摘要
在SnBi36Ag0.5无铅焊料合金的基础上,添加Ce元素,研究Ce含量对合金显微组织、熔化特性、润湿性和力学性能的影响。按质量比将纯Sn球、Bi锭、Ag锭和中间合金SnCe1.8在400℃熔化,保温6 h。搅拌均匀后在320℃浇铸,制备成SnBi36Ag0.5Cex(x=0%,0.03%,0.07%,0.1%,0.3%)焊料合金。通过X射线衍射仪对合金进行物相分析,通过扫描电镜(SEM-EDS)和光学金相显微镜(OM)分析焊料合金的显微组织,通过差示扫描量热分析仪(DSC)表征焊料合金熔化特性,通过可焊性测试仪表征焊料的润湿性,采用万能材料试验机测试焊料合金的力学性能。结果表明:Ce能起到细化组织的作用使脆硬的富Bi相更加细小均匀。Ce的添加会导致熔点和熔程有轻微上升。当Ce含量为0.07%时润湿时间最短,润湿力最大,综合润湿性最佳。当Ce含量为0.07%时有最高的抗拉强度和延伸率。
On the basis of SnBi36Ag0.5 lead-free solder alloy,the effects of Ce content on microstructure,melt⁃ing properties,wettability and mechanical properties of the solder alloy were investigated.SnBi36Ag0.5Cex(x=0%,0.03%,0.07%,0.1%,0.3%)solder alloys were prepared by pure tin,bismuth ingot,silver ingot and in⁃termediate alloy SnCe1.8 at 400℃according to mass ratio after holding for 6 h stirring evenly and cast at 320℃.The phases of the alloy were analyzed by X-ray diffractometer,The microstructure of solder alloy was an⁃alyzed by scanning electron microscopy(SEM)and optical metallography(OM),the melting characteristic of solder alloys were characterized by differential scanning calorimetry(DSC),the wettability of solder was charac⁃terized by solderability tester,and the mechanical properties of solder alloy were tested by universal material tes⁃ter.The results show that Ce can refine the microstructure and make the Bi rich phase finer and more uniform.The addition of Ce will lead to a slight increase in the melting point and melting range.When the content of Ce is 0.07%,the wetting time is the shortest,the wetting force is the largest,and the comprehensive wettability is the best.The highest tensile strength and elongation were obtained when the content of Ce was 0.07%.
作者
朱文嘉
徐凤仙
张欣
秦俊虎
卢红波
王成亮
唐丽
Zhu Wenjia;Xu Fengxian;Zhang Xin;Qin Junhu;Lu Hongbo;Wang Chengliang;Tang Li(Yunnan Tin Products Manufacturing Co.,Ltd.,Kunming 650501,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《中国稀土学报》
EI
CAS
CSCD
北大核心
2022年第2期261-267,共7页
Journal of the Chinese Society of Rare Earths
基金
云南省科技计划重点项目(2018ZE004)资助。
