The Paton Welding Journal, 2008, №10

2008 №10 (02)

2008 №10 (04)

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The Paton Welding Journal, 2008, #10, 16-22 pages

Modelling of the processes of evaporation of metal and gas dynamics of metal vapour inside a keyhole in laser welding

V. Krivtsun¹, S.B. Sukhorukov¹, V.N. Sidorets¹, O.B. Kovalev²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²S.A. Khristianovich Institute of Theoretical and Applied Mechanics, RAS Siberian Division, Novosibirsk, Russia

Abstract
Self-consistent mathematical models are suggested to describe processes of metal evaporation, surface condensation and gas dynamics of metal vapour inside a keyhole formed in molten metal in deep-penetration laser welding. Numerical analysis of thermal and gas-dynamic characteristics of the flow of vapour inside the keyhole in Iaser weldilng of sleel lies been conducted. The effect of the gas-dynamic processes on the state of vapour in the keyhole, its pressure on the keyhole wall and heat exchange in the molten pool induced by the processes of evaporation and condensation on its free surface has been studied.
Keywords: laser welding, keyhole, evaporation, surface condensation, gas dynamics, metal vapour, mathematical model.

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Suggested Citation

I.V. Krivtsun, S.B. Sukhorukov, V.N. Sydorets, O.B. Kovalev (2008) Modelling of the processes of evaporation of metal and gas dynamics of metal vapour inside a keyhole in laser welding. The Paton Welding J., 10, 16-22.

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