Heat transfer analysis for solidifying ferrous multi-component alloys using computational thermodynamics

Abstract

Temperature-enthalpy curves of ferrous multi-component commercial alloys of S45C steel, SUS304 stainless steel and FC200 cast iron were calculated based on the thermodynamic calculation using the ThermoCalc for both an equilibrium state and non-equilibrium state with no diffusion in solid. The heat transfer simulations during the solidification of the alloys based on the enthalpy method were carried out using the calculated temperature-enthalpy curves. Thermal analysis experiment of the alloys under a furnace cooling condition was carried out and measured cooling curves were compared with simulated ones. The simulated cooling curves of S45C carbon steel and SUS304 stainless steel obtained with the non-equilibrium condition showed similar shapes to the experimentally measured ones. Phase transformation kinetics during the eutectic solidification of FC200 cast iron was taken into account for calculating the temperature-enthalpy curve of FC200 cast iron and simulated cooling curve showed similar shape to measured cooling curve. © 2009 ISIJ.