Arc characteristics and properties of a new rotating tungsten GTAW of 5A06 aluminum alloy  

作　　者：Rongmao Du Yanlong Fan Yu Sun Hongtao Zhang Zecheng Wu 

机构地区：[1]Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology at Weihai,Weihai 264209,China [2]State Key Laboratory of Precision Welding&Joining of Materials and Structures,Harbin Institute of Technology,Harbin 150001,China

出　　处：《China Welding》2025年第1期39-44,共6页中国焊接(英文版)

基　　金：supported by National Natural Science Foundation of China(52175305);National Natural Science Foundation of China(U22B20127);Taishan Scholars Project(tstp20230618).

摘　　要：In this study,the rotary movement of the tungsten needle in gas tungsten arc welding(GTAW)process was realized by direct current motor.The arc characteristics,the flow of molten pool and the microstructure and properties of the weld bead were studied.The results showed that the rotary motion of the tungsten needle transferred circumferential momentum to the arc as well as the molten pool,thereby conferring the latter with rotating fluid flow characteristics.Under the action of a relatively spiraling shielding gas,arc constriction occurred,and molten pool width dropped considerably.A finer and more uniform precipitated phase in the matrix,as well as a fewer large-medium pores,were achieved in the 5A06 aluminum alloy weld metal using this modified GTAW process,which noticeably increased the bending strength and tensile strength of weld metal and the microhardness of fusion zone.

关 键 词：Roating tungsten Arc shape Molten pool Gas tungsten arc welding 

分 类 号：TG444[金属学及工艺—焊接]