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Russian Metallurgy (Metally)

, Volume 2019, Issue 5, pp 531–535 | Cite as

Thermodynamics of the Oxygen Solutions in Titanium-Containing Fe–Co–Cr Melts

  • A. A. AleksandrovEmail author
  • V. Ya. DashevskiiEmail author
Article
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Abstract

A thermodynamic analysis of the influence of titanium on the oxygen solubility in Fe–Co–Cr melts at 1873 K is performed. The dependences of the oxygen solubility in Fe–Co–Cr melts on the titanium content are calculated. The titanium content at which the deoxidation reaction mechanism is changed (Cr2O3 \( \rightleftarrows \) Ti3O5) is as follows: 2.602 × 10–3% Ti for the Fe–10% Co–10% Cr alloy and 2.975 × 10–3% Ti for the Fe–20% Co–25% Cr alloy. A low titanium content insignificantly increases the oxygen concentration determined by the chromium content. At a higher titanium content (after the change of the mechanism of interaction of chromium and titanium with oxygen, when titanium determines the oxygen solubility in the melts), the oxygen concentration substantially decreases and, then, increases after passing a minimum point at a titanium content of ~0.9%. The minimum oxygen concentrations of these alloys are 1.8 × 10–3 and 3.9 × 10–3%, respectively.

Keywords:

Fe–Co–Cr system titanium melts oxygen solubility 

Notes

FUNDING

This work was performed in terms of a state assignment no. 007-00129-18-00.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Baikov Institute of Metallurgy and Materials Science, Russian Academy of SciencesMoscowRussia

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