Effects of welding voltage on process stability in hyperbaric gas metal arc welding  

作　　者：李凯 高洪明 李海超 

机构地区：[1]State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology,Harbin, 150001.

出　　处：《China Welding》2014年第1期70-74,共5页中国焊接（英文版）

摘　　要：Based on hyperbaric gas metal arc welding （GMAW） experiments at ambient pressure of 0. 8 MPa, the process stability of different welding voltages was studied. The experiments were carried out with a high speed camera system including infrared laser backlight and electric signal acquisition system. Keeping wire feed speed at 8 m/min, arc length increases linearly with the increase of welding voltage in O. 8 MPa argon environment. Under this condition, all the metal transfer modes are droplet repelled transfer and the transfer frequency increases with increasing welding voltage. The number of deviating spatter is less with relatively high welding voltage. The results of electric signal waveforms show that the probabilities of short circuit and arc interruption decrease firstly and then increase with increasing welding voltage. When the welding voltage is 37 V, the hyperbaric welding process is the most stable with no probability of short circuit and arc interruption.Based on hyperbaric gas metal arc welding （GMAW） experiments at ambient pressure of 0. 8 MPa, the process stability of different welding voltages was studied. The experiments were carried out with a high speed camera system including infrared laser backlight and electric signal acquisition system. Keeping wire feed speed at 8 m/min, arc length increases linearly with the increase of welding voltage in O. 8 MPa argon environment. Under this condition, all the metal transfer modes are droplet repelled transfer and the transfer frequency increases with increasing welding voltage. The number of deviating spatter is less with relatively high welding voltage. The results of electric signal waveforms show that the probabilities of short circuit and arc interruption decrease firstly and then increase with increasing welding voltage. When the welding voltage is 37 V, the hyperbaric welding process is the most stable with no probability of short circuit and arc interruption.

关 键 词：underwater welding hyperbaric GMAW welding vohage 

分 类 号：TG403[金属学及工艺—焊接] TQ117[化学工程—无机化工]