铝合金双面搅拌摩擦焊初步研究  

Al Alloy Bi-friction Stirring Welding

作　　者：黄华[1] 董仕节[1] 刘静[2] 吴勇[1] 

机构地区：[1]湖北汽车工业学院 [2]武汉科技大学

出　　处：《特种铸造及有色合金》2006年第7期400-402,共3页Special Casting & Nonferrous Alloys

基　　金：湖北省教育厅创新团队资助项目(鄂教科[2003]7号)

摘　　要：提出了双面搅拌摩擦焊这种新的焊接方法,对比研究了6K32-T4铝合金搅拌摩擦焊与双面搅拌摩擦焊接头的组织和硬度,并对双面搅拌摩擦焊焊缝进行了XRD分析。研究发现:铝合金双面搅拌摩擦焊与搅拌摩擦焊焊缝组织分区相同;双面搅拌摩擦焊焊缝的硬度略低于搅拌摩擦焊,且焊缝硬度下降区域范围更大;双面搅拌摩擦焊后焊缝依然保持为原有相组成;双面搅拌摩擦焊比搅拌摩擦焊焊接线能量更大,采用双面搅拌摩擦焊代替搅拌摩擦焊有利于提高焊接效率并消除焊缝隧道型缺陷、改善焊缝的性能。A new welding method of bi-friction stirring welding has been proposed. Microstructure and hardness of 6K32-T4 aluminum alloy joint in friction stirring welding (FSW) and in bi-friction stirring welding (Bi-FSW) have been compared, meanwhile the joint in Bi-FSW has been observed by XRD. The results show that microstructure distribution of the joint in Bi-FSW is identified with that of in FSW. However, the hardness in Bi-FSW is slightly lower than that in FSW, in which the declined area of the hardness in bi-FSW is larger than that of in FSW. Change of the phase constituent of the joint after bi-FSW is not observed. Using bi-FSW instead of FSW is beneficial to improving the welding efficiency and to eliminating tunnel-like joint defects due to higher linear energy, improving properties of the joint.

关 键 词：双面搅拌摩擦焊 搅拌摩擦焊 金相组织 

分 类 号：TG453.9[金属学及工艺—焊接]