Al-Si-Cu-Zn急冷钎料钎焊铝及铝合金的界面结构及强度  

Microstructure and strength of aluminum and aluminum alloy joint brazed with rapidly-cooled Al-Si-Cu-Zn filler metals

作　　者：邹家生[1] 吕思聪[1] 赵宏权[1] 罗新锋[1] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《焊接学报》2008年第3期77-80,共4页Transactions of The China Welding Institution

基　　金：江苏省高校自然科学基金资助项目(06KJB430028);江苏省青蓝工程项目

摘　　要：采用Al70Si7.5Cu20Zn2.5和Al65Si10Cu20Zn5两种急冷钎料钎焊L2纯铝和6063铝合金,研究钎焊接头的界面微观结构和力学性能。结果表明,急冷钎料钎焊接头由母材、界面区和钎缝中心组成。界面区为αAl固溶体,钎缝中心组织为αAl固溶体+θ(Al2Cu)相+Si相。采用Al65Si10Cu20Zn5急冷钎料钎焊的接头抗剪强度均高于Al70Si-7.5Cu20Zn2.5急冷钎料钎焊的接头强度;匹配氯化物钎剂钎焊的接头强度均高于氟化物钎剂。在相同的工艺条件下,采用急冷钎料钎焊的L2纯铝接头,其抗剪强度都明显高于相应的常规钎料,其增加值在40%左右。The microstructure and strength of aluminum and 6063 aluminum alloy joints brazed with Al70Si7.5Cu20Zn2.5 and Al65Si10Cu20Zn5 rapidly-cooled filler metals were studied. The result indicates that the brazed joint is composed of base metal, center of brazing seam and interface region. The microstructure of interface is α Al solid solutions, while the center of brazing seam is α Al solid solutions, Si and θ(Al 2Cu). The resnlt also indrcates that the strrength of the joint brazed with Al65Si10Cu20Zn5 is higher that the one brazed with Al70Si 7.5 Cu20Zn2.5, and the strength of the joint using chloride flux is hgher that the one usding fluoried flux. Under the same technological conditions, shear strength of aluminum joint brazed with rapidly cooled fillers is better than the one of conventional fillers, which increased about 40%.

关 键 词：Al-Sl-Cu-Zn 急冷钎料 铝及铝合金 界面结构 抗剪强度 

分 类 号：TG453[金属学及工艺—焊接]