Numerical Modelling of Microsegregation in Nodular Graphite Cast Iron

摘要

Microsegregation influences microstructure and mechanical properties of nodular graphite cast iron. A numerical non-steady state micro solute redistribution model has been developed for nodular iron. This model takes into account solute diffusion in both solid and liquid phases, the effect of interface movement and total solute conservation in the micro volume sphere. An effective partition coefficient is used in the model. Numerical calculations show a reasonable agreement with experimental results.