Recrystallisation Driving and Pinning Forces during Hot Rolling of a Low Nb-Microalloyed Steel

摘要

The values of recrystallisation driving (F_R) and pinning forces (F_P) during the hot rolling of a low Nb-microalloyed steel were calculated using several expressions found in the literature. A comparative study of the hypothesis into the interaction between precipitates and migrating grain boundaries was carried out, and the methods for estimating volume fractions of precipitates and dislocation density were assessed. Though the criterion selected greatly influences the values obtained for both forces, F_P grows faster than F_R as the rolling temperature drops.