Effect of Arc Length on Weld Appearance and Metal Transfer in Twin-Wire GMAW Process

Abstract:

The experiments were performed with the twin-wire GMAW machine of Fronius product. The metal transfer process and the arc shapes were observed by use of shadowgraph technique with a high-speed camera. When the arc length increases during twin-wire CO₂ arc welding, the mode of metal transfer changes from short-circuiting transfer to globular transfer, and to spray transfer. But it is difficult to form a stable spray transfer process, and the weld appearance becomes worse. The short-circuiting transfer in twin-wire CO₂ arc welding can improve the process stability.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 1279-1282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.1279
• Online since: February 2012
• Authors: Huan Ming Chen, Shao Jie Wu
• Keywords: Carbon Dioxide Arc Welding, Metal Transfer, Twin-Wire Welding, Weld Appearance

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