Droplet transition for plasma-MIG welding on aluminium alloys

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 12; pp. 2234 - 2239
• Main Author: 白岩 高洪明 邱灵
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2010; Institute for Welding and Surface Technology of R&D Center, Baoshan Iron & Steel Co., Ltd.,Shanghai 201900, China%State Key Lab of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China%Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China
• Subjects: Alloys; aluminum alloy; Aluminum base alloys; droplet transition; Droplets; Gas metal arc welding; high speed photography; MIG焊; Plasma arc welding; plasma MIG welding; Sprays; Welding; 传输模式; 同步采集系统; 焊接工艺; 熔滴过渡; 电弧等离子; 离子对; 铝合金; droplet transition; aluminum alloy; plasma MIG welding; high speed photography
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(10)60634-6

The synchronous acquisition system of droplet image inspection and arc electric signals were established and the droplet transition characteristics of aluminum alloys were researched in the plasma-MIG welding process.Typical droplet transition modes include globular transfer mode,short circuiting transfer mode,metastable spray transfer mode and projected transfer mode.The result indicates that MIG droplet transfer frequency and droplet transfer modes are changed by introducing the plasma arc in the plasma-MIG welding process compared with the MIG welding on the aluminum alloys,which broadens the range of welding parameters when the stable welding process proceeds.The metastable spray transfer and projected transfer mode are proved to be the most optimal modes by comparing the stability of electronic signal,droplet transition,weld appearance and weld penetration.