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The Fe–Cr–Mn alloy is widely used in metallurgyMetallurgy, aerospace, and other fields due to its high strengthStrength and excellent corrosionCorrosion resistance. In this study, Fe2O3, Cr2O3, and MnO2 were used as raw materials to conduct thermodynamic analysisThermodynamic analysis on the preparation of Fe–Cr–Mn alloys by molten saltMolten salt electro-deoxidation processProcess within the temperatureTemperature range of 973–1273 K. The results show that under the experimental condition of 1073 K, MnO2 can spontaneously reduce to Mn2O3, and Mn2O3 is reduced step by step after the application of voltage (Mn2O3 → Mn3O4 → MnO). The O2− and Ca2+ dissolved in the molten saltMolten salt react with Fe2O3 and Cr2O3 at the cathode to form CaFe2O4 and CaCr2O4, among which the iron component is preferentially reduced (Fe2O3/CaFe2O4 → Fe3O4 → FeO → Fe). Subsequently, the reductionReduction of the chromium component occurs (Cr2O3/CaCr2O4 → Cr), and finally the reductionReduction of the manganese component (MnO → Mn), eventually forming the Fe–Cr–Mn alloys.

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Thermodynamic Analysis of Fe–Cr–Mn Alloys Prepared by Molten Salt Electro-Deoxidation Process

  • 会议论文

  • 发表日期：

    2026年

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  • Yang Xiao,
  • Hui Li,
  • Chang Liu

摘要

The Fe–Cr–Mn alloy is widely used in metallurgyMetallurgy, aerospace, and other fields due to its high strengthStrength and excellent corrosionCorrosion resistance. In this study, Fe2O3, Cr2O3, and MnO2 were used as raw materials to conduct thermodynamic analysisThermodynamic analysis on the preparation of Fe–Cr–Mn alloys by molten saltMolten salt electro-deoxidation processProcess within the temperatureTemperature range of 973–1273 K. The results show that under the experimental condition of 1073 K, MnO2 can spontaneously reduce to Mn2O3, and Mn2O3 is reduced step by step after the application of voltage (Mn2O3 → Mn3O4 → MnO). The O2− and Ca2+ dissolved in the molten saltMolten salt react with Fe2O3 and Cr2O3 at the cathode to form CaFe2O4 and CaCr2O4, among which the iron component is preferentially reduced (Fe2O3/CaFe2O4 → Fe3O4 → FeO → Fe). Subsequently, the reductionReduction of the chromium component occurs (Cr2O3/CaCr2O4 → Cr), and finally the reductionReduction of the manganese component (MnO → Mn), eventually forming the Fe–Cr–Mn alloys.