6061铝合金超声波焊接接头组织与性能研究
Microstructure and Properties of 6061 Aluminium Alloy Welded Joint by Ultrasonic Welding
熊志林，朱政强，吴宗辉，王小龙
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作者单位：南昌大学 机电工程学院，江西 南昌330031
中文关键字：6061铝合金；超声波焊接；组织；力学性能
英文关键字：6061 aluminum alloy; ultrasonic; microstructure; mechanical properties
中文摘要：采用超声波焊接方法对0.3 mm厚的6061铝合金进行焊接,焊后利用光学显微镜和扫描电镜对焊接接头组织和表面形貌进行分析,重点研究了试样表面处理、焊接时间及焊接压力对焊后铝合金剥离强度和硬度的影响。结果表明：在焊接时间120 ms,焊接压力17.5 MPa下,表面加乙醇处理的试样剥离力最高达到136.478N,硬度53.9HV；同时,焊缝平整规则,界面结合良好。
英文摘要：6061 aluminum alloy with the thickness of 0.3 mm was welded by ultrasonic welding. The microstructure and surface morphology of the ultrasonic welded joint were analyzed. The variation of the peeling loads and hardness of welding specimens under the state of aluminum surface treatment,welding time and welding pressure were studied. The experimental results indicate that the peeling loads is up to 136.478 N and hardness is up to 53.9 HV under the welding time 120 ms,welding pressure 17.5 MPa and the surface of specimen in ethanol. Meanwhile, the weld is flat, the interface bonding is good.