Ag-Cu-Sn三元合金钎料的快速凝固组织与性能  

Microstructure and properties of rapidly solidified Ag-Cu-Sn ternary brazing fillers

作　　者：徐锦锋[1] 张晓存[1] 党波[1] 戴卫刚 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]常熟市双华电子有限公司,江苏常熟215500

出　　处：《焊接学报》2011年第2期85-88,117,共4页Transactions of The China Welding Institution

基　　金：陕西省工业基金资助项目(2009K306-14);陕西省重点学科建设专项资金资助项目

摘　　要：采用熔体急冷法制备出Ag42.47Cu57.53-xSnx(x=12.23,12.94,13.65,质量分数,%)急冷钎料箔材,分析了钎料的相组成、组织形态、电阻率和力学性能.结果表明,急冷钎料由(Ag),α-Cu及少量Cu13.7Sn相组成.随着锡含量的增加,凝固组织显著细化,晶界增多,溶质截留加剧,电阻率增大;细晶强化和固溶强化作用增强,合金的抗拉强度升高,Rm=280～360 MPa,断后伸长率则相应减小,A=2.8%～5%.急冷钎料的固、液相线温度分别为TL=590～616℃和TS=615～622℃,锡含量的增大使合金凝固温度区间有所增大.The phase constitution,morphology,electrical resistivity and mechanical properties of Ag42.47Cu57.53-xSnx(x=12.23,12.94,13.65,mass fraction %) prepared by melt-spun method are investigated.The results indicate that the microstructure of the alloys consists of(Ag),α-Cu and a few of Cu13.7Sn phases;with the rise of tin content,the electrical resistivity increases for refining of the microstructure and increasing of grain boundary amount and solute-trapping;on the other hand,fine crystal strengthening and solution hardening will result in the increment of tensile strength from 280 to 360 MPa,but the elongation reduces from 5 % to 2.8%.The ranges of solidus and liquidus temperature of those alloys are 590 to 616 ℃ and 615 to 622 ℃ respectively,and the temperature range increases with the increasing of tin content.

关 键 词：三元合金 急冷钎料 快速凝固 微观组织 性能 

分 类 号：TG425[金属学及工艺—焊接]