Prediction of component activities of quaternary systems using the sub-regular solution model

A sub-regular solution model used to predict the component activities in a homogeneous region of a quaternary system was developed in Shanghai Enhanced Lab of Ferrometallurgy. It was designated as SELF-SReM4. The previous paper elucidated the model and the evaluating procedures of Ajkl parameters(1). In this paper, SELF-SReM4 is used to predict the component activities for the systems of C-Mn-Fe-Si, C-Cr-Fe-Ni, C-Cr-Fe-P and MnO-SiO2-Al2O3-CaO.