摘要：Mathematical model of solute [C] distribution in twin-roll strip casting process has been setup successfully with Calco.oft for the first time. Simulation result shows that in the center of the molten steel pool between the two rolls there is a vortex flow, which is a solute enriched area. But the highest solute co.centration position is at the solidification front of the co.umnar grain zone near the co.ling roll surface. Another solute enriched position is in the back flow above the nip point. co.bined with the formation mechanism of microstruoture in final as cast strip, analysis shows that solute enriched area is in the transitional area between co.umnar and equiaxed grain zone.