The Paton Welding Journal, 2019, №06



2019 №06 (03)

DOI of Article 10.15407/tpwj2019.06.04

2019 №06 (05)

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The Paton Welding Journal, 2019, #6, 25-28 pages

Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #6, 2019 (June)
Pages 25-28

Influence of refractory dispersed phases on physical-chemical properties of slag metls of MgO–Al₂O₃–SiO₂–CaF₂ system

I.O. Goncharov¹, V.S. Sudavtsova¹, D.D. Mishchenko¹, A.M. Duchenko¹ and V.E. Sokolsky²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Taras Shevchenko National University of Kyiv 60 Volodymyrska Str., 01601, Kyiv, Ukraine

The article is devoted to the study of basic mechanisms of control of structure and physical-chemical properties of slag oxide-fluoride melts to develop fluxes with predicted chemical, metallurgical and technological parameters for welding high-strength low-alloyed steels. The addition of MgO into the slag melts of the MgO–Al₂O₃–SiO₂–CaF₂ system provides an abnormal decrease in the thermodynamic activity of silicon oxide in them due to the formation of a refractory dispersed phase MgO·Al₂O₃ in the melt. On the basis of methods of national standard and gravimetric one the procedures for determination of quantitative content of MgO·Al₂O₃ in liquid and solid slags of the MgO–Al₂O₃–SiO₂–CaF_2, system were proposed. Its optimum content in a slag melt was determined, in which the combination of optimal chemical, metallurgical and technological properties of flux during electric arc welding is provided. 12 Ref., 1 Table, 5 Figures.
Keywords: fluxes for electric arc welding, slag melts, refractory dispersed particles, toughness, electric conductivity, thermodynamic activity


Received: 15.04.19
Published: 20.06.19

References

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11. Goncharov, I.A., Sokolsky, V.E., Davidenko, A.O. et al. (2012) Formation of spinel in melt of the MgO-Al2O3-SiO2-CaF2 system agglomerated welding flux and its effect on viscosity of slag. The Paton Welding J., 12, 18-25.
12. Goncharov, I.A., Galinich, V.I., Mishchenko, D.D. et al. (2013) Methods of control of silicon oxide activity in slag melts. Ibid., 2, 8-12.

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Suggested Citation

I.O. Goncharov, V.S. Sudavtsova, D.D. Mishchenko, A.M. Duchenko and V.E. Sokolsky (2019) Influence of refractory dispersed phases on physical-chemical properties of slag metls of MgO–Al₂O₃–SiO₂–CaF₂ system. The Paton Welding J., 06, 25-28.

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