Abstract: A previous continuum model and corresponding numerical solution method are extended to a multi-component solidification system. Using the relevant simulation computer codes, the heat, mass and momentum transfer phenomena and macrosegregation formations in a directional solidification process of large plain carbon steel ingot are successfully and efficiently simulated on a personal computer. The computation results indicate that through the directional solidification technique, high quality solidified steel ingots with less impurity solute contents and less macrosegregation in their majority portions of the ingot volume can be obtained.

Key words: Continuum model, Macrosegregation, Numerical simulation, Steel ingot solidification