Comparative study of hybrid laser-MIG leading configuration on porosity in aluminum alloy bead-on-plate welding

被引：26
作者：
Miao, Haibin [1 ,2 ]
Yu, Gang [1 ,2 ]
He, Xiuli [1 ,2 ]
Li, Shaoxia [1 ,2 ]
Chen, Xuyang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2017年 / 91卷 / 5-8期
基金：
中国国家自然科学基金;
关键词：
Laser-MIG hybrid welding; A7N01 aluminum alloy; Leading configuration; Porosity; FORMATION MECHANISMS; FIBER LASER; ARC; KEYHOLE; MICROSTRUCTURE; PARAMETERS; REDUCTION; DYNAMICS; AA5083; FLOW;
D O I：
10.1007/s00170-016-9917-1
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Laser-metal inert gas (MIG) welding is a promising welding technology, which presents many attractive properties. However, porosity still remains a serious problem in laser-MIG welding of aluminum. In this experimental study, the effect of leading configuration on porosity formation and distribution in laser-MIG bead-on-plate welding of A7N01 alloy was investigated. Experiments on arc current, welding speed, and arc configuration were performed comparatively for two leading configurations, respectively. The welds were analyzed with X-ray photographs and cross-section observations. Pores in laser-MIG-welded samples were mainly keyhole-induced. The concept of porosity area fraction was used to evaluate the severity of pore defect. The maximum porosity area fraction presented at different arc currents in the two leading configurations (in laser leading welding, it is 150 A, while in arc leading welding, it is 110 A). With welding speed increasing, porosity area fraction decreased. Bubble escape condition was deduced and used to discuss the probable mechanism of the effect of leading configuration on pore formation. The results showed that leading configuration was considerable in porosity minimization and prevention.
引用
收藏
页码：2681 / 2688
页数：8
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