Arc behaviour and weld formation in gas focusing plasma arc welding |
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| Authors: | Tian Qing Li Xi Mou Yang Lu Chen Yu Zhang Yu Cheng Lei Jiu Chun Yan |
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| Affiliation: | 1. School of Materials Science &2. Engineering, Jiangsu University, Zhenjiang, People’s Republic of Chinalitq@ujs.edu.cn;4. Engineering, Jiangsu University, Zhenjiang, People’s Republic of China;5. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, People’s Republic of China |
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| Abstract: | ABSTRACTImproving penetrability is a key issue in plasma arc welding (PAW). Increasing plasma energy is one way to improve arc penetrability. Gas focusing plasma arc welding (GF-PAW) platform is self-designed and developed. Role and action mechanism of focusing gas is initially studied. Focusing gas makes no obvious effects on arc pressure distribution and value. Focusing gas changes arc temperature distribution outer orifice, while focusing gas does not affect arc temperature distribution inner orifice. Focusing gas can constrict arc and arc energy increases 210?W with an increase in arc voltage of 1.4?V. GF-PAW can fully penetrate the whole work-piece while PAW can only partially penetrate the work-piece under welding current 150?A. GF-PAW can improve penetrability, and may increase welding speed, and has a potential application in manufacturing. |
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| Keywords: | Plasma arc welding arc behaviour focusing gas penetrability weld formation |
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