Study On the Recrystallization Behavior of Nb-microalloyed Steel during Hot Strip Rolling

摘要

The microstructural evolution of Nb-microalloyed steel during hot strip rolling are studied to be a prepare for the microstructure-properties model developed for practical purpose. The mean flow stress behavior as a function of inverse stand absolute temperature is investigated. The results are compared with the evolution of grain size and fractional softening predicted by present model. Good agreement between two results is obtained. Also the interaction between precipitation and recrystallization during finishing rolling are considered. It is showed that the dynamic recrystallization followed by metadynamic recrystallization can occur as a consequence of strain accumulation.