Enthalpies of mixing in Fe–C–Si melts

Abstract

The enthalpy of mixing of molten Fe–C–Si alloys is a significant element in performing mass balances on iron production and steelmaking, but almost no experimental data has been reported on enthalpy determination in these melts. As a result, models expressing this property as a function of composition must be derived from measurements of component activity, which are more widely available. The use of three such models – the regular solution model, Wagner’s model for dilute solutions, and the unified interaction parameter model developed by Bale and Pelton – have been used to calculate enthalpies of mixing in Fe–C–Si melts. The results are compared with each other and with the experimental data of Vitusevich et al.