Ga元素含量对银钎料组织及性能的影响  

Effect of Ga content on properties and microstructure of Agbased filler metal

作　　者：马超力 薛松柏[1] 顾荣海[1] 王博[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《焊接学报》2017年第12期14-18,共5页Transactions of The China Welding Institution

基　　金：江苏高校优势学科建设工程资助项目;国家自然科学基金项目(51375233)

摘　　要：研究了Ga元素的添加对B17Ag Cu Zn Sn钎料固液相线温度、铺展性能、显微组织以及钎焊接头抗拉强度的影响规律.采用火焰钎焊方法,得到H62黄铜与304不锈钢的对接接头.结果表明,随着Ga元素含量的增加,B17Ag Cu Zn Sn钎料固液相线温度出现下降,在母材表面的铺展性能有所上升,B17Ag Cu Zn Sn-2Ga钎料铺展试验中出现"润湿环"现象.Ga元素的添加改善了银钎料的显微组织,当Ga元素质量分数为2%时B17Ag Cu Zn Sn钎料组织细小均匀.此外,采用该系列钎料钎焊黄铜和不锈钢时,得到了致密无缺陷的钎焊接头,当B17Ag Cu Zn Sn钎料中Ga元素质量分数为2%时,钎焊接头的抗拉强度达到最大值387.2 MPa.The influence of Ga content on the melting temperature,spreading property,microstructure and mechanical property of Ag-based filler metal was analyzed. Butt joints between H62 brass and 304 stainless steel were made with flame brazing process. The results indicated that the melting temperature of Ag-based filler metal was reduced and the spreadability was improved while increasing Ga content. A wetting ring was found when B17 Ag Cu Zn Sn-2 Ga filler metal spread on 304 stainless steel. The microstructure of Ag-based filler metal was refined significantly with increase of Ga content. Besides, the maximum joint strength could reach 387. 2 MPa while the Agbased filler metal contained 2% Ga.

关 键 词：银钎料 熔化温度 显微组织 力学性能 

分 类 号：TG425[金属学及工艺—焊接]