The Paton Welding Journal, 2006, №07

2006 №07 (01)

2006 №07 (03)

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The Paton Welding Journal, 2006, #7, 11-15 pages

Numerical modelling of absorption of gases by deposited metal in wet underwater welding

O.M. Portnov, S.Yu. Maksimov

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Results of mathematical modelling of composition of atmosphere of a vapour-gas bubble and content of hydrogen and oxygen in the weld metal as a function of slag in wet underwater welding are given. The mathematical model is based on calculation of thermodynamic equilibrium in an isolated three-phase gas-slag-metal system. It is shown that atmosphere of the vapour-gas channel in a temperature range of 2000-2500 К consists of a water vapour and molecular hydrogen.
Keywords: underwater arc welding, vapour-gas bubble, isobaric-isothermal potential, gas-slag-metal system, hydrogen, oxygen, water vapour, basicity of slag

References

1. Avilov, T.I. (1958) Study of the underwater arc welding process. Svarochn. Proizvodstvo, 5, 12–14.
2. Madatov, N.M. (1965) Properties of vapour-gas bubble around arc in underwater welding. Avtomatich. Svarka, 12, 25–29.
3. Ando, S., Asahina, T. (1983) A study on the metallurgical properties of steel welds with underwater gravity welding. In: Proc, of Int. Conf, on Underwater Welding Process (Trondheim, June 27-28, 1983). Oxford, 255–261.
4. Sinyarev, G.B., Vatolin, N.A., Trusov, B.G. et al. (1982) Application of computer for thermodynamic calculations of metallurgical processes. Moscow: Nauka.
5. Pokhodnya, I.K., Tsybulko, 1.1., Orlov, L.N. (1993) Influence of slag composition on hydrogen content of molten metal in CO2 welding. Avtomatich. Svarka, 11, 3–5.
6. Pokhodnya, I.K. (1972) Gases in welds. Moscow: Mashinostroenie.
7. Morozov, A.N. (1968) Hydrogen and nitrogen in steel. Moscow: Mashinostroenie.
8. Linchevsky, B.V. (1986) Thermodynamics and kinetics of interaction between gases and liquid metals. Moscow: Me- tallurgiya.
9. Pokhodnya, I.K., Shvachko, V.I., Portnov, O.M. (2000) Mathematical modelling of absorption of gases by metal du¬ring welding. The Paton Welding J., 7, 11–16.
10. Kononenko, V.Ya. (1996) Metallurgical peculiarities of flux-cored wire welding in water environment. Avtomatich. Svarka, 9, 22–26.
11. Surian, E. (1997) ANSI/AWS E7024 SMAW electrodes: the effect of coating magnesium additions. Welding J., 76(10), 404–411.
12. Rissone, N., Bott, I., Jorge, J. et al. (1997) ANSI/AWS A5.1-91 E6013 rutile electrodes: the effect of Wollastonite. Ibid., 11, 498–507.

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Suggested Citation

O.M. Portnov, S.Yu. Maksimov (2006) Numerical modelling of absorption of gases by deposited metal in wet underwater welding. The Paton Welding J., 07, 11-15.

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