Arc characteristics and metal transfer process of hybrid laser double GMA welding

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• 作者：H. L. Wei (1)
  H. Li (1)
  L. J. Yang (1)
  Y. Gao (2)
  X. P. Ding (1)
  
  1. Tianjin Key Laboratory of Advanced Joining Technology ; Tianjin University ; Tianjin ; 300072 ; China
  2. Tianjin key Laboratory of High Speed Cutting and Precision Machining ; Tianjin University of Technology and Education ; Tianjin ; 300222 ; China
  
• 关键词：Laser ; Double GMA ; Hybrid welding ; Alternative arcing
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：77
• 期：5-8
• 页码：1019-1028
• 全文大小：4,716 KB
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• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

Hybrid laser gas metal arc (GMA) welding can provide higher productivity than either autogenous laser welding or GMA welding alone. In order to further enhance the welding efficiency of the hybrid laser arc welding process, a novel triple-heat-source welding system entitled hybrid laser double GMA welding was proposed in this study. This hybrid welding system was established based on a double GMA welding and laser welding system. During the hybrid welding process, two consumable electrodes kept alternative arcing at relatively low welding current while they changed to arc synchronically at relatively high welding current. This research is mainly focused on the mechanism of the alternative arcing phenomena and the influences of wire feed speed and laser beam on the arc alternating process. It was found that the arcing period decreased with the increase of wire feed speed which was positively correlated with the welding current. The arcing period also decreased with the introduction of the laser beam into the arc welding system. The arcing period can be decreased as short as possible until it was equal to the pulse period of the welding power source. Based on the analysis of the driving forces acting within the molten weld pool, it can be inferred that the hybrid laser double GMA welding process could be in favor of homogeneous alloying elements distribution and weld metal microstructure.