采用复合钎料的铝合金中温真空钎焊技术  

Intermediate temperature vacuum brazing of aluminum alloy with a composite solder

作　　者：程耀永[1] 吴欣[1] 毛唯[1] 叶雷[1] 陈波[1] 周媛[1] 

机构地区：[1]北京航空材料研究院焊接及锻压工艺研究室,100095

出　　处：《焊接》2009年第4期32-35,共4页Welding & Joining

摘　　要：为解决铝合金中温钎焊时难以制备出实用的钎料问题,设计制备了厚度0.1～0.2 mm的Al-Si-Cu复合钎料箔带,钎料呈三明治状叠层结构,具有与普通Al-Si钎料同样的塑性,液相线温度541℃。该复合钎料可方便地用于铝合金实际结构的中温真空钎焊。工艺及性能试验结果表明,钎料具有良好的钎焊工艺性,钎焊2A50接头平均剪切强度172 MPa,并成功用于2A50叶轮结构的真空钎焊。A composite brazing filler metal of Al-Cu-Si alloy was newly developed for aluminum alloy brazing at an Intermediate Temperature. The brazing filler metal was rolled in form of foil with thickness of 0.1～0.2 mm with a sandwich structure.It shows the liquidus temperature of 541 ℃.It has the same plastic property as the popular Al-Si fillers,and can be used for practical brazing.The results of brazing process and joint property test show that the brazing filler metal has a satisfactory performance of vacuum brazing of 2A50 alloy.The average shear strength of 172 MPa was achieved for 2A50-T6 joints.It has been successfully used for 2A50 vane wheel brazing.

关 键 词：铝合金 低熔点钎料 真空钎焊 

分 类 号：TG454[金属学及工艺—焊接]