Study of Droplet Transfer and Fluctuation of Weld Pool for Flux Bands Constricting Arc Welding of Sandwich Plates
QIAO Jisen1,2,*, YANG Yuanzhuang1,2, WANG Lei1,2, GAO Zhenyun1,2, FENG Rui1,2
1 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Abstract: Since it is always a challenge to detect the instability of weld pool during flux bands constricting arc welding process (FBCA) for high-strength steel sandwich plates, a new test by means of a side sticking high-temperature quartz glass has been used to collect the information of wel-ding process on line, which was driven to extract the edge curve of weld pool and its geometrical parameters. In addition that, a research has been carried out about the droplet transfer modes and the fluctuation of the edge curve of weld pool dynamically. Meanwhile the relationship between the oscillation angle of the weld pool and the welding stability was also analyzed. The results show that there are at least six different modes of droplet transfer with various welding parameters, which are short circuiting transfer, globular transfer, repulsion transfer, fine transfer, projected transfer, and arc bridge coexistence transfer. Their influence on the weld pool fluctuation in the core plate is weakened in a sequence. Along with the changing of the oscillation angle of the weld pool, the edge curve of weld pool shows specially the mixed U-shape, the deep U-shape and the shallow U-shape as well, and the stability of burning arc increases in a sequence. Especially, when the metal transfer is arc bridge coexistence, the weld pool shows a shallow U-shape. In this way, the arc will burn stably with homologous electromagnetic forces attached, and the welding process will be good for qualified joint mechanical properties following.
乔及森, 杨元庄, 王磊, 高振云, 冯睿. 焊剂片约束电弧焊接三明治板熔滴过渡与熔池波动研究[J]. 材料导报, 2023, 37(2): 21050032-8.
QIAO Jisen, YANG Yuanzhuang, WANG Lei, GAO Zhenyun, FENG Rui. Study of Droplet Transfer and Fluctuation of Weld Pool for Flux Bands Constricting Arc Welding of Sandwich Plates. Materials Reports, 2023, 37(2): 21050032-8.
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2023, Vol. 37 
