The Paton Welding Journal, 2018, №02

 

2018 №02 (08)

DOI of Article 10.15407/tpwj2018.02.01

2018 №02 (02)

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TPWJ, 2018, #2, 2-6 pages
 
Calculation model of formation of nonmetallic inclusions of multilayer morphology in weld metal

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #2, 2018 (March)
Pages                      2-6
 
 
Authors
L.A. Taraborkin and V.V. Golovko
E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
The objective of the work was development of a calculation model for practical prediction of the kinetics of formation of multicomponent endogenous nonmetallic inclusions in the weld metal. The proposed mathematical model is a nonstandard nonlinear boundary problem for a system of diffusion equations with the specific condition on the moving melt-inclusion interphase, and it allows for the kinetics and heterogeneity of the process under the conditions of the real thermal cycle of welding. The calculation program developed as a computer realization of the constructed model allows evaluating in a computer experiment the size and composition of endogenous nonmetallic oxide inclusions, depending on concentration and thermal conditions in the weld pool. 10 Ref., 2 Figures.

Keywords: arc welding, weld pool, nonmetallic inclusions, mathematical model, prediction
 
Received:                18.12.17
Published:               15.03.18
 
 
References

1. Gubenko, S.I., Parusov, V.V., Derevyanchenko, I.V. (2005) Nonmetallic inclusions in steel. Dnepr, ART-PRESS [in Russian].
2. Ozhigov, L.S., Mitrofanov, A.S., Rybalchenko, N.D. et al. (2017) Influence of nonmetallic inclusions in low-alloy carbon steel on service life of NPP piping. Voprosy Atomnoj Nauki i Tekhniki, 110 (4), 59–64 [in Russian].
3. Myasnikova, A.A. (2012) Nonmetallic inclusions and their influence on welded joint quality in manual arc welding. Master’s J., 1, 50–54.
4. Hong, T., Debroy, T., Babu, S.S., David, S.A. (2000) Modeling of inclusion growth and dissolution in the weld pool. and Mater. Transact. B, 31B, 1, 161–169.
5. Kwon Yu-Jong, Zhang Jian, Lee Hae-Geon (2008) A CFD-based nucleation-growth-removal model for inclusion behavior in a gas-agitated ladle during molten steel deoxidation. ISIJ Int., 48(7), 891–900. https://doi.org/10.2355/isijinternational.48.891
6. Golovko, V.V., Taraborkin, L.A. (2016) Modelling of chemical composition of weld pool metal in arc methods of welding. The Paton Welding J., 1, 12–16. https://doi.org/10.15407/tpwj2016.01.02
7. Hong, T., Debroy, T. (2001) Time-temperature-transformation diagrams for the growth and dissolution of inclusions in liquid steels. Scripta Materialia, 44(5), 847–852. https://doi.org/10.1016/S1359-6462(00)00675-8
8. Grigoryan, V.A., Stomakhin, A.Ya.. Ponomarenko, A.G. et al. (1989) Physical-chemical calculations of electric steelmaking processes. Moscow, Metallurgiya [in Russian].
9. Pokhodnya, I.K., Demchenko, V.F., Demchenko, L.I. (1979) Mathematical modeling of gas behavior in welds. Kiev, Naukova Dumka [in Russian].
10. DSTU ISO 6847:2015 (ISO 6847:2013, IDT): Welding consumables. Deposition of a weld metal pad for chemical analysis [in Ukrainian].