Al-Si-Cu-Ge钎料性能的研究  

Properties of Al-Si-Cu-Ge filler metal

作　　者：张晓丽[1] 贺定勇[1] 李晓延[1] 李冉[1] 蒋建敏[1] 

机构地区：[1]北京工业大学材料科学与工程学院,100124

出　　处：《焊接》2009年第11期28-30,共3页Welding & Joining

基　　金：北京市属市管高等学校人才强教计划资助项目"环境协调连接材料与加工技术"学术创新团队计划资助

摘　　要：通过熔炼方法制备了一系列不同Ge含量的低熔点的Al-Si-Cu-Ge钎料。利用示差扫描量热仪(DSC)对钎料的熔化区间及显微组织进行分析和判定;研究上述钎料的铺展性能并通过感应钎焊方法实现2A12的焊接;通过接头抗剪强度评价钎料的力学性能。结果表明,加入Cu、Ge能够显著降低钎料熔点;能够与Al形成化合物,从而降低表面张力,极大地改善钎料的润湿性能;但随着Ge含量的增加,由于焊缝中脆性相的增加,导致焊后接头抗剪强度下降。A series of Al-Si-Cu-Ge filler metals with low melting point were developed though melting method in resistance furnace.The melting temperatures,microstructure,wettability,mechanical properties were measured and analyzed.The results showed that the melting temperatures of the new-type filler metals can be reduced a lot;The wettability is improved significantly because of the reduction of the surface tension; Along with the increase of Cu and Ge content,there generate several kinds of intermetallic compounds in the brazed seam,which make the shear strength be decreased gradually.

关 键 词：Al-Si-Cu-Ge低熔点钎料感应钎焊2A12硬铝合金 

分 类 号：TG454[金属学及工艺—焊接]