摘要
采用超声振动强化搅拌摩擦焊接工艺实现了6 061-T6铝合金和Q235钢异种金属的有效连接,考察了超声能量对焊缝成形、接头组织、力学性能以及焊接载荷的影响.结果表明,施加超声能量可以显著改善焊缝表面成形,增加铝/钢界面区和焊核区的宽度.超声振动细化了焊核区和热力影响区的晶粒组织,改变了搭接接头的断裂机制和断裂位置,提高了接头的力学性能.对焊接过程中焊接载荷的变化进行分析,发现施加超声能量后搅拌头扭矩、焊接轴向力和主轴输出功率均有所下降.
The effective connection between 6061-T6 aluminum alloy and Q235 steel was realized by ultrasonic vibration enhanced friction stir welding(UVe FSW) process. The effects of ultrasonic energy on weld formation, joint microstructure, mechanical properties and welding load were investigated. The results show that the application of ultrasonic energy can significantly improve the weld surface forming and expand the width of aluminum/steel interface zone and weld nugget zone. Ultrasonic energy refines the grain structure of weld nugget zone and thermal mechanically affected zone,changes the fracture mechanism and cracking location of lap joint, improves the mechanical properties of joint. The variation of welding loading during welding was analyzed. It is found that the tool torque, the welding axial force and the spindle power decrease after applying ultrasonic energy.
作者
刘涛
高嵩
肖光春
吴程浩
石磊
孙志平
LIU Tao;GAO Song;XIAO Guangchun;WU Chenghao;SHI Lei;SUN Zhiping(Qilu University of Technology(Shandong Academy of Sciences),Jinan,250353,China;Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(MOE),Shandong University,Jinan250061,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2022年第5期69-75,I0007,I0008,共9页
Transactions of The China Welding Institution
基金
山东省自然科学基金(ZR2020QE177,ZR2021ME250)。
关键词
搅拌摩擦焊
超声能量
铝/钢
组织与性能
焊接载荷
friction stir welding
ultrasonic energy
aluminum/steel
microstructure and properties
welding loads
