9th ECCC European Continuous Casting Conference – ECCC 2017

High clean steels have been widely employed as automotive parts. However, the spinel inclusion, which is formed during the ladle refining process, has potential causes of nozzle clogging as well as of defects in products. Furthermore, the liquid oxide inclusion in the steel melt can be transformed to spinel during casting process. Hence, it is crucial to predict the inclusion evolution during the ladle refining and continuous casting processes. Thus, we recently developed the macro simulation module for the refractory-slag-metal-inclusion multiphase reaction, called 'ReSMI' reaction model by integrating the refractory-slag, slag-metal and metal-inclusion elementary reactions in order to predict the evolution of inclusions during the secondary refining process. Furthermore, the simulation model for prediction of inclusion transformation during the solidification of steel was developed by linking the Ohnaka model into the FactSage macro simulation. Ohnaka model was used for microsegregation calculation and the FactSage was used for calculation of chemical reaction, phase transformation and inclusion formation behaviour. From this combinatorial simulation, we can predict the inclusion evolution procedure during refining and casting processes.