Dissolution Behavior of δ-ferrite in Continuously Cast Slabs of SUS304 during Heat Treatment

Abstract

The dissolution of δ-ferrite in continuously cast slabs of SUS304 has been studied during heat treatment in the temperature range of 1373 to 1473 K. The dissolution behavior can be expressed by Kolmogorov–Johnson–Mehl–Avrami equation. The dissolution rate is affected by annealing temperature and secondary dendrite arm spacing. Moreover, the numerical methodology for multi-phase field method has been performed in Fe–Cr–Ni alloy. It is thought that dissolution behavior of δ-ferrite during heat treatment can be also predicted by this method.