SnBi36Ag0.5Sbx焊料合金组织与性能  

Study on microstructure and properties of SnBi36Ag0.5Sbx solder alloy

作　　者：朱文嘉 赵中梅 龙登成 张欣 秦俊虎 卢红波 ZHU Wenjia;ZHAO Zhongmei;LONG Dengcheng;ZHANG Xin;QIN Junhu*;LU Hongbo(Yunnan Tin New Material Co.,Ltd.,Kunming 650501,China)

机构地区：[1]云南锡业新材料有限公司,昆明650501

出　　处：《有色金属科学与工程》2023年第4期536-542,共7页Nonferrous Metals Science and Engineering

基　　金：云南省高层次科技人才及创新团队选拔专项-创新团队项目(202105AE160028)。

摘　　要：向SnBi36Ag0.5合金中加入不同含量的Sb元素,按设计的质量比将Sn、Bi、Ag、Sb纯金属在450℃熔化,保温6 h、320℃浇铸,制备成SnBi36Ag0.5Sbx(x=0.3、0.7、1.0、1.5、2.0)焊料合金。并对合金的显微组织、相成分、熔点、润湿性、力学性能进行表征,研究Sb含量对合金性能的影响。结果表明该合金由网状Bi相、基体Sn相、颗粒状和短杆状的富Bi相、Ag3Sn构成。在一定范围内,Sb元素绝大部分固溶于Sn基体相中,难以析出SnSb化合物。Sb的添加使合金的液相线温度和熔程明显提高。随着Sb含量增高,润湿时间越长,润湿力越低,润湿性能下降。当Sb含量为2%时,抗拉强度最高值为97.09 MPa。添加少量的Sb对Sn-Bi系中Bi合金焊料性能产生明显影响。SnBi36Ag0.5Sbx(x=0.3,0.7,1.0,1.5 and 2.0)solder alloy was prepared by melting pure Sn,Bi,Ag,Sb at 450℃ for 6 h and then casting at 320℃ according to the mass ratio.The microstructure,phase composition,melting point,wettability,and mechanical properties of the alloy were characterized to study the effect of Sb content on the properties of the alloy.The results showed that the alloy was composed of reticulated Bi phase,matrix phase of Sn,granular and short rod-shaped Bi-rich phase,and Ag3Sn compound.In a certain range,most Sb elements solutionized in the matrix phase of Sn rather than as the SnSb compound liberation.The liquidus temperature and melting range of the alloy were increased by the addition of Sb.With increasing Sb content,the wettability decreased due to the worse wetting time and the wetting force.When the Sb content was 2%,the maximum tensile strength was 97.09 MPa.The addition of a small amount of Sb can significantly affect the properties of the Bi alloy solder in the Sn-Bi system.

关 键 词：SnBi36Ag0.5Sbx焊料合金 显微组织 润湿性 力学性能 

分 类 号：TG425[金属学及工艺—焊接]