1992 Volume 78 Issue 4 Pages 632-639
Effects of rolling temperature and inter-pass annealing on the microstructures of hot rolled and annealed strips and the ridging property of cold rolled and annealed sheet have been investigated of continuously cast slab of Nb added 17% Cr stainless steel which had a near {100}//N. D orientation.
In such a case of no inter-pass annealing where no recrystallization during hot rolling occures, decrease in the rolling temperature increases deformation bands, and these banding makes recrystallized structures of hot rolled strip fine. When recrystallization occures by inter-pass annealing, microstructures of hot rolled strip become finer and uniform recrystallization occures after hot strip annealing.
The ridging property of cold rolled and annealed sheet corresponds to the condition of recrystallization of hot rolled and annealed strip. When coarse unrecrystallized domaines remain in the center layer of annealed hot strip, it causes severe ridging in final annealed sheet. These results suggest that the unrecrystallized center layer of hot rolled and annealed strip retains strong {100} //N. D orientation and thereby deteriorates ridging properties of final annealed sheet. The suggestion is supported by another experiment of one pass hot rolling.
