Effect of Inter-pass Time in Rough Rolling Process on the Orientation Distribution in 17%Cr Stainless Steel Sheet

Abstract

Orientation distribution in the 17%Cr stainless steel rough rolled with inter-pass time of 10s (specimen A) and 30s (specimen B) respectively were investigated utilizing SEM-ECP (selected area electron channeling pattern).
Large colonies, groups of grains with the same orientation, of {100} <011>orientation are found in the specimen A after rough rolling. It is proposed to be formed by the poor static recrystallization during rough rolling due to the short inter-pass time and the suppression effect of static recrystallization caused by the α-γ transformations immediately after the final pass of the rough rolling.
Large ridging is observed in the cold rolled and annealed specimen A.
The cause of the large ridging is considered to be due to the large colonies of {100} <011> orientation inherited from the rough rolled stage and scattered asymmetrically along the central line of the specimen thickness.