High Efficiency and Quality of Multi-Pass Tandem Gas Metal Arc Welding for Thick Al 5083 Alloy Plates

作     者：JIANG Zhao HUA Xueming HUANG Lijin WU Dongsheng LI Fang CAI Yan 姜朝;华学明;黄立进;吴东升;李芳;蔡艳

作者机构：Shanghai Key Laboratory of Materials Laser Processing and Modification Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong University 

出 版 物：《Journal of Shanghai Jiaotong university(Science)》 (上海交通大学学报（英文版）)

年 卷 期：2019年第24卷第2期

页      面：148-157页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080706[工学-化工过程机械] 080503[工学-材料加工工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 082003[工学-油气储运工程] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the National Natural Science Foundation of China(No.51475297) the Fund of the Ministry of Industry and Information Technology of China Under the Project of LNG Shipbuilding 

主　　题：multi-pass welding tandem gas metal arc welding(TGMAW) welding efficiency porosity microstructure mechanical property 

摘      要：Multi-pass tandem gas metal arc welding(TGMAW) for Al 5083 alloy plates with 30 mm thickness is carried out to study its high efficiency and high quality. The welding process is evaluated by high-speed photographs and electrical signals. The deposition rate and welding time are calculated to characterize the welding efficiency. The bead formation, porosity, microstructure and mechanical properties are tested and analyzed. The results indicate that though arc deflection occurs due to the electromagnetic interference between two arcs during TGMAW process, it does not affect the welding process stability significantly. The deposition rate and welding time of TGMAW process are about 15 g/min larger and about 16.7% less than those of gas metal arc welding(GMAW)process respectively, accompanied by the reduction of heat input. The TGMAW welded joint has less porosity and more refined microstructure to contribute to the improvement of mechanical properties(micro-hardness, tensile strength and ductility). It can be concluded that TGMAW process yields excellent performance of welded joint with improved welding efficiency, which makes it extremely practical during welding of thick plates.