2024-T4铝合金薄板的超声辅助搅拌摩擦焊研究  

Study on Ultrasonic-assisted Friction Stir Welding of 2024-T4 Aluminum Alloy

作　　者：贺地求[1] 祝建明[1] 杨坤玉[1] 叶绍勇[1] 

机构地区：[1]中南大学现代复杂装备设计与极端制造教育部重点实验室,湖南长沙410083

出　　处：《热加工工艺》2013年第17期180-182,185,共4页Hot Working Technology

基　　金：江苏省无线传感系统应用工程技术开发中心校企合作项目(2011-12)

摘　　要：分别用搅拌摩擦焊(FSW)和超声辅助搅拌摩擦焊(UAFSW)两种方法对1.8 mm 2024-T4铝合金进行对接焊接,并对焊缝的微观组织和力学性能进行了分析比较。结果表明:FSW和UAFSW两种方法焊接的1.8 mm 2024-T4铝合金均可得到成型美观、内部无缺陷的焊缝,但UAFSW的焊缝力学性能优于FSW;在其它条件相同时,FSW的焊接强度达母材的74.14%,UAFSW的焊接强度可达到母材82.83%。金相组织分析表明,UAFSW焊缝区组织比FSW的更均匀,晶粒更细小。The microstructure, physical property of 2024-T4 aluminum alloy welded by friction stirring welding and ultrasonic-assisted friction stir welding was compared. The results show that the welded joints of 2024-T4 aluminum welded by two technology are both with good appearance and detect-free in the inner, but ultrasonic-assisted friction stir welding has better weld mechanical properties, with the most appropriate parameters, the tensile strength of aluminum alloy friction stir welding can reach 74.14% of that of base metal while the tensile strength of aluminum alloy ultrasonic-assisted friction stir welding can achieve 82.83% of that of base metal. The microstructure analysis shows that the microstructure of ultrasonic- assisted friction stir welding is more uniform and fine.

关 键 词：超声辅助搅拌摩擦焊 搅拌摩擦焊 2024 T4铝合金 

分 类 号：TG453[金属学及工艺—焊接]