Sn-9Zn系无铅焊料钎焊接头剪切性能的研究  

Study on Shear Property of Brazed Joints of Sn-9Zn System Lead-free Solders

作　　者：吕娟[1] 赵麦群[1] 康晶[1] 吕海霞[2] 佟玉飞[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048 [2]长庆油田第一采气厂工艺研究所,陕西靖边718500

出　　处：《金属功能材料》2010年第3期72-75,共4页Metallic Functional Materials

基　　金：陕西省自然科学研究计划项目基金(编号:2002E111)

摘　　要：利用扫描电镜及万能材料实验机研究了Sn-9Zn/Cu钎焊接头的界面形貌及Sn-9Zn焊料微合金化前后钎焊接头的剪切性能变化。结果表明,Sn-9Zn/Cu界面金属间化合物为Cu5Zn8,界面层呈平整的锯齿状。由于焊接时没有保护气氛,以致Sn-9Zn氧化而使剪切性能变差,而同时添加微量RE和Ag或RE和Al元素后剪切强度大幅度增高,尤其是添加0.025%RE和0.3%Ag时剪切强度可提高46.47%,同时添加元素后剪切断口韧性断裂趋势增大。By means of scanning electron microscope and universal material machine,the interfacial morphology of Sn-9Zn brazed joint was observed,meanwhile,the shear properties of brazed joint of Sn-9Zn system solder were studied.The results show that interface layer（IMC） between Sn-9Zn solder and Cu is leveling serrate consisting of Cu5Zn8.The oxidation of Sn-9Zn decreased its shear property without gas protection.Simultaneous addition of rare RE and Ag or RE and Al could greatly improve the shear strength of brazed joints,especially when adding 0.025%RE and 0.3%Ag,the shear strength could improve 46.47%.And the toughness fracture features of solder shear fracture surface were increased with the addition of these elements.

关 键 词：无铅焊料 界面形貌 剪切性能 微合金化 

分 类 号：TG425.1[金属学及工艺—焊接]