Segregation and Microstructure in Solidifying Steel

Brian Thomas and Young Mok Won

Continuous Casting Consortium


A simple analytical model of microsegregation in solidifying steel has been developed based on the Clyne-Kurz model, and includes the effects of multiple alloying elements, columnar dendrites, coarsening and the peritectic transformation. A new empirical equation for secondary dendrite arm spacing has been developed, which varies with cooling rate and carbon content. Predictions with this microsegregation model agree with both experimental measurements and calculations with a 1-D finite difference model. The model has been implemented into CON1D, to investigate the effects of continuous casting conditions on microstructure and composition, in addition to temperature and stress.

Publications:

Won, Young-Mok and B.G. Thomas, “Simple Microsegregation Model for Steel Solidification”, Metallurgical and Materials Transactions A, 2001, Vol. 32A, No. 7, (July) pp. 1755-1767. Click here for a PDF version. (449 KB)