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Effect of Magnesium and Calcium on the Activity of Oxygen in Model Nickel Melts at PAr = 0.1 MPa and Analysis of Nonmetallic Inclusions

  • THEORY OF METALLURGICAL PROCESSES
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Russian Metallurgy (Metally) Aims and scope

Abstract

Electromotive force measurements are used to study the activity of oxygen in nickel melts during their deoxidation with Mg/Ca (up to 0.2 wt %) in a high-purity argon atmosphere, and the changes in a[O] in accordance with the deoxidizer concentrations are described by logarithmic dependences. A substantial increase in the deoxidizing capacity of Mg and Ca as compared to that of Al is demonstrated for a deoxidizer concentration of 0.05 wt % in a metal. The morphology and composition of nonmetallic inclusions in the metal after deoxidation are studied; complex configurations of nonmetallic inclusions 2–100 μm in size, which are arranged at grain boundaries, are demonstrated.

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Notes

  1. Hereafter, the concentrations are given in wt %.

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Funding

This study was supported by the Russian Foundation for Basic Research, project no. 19-08-00461a.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119334, Moscow, Russia

    V. T. Burtsev & S. N. Anuchkin

  2. All-Russian Research Institute of Aviation Materials (VIAM), 105005, Moscow, Russia

    E. B. Chabina

Authors
  1. V. T. Burtsev
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  2. E. B. Chabina
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  3. S. N. Anuchkin
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Correspondence to V. T. Burtsev or S. N. Anuchkin.

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Translated by N. Kolchugina

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Burtsev, V.T., Chabina, E.B. & Anuchkin, S.N. Effect of Magnesium and Calcium on the Activity of Oxygen in Model Nickel Melts at PAr = 0.1 MPa and Analysis of Nonmetallic Inclusions. Russ. Metall. 2021, 1556–1563 (2021). https://doi.org/10.1134/S0036029521120077

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