The Importance of Hot Rolling Microstructural Evolution Obtained by Hot Torsion Tests With Mathematical Modeling

摘要

The recovery and recrystallization processes of steels can be described by thermomechanical parameters which depend of intrinsic characteristics. These parameters are present in microstructural mathematical models proposed in other works and they describe the kinetics of static, dynamic and metadynamic recrystallization. The first mathematical models were applied to C-Mn steels and later improvements were developed for other steel grades [1; 2, 3, 4]. These mathematical models are able to predict the material mean flow stress (MFS), the static and dynamic recrystallization/recovery fraction, the austenitic grain size between strains, as well as other features.