Arc Characteristic and Metal Transfer of Pulse Current Horizontal Flux-Cored Arc Welding  

作　　者：Fangjie Cheng Shuai Zhang Xinjie Di Dongpo Wang Jun Cao 

机构地区：[1]School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China [2]Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, China [3]China National Petroleum Offshore Engineering Co., Ltd,Tianjin 300452, China

出　　处：《Transactions of Tianjin University》2017年第2期101-109,共9页天津大学学报（英文版）

摘　　要：In this work, we utilized high-speed video photography to investigate the arc characteristics, metal transfer behavior, and welding spatter of the pulse-current flux-cored arc welding (P-FCAW) process in the horizontal position. The results indicate the presence of a stable “flux pole” during both the pulse-on and pulse-off periods when the mean current ranged from 140 to 170 A. The existence of this “flux pole” was beneficial for droplet transfer in the “axial droplet transfer” mode. With respect to welding spatter, with an increase in the welding current, we observed three kinds of spatter—explosive spatter, rebounded droplet spatter, and scattering spatter. With an increase in the pulse current from 310.6 to 345.6 A, the deflection of the arc reduced from 30.4° to 16.6°, which positively influenced the arc rigidity, particularly in the horizontal position. © 2017, Tianjin University and Springer-Verlag Berlin Heidelberg.In this work, we utilized high-speed video photography to investigate the arc characteristics, metal transfer behavior, and welding spatter of the pulse-current flux-cored arc welding(P-FCAW) process in the horizontal position. The results indicate the presence of a stable ‘‘flux pole'' during both the pulse-on and pulse-off periods when the mean current ranged from 140 to 170 A. The existence of this ‘‘flux pole'' was beneficial for droplet transfer in the‘‘axial droplet transfer'' mode. With respect to welding spatter, with an increase in the welding current, we observed three kinds of spatter—explosive spatter,rebounded droplet spatter, and scattering spatter. With an increase in the pulse current from 310.6 to 345.6 A, the deflection of the arc reduced from 30.4° to 16.6°, which positively influenced the arc rigidity, particularly in the horizontal position.

关 键 词：Bridge decks DROPS Electric arc welding Flux cored arc welding (FCAW) High speed cameras High speed photography POLES Welding 

分 类 号：TG403[金属学及工艺—焊接]