摘要
针对2mm厚6005A铝合金采用冷金属过渡(CMT)和熔化极惰性气体保护(MIG)焊接技术进行焊接,研究了两种焊接接头的力学性能、拉伸断口形貌,接头不同位置的微观组织。研究表明,CMT焊接头的抗拉强度好于MIG焊接头,达到母材的70%,焊缝组织更为细小;两种焊接接头断裂位置均为热影响区,CMT焊接接头为韧性断裂,MIG焊接接头为韧性断裂与准解理断裂的混合断裂。
In this paper,cold metal transition(CMT)and molten inert gas protection(MIG)welding technology are used for welding of 2mm thick 6005A aluminum alloy.The mechanical properties,tensile fracture morphology and microstructure of two welded joints are studied.The results show that the tensile strength of cold metal transition welded joints is better than that of MIG welded joints,reaching 70% of the base metal,and the weld structure is finer.The fracture locations of the two welded joints are heat affected zone.The CMT welded joints are ductile fracture,and the MIG welded joints are mixed fracture of ductile fracture and cleavage fracture.
作者
周金旭
李岩
杨宇
林传冬
齐芃芃
张春旭
Zhou Jinxu;Li Yan;Yang Yu;Lin Chuandong;Qi Pengpeng;Zhang Chunxu(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang 111003,China)
出处
《有色金属加工》
CAS
2020年第1期22-25,38,共5页
Nonferrous Metals Processing
基金
国家重点研发计划资助项目(2016YFB0300905)
