Modelling of Microstructure Evolution during Recrystallization Controlled Rolling

Abstract

The static recrystallization characteristics (grain size, kinetics) have been established for Ti-V-(Nb) austenites and used as the basis for a theoretical evaluation of microstructurai evolution during hot rolling of plate, In this context, particular attention has beenfocussed on so-called recrystallization controlled rolling, wherebya fine as-rolled ferrite garin size is obtained via transformation from an austenite which has been substantially grain refined via static recrystallization. The model is shownto forecast a behaviour which is in acceptable accord with practical plate-rolling experience. Furthermore, the rolling model has been used in a systematic theoretical investigation of the effect of principal rolling variables on the degree of microstructural refinement during processing of Ti-V-(Nb) steels via recrystal]ization controlled rolling. © 1992, The Iron and Steel Institute of Japan. All rights reserved.