Abstract

Based on a microsegregation model of solute elements in mushy zone and a two dimensional transient thermo-mechanical coupled finite element model for describing the growth of solidifying shell in slab continuous casting mold, the solute microsegregation behavior at dendrite boundary and the thermo-mechanical behaviors of solidifying shell, including the dynamic formation of air gap and the distribution of mold flux film between shell and mold, were analyzed during continuous casting of peritectic steel. A CSC (Cracking Susceptibility Coefficient) analytical model to represent quantitatively the cracking possibility of solidifying shell in mold was proposed, and the variation of shell cracking susceptibility in slab mold during a typical peritectic steel continuous casting process was investigated by analyzing the shell CSC distribution.

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