Bi元素对SAC305钎料合金组织和性能的影响  

Effect of Bi Element on Microstructure and Property of SAC305 Solder Alloy

作　　者：孟涛[1] 杨莉[1,2] 

机构地区：[1]常熟理工学院机械工程学院,江苏常熟215500 [2]徐州工程学院江苏省大型工程装备检测与控制重点建设实验室,江苏徐州221000

出　　处：《热加工工艺》2015年第7期209-211,共3页Hot Working Technology

基　　金：江苏省自然科学基金资助项目(BK20141228);徐州工程学院江苏省大型工程装备检测与控制重点建设实验室开放课题项目(JSKLEDC201301)

摘　　要：利用金相显微镜和微型拉伸试验机对SAC305-Bi钎料合金的润湿性、组织和力学性能进行了研究。结果表明:SAC305-Bi钎料合金的润湿性随着Bi元素含量的提高而逐渐提高;当Bi元素含量低于0.5wt%时钎料合金的组织几乎不变化,当Bi元素的含量高于0.5wt%时钎料合金的组织粗化,当Bi元素的含量达到4wt%时形成了一种新的共晶相;SAC305-Bi的抗拉强度随着Bi元素含量的提高而逐渐提高,其延伸长度则逐渐降低。The spreadability, microstructure, and mechanical property of SAC305-Bi were studied by optical microscopes and micro tensile tester. The results show that the spreadability of SAC305-Bi improves as the content of Bi increasing. When Bi element content is below 0.5 wt%, the microstructure of solder alloy doesn＇t change almost. When Bi element content is higher than 0.5 wt%, the microstructure of the solder alloy coarsens. When the content of Bi is 4 wt %, a new kind of eutectic phase appears, which is composed with intermetallic compounds and Bi. The tensile strength of SAC305 - Bi increases with the increase of Bi element content, and the extension length decreases gradually.

关 键 词：钎料合金 BI 组织 润湿性 力学性能 

分 类 号：TG425[金属学及工艺—焊接]