Rolling Conditions for High R–Value of Hot Rolled Steel Sheets Analyzed by Computer Simulations Model for Micro–Structure

Abstract

Hot rolled steel sheets with high r–value were developed. The steel was rolled with more than 50% reduction at each final three stands near the A r₃ temperature. The condition was investigated by a computer simulation model for micro–structures and a transformation texture model. Dynamically recrystallized γ with random texture transforms to α with random texture or that with {110}<001> orientation. Average r–value reaches 1.0 or more with random orientation. On the other hand, more than 1.2 of average r–value was maintained when the {110}<001> α was hot rolled giving recrystallized {112}~{111}<011> α texture.