Analysis of Controlled Driving and Spreading Behavior of Molten Pool in Cold Metal Transfer

An Zhang, Yanfeng Xing, Xiaobing Zhang, Fuyong Yang and Juyong Cao
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An Zhang: School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Yanfeng Xing: School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Xiaobing Zhang: School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Fuyong Yang: School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Juyong Cao: School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Energies, 2022, vol. 15, issue 4, 1-17

Abstract: The controlled short-circuit transfer is used to control the heat input of the molten pool and the base metal in the cold metal transfer welding process, including droplet formation, droplet transfer and molten pool flow. Based on the influence of arc pressure on the surface of the molten pool, droplet impact and residual energy on the flow behavior of the molten pool, this research proposes the arc pressure driving model, the droplet impact driving model and the residual energy transfer model on the molten pool surface respectively, and on this basis, a theoretical model of controlled driving and spreading of the cold metal transition bath is proposed. The theoretical relationship between the surface shape of the keyhole and the driving force, and the relationship between the surface shape of the molten pool and the welding current are established. The model accurately predicts the formation width and contact angle of the molten pool in a specific interval, which can better control the welding process and geometry.

Keywords: controlled short-circuit transfer; arc pressure; droplet impact; residual energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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