Abstract
The solubilities of Ti balanced with titanium carbide and titanium carbonitride in Fe-Csat-Ti melts were predicted by molecular interaction volume model (MIVM). In order to verify the present method, the activity of Si, Mn and Ti in Fe-C-Si, Fe-C-Mn and Fe-C-Ti melts were predicted by MIVM and compared with experimental data. The results indicate that the predicted values of Si, Mn and Ti activity by MIVM are in good agreement with the experimental data, and the predictive effect of this model is better than the Wagner formalism. Considering the fact that titanium carbonitride is a non-ideal solid solution, the solubilities of Ti were predicted. The results are in reasonable agreement with the experimental data, and the prediction effect of MIVM are of better stability and reliability. Therefore, its prediction results can be used as the reliable basis of thermodynamic study for liquid iron containing Ti, and the calculations can be performed to predict at which conditions the carbides or carbonitrides will form.
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