering of Au60AgCu using tin-lead solder was performed in the experiment. The soldering joint of microstructure, micro-hardness, phase composition, mechanical properties and fracture morphology were analyzed, and the effect of interface intermetallic compound on joint brittleness was discussed. It was found that the compound of Au60AgCu alloy soldering joint was composed of AuSn2 , Ag3Sn and AuSn4. With increasing the soldering temperature and/or time, the thickness of intermetallic compound was obviously in- creased. The hardness of intermetallic compound was high. The soldering joint of shear mechanical property test indicates that fracture occurred in the intermetallic compound layer, and the fracture morphology is brittle fracture.

关 键 词：Au60AgCu合金 锡铅钎料 金属间化合物 脆性断裂 

分 类 号：V252.3[一般工业技术—材料科学与工程]