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 1 373 to 1 473 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. © 2012 ISIJ.