银合金钎料对银触点钎着率影响的研究  

Study on effect of silver brazing filler metals on the brazing rate of silver contacts

作　　者：刘风娅 余翠娟 堵永国[2] 丁勇 彭涛 王乃千 LIU Feng-ya;YU Cui-juan;DU Yong-guo;DING Yong;PENG Tao;WANG Nai-qian(Foshan Noble Metal Technology Co.Ltd.,Foshan 528200,Guangdong,China;College of Aerospace Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]佛山市诺普材料科技有限公司,广东佛山528200 [2]国防科技大学空天科学学院,长沙410073

出　　处：《贵金属》2021年第4期21-26,共6页Precious Metals

摘　　要：以H85黄铜触桥和AgSnO_(2)/Ag触点银层为焊接母材,两种银合金粉末为银合金焊膏的钎料,采用力学性能、金相显微镜、扫描电镜(SEM)和热分析等方法,研究Ag-20Cu-15Zn银合金钎料的粒径和含量,以及Ag-22Cu-17Zn-5Sn钎料对母材焊接钎着率的影响。结果表明,Ag-20Cu-15Zn钎料粒径为45~75μm、含量为60%时焊接钎着率最好,为95.35%;钎料中Sn的加入,使银合金钎料的熔化温度降低60℃,焊接过程中银合金焊膏的流动性增强,对提高焊接钎着率有利。H85 brass contact bridge and silver layer of AgSnO_(2)/Ag contact were used as base materials,two silver alloy powders were used as brazing filler metals of brazing pastes.Mechanical properties,metallographic microscope,scanning electron microscope(SEM)and thermal analysis were used to study the influence of particle sizes,contents of Ag-20Cu-15Zn silver alloy powders and Ag-22Cu-17Zn-5Sn silver alloy powders on brazing rates.The results show that when Ag-20Cu-15Zn silver alloy powders’particle sizes were between 45 to 75μm,content was 60%,the brazing rate was the highest,which is 95.35%;the addition of Sn in the brazing filler metals reduces the melting temperature by 60℃,the fluidity of the silver brazing paste was enhanced during the brazing process,which was beneficial to increase brazing rate.

关 键 词：金属材料 焊膏 银合金粉末 粒径 含量 钎着率 

分 类 号：TG425.2[金属学及工艺—焊接]