Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Special Issue on: Temperature Production of Clean Alloyed Steel
Thermodynamics of Solid and Liquid MnS-CrS-FeS Phase in Equilibrium with Molten Fe-Cr-Mn-S Alloy
Yan Lu, Takahiro Miki
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Keywords: sulfide inclusion, activity, thermodynamics, phase equilibrium, regular solution model
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2022 Volume 108 Issue 8 Pages 541-551

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Abstract

Thermodynamic property of solid MnS-CrS-FeS system was determined based on the combination between thermodynamic properties of liquid MnS-FeS, CrS-FeS, and MnS-CrS-FeS phase determined by the authors and reported phase diagram of MnS-FeS, CrS-FeS and MnS-CrS system. The determined parameters were verified by comparison with experimental results of equilibrium relationship between metal/sulfide in Fe-Cr-Mn-S system at 1793K. By utilizing the determined parameters, phase equilibria involving sulfide phase in liquid Fe-Cr-Mn-S system was established. According to the phase equilibria information controllability of MnS-CrS-FeS sulfide phase in typical stainless steel during solidification was evaluated.

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