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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Thermodynamics and Kinetics of Alloys IV
Presentation Title Thermodynamic analysis of Fe-Cr-Mn alloys prepared by molten salt electro-deoxidation process
Author(s) Yang Xiao, Hui Li, Chang Liu
On-Site Speaker (Planned) Yang Xiao
Abstract Scope The Fe-Cr-Mn alloys is widely used in metallurgy, aerospace and other fields due to its high strength and excellent corrosion resistance. In this study, Fe2O3,Cr2O3 and MnO2 were used as raw materials to conduct thermodynamic analysis on the preparation of Fe-Cr-Mn alloys by molten salt electro-deoxidation process within the temperature range of 700 ℃ to 1000 ℃. The results show that under the experimental condition of 800 ℃, 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 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 reduction of the chromium component occurs (Cr2O3/CaCr2O4→Cr), and finally the reduction of the manganese component (MnO→Mn), eventually forming the Fe-Cr-Mn alloys.
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