Simulation of the Evolution of Carbonitride Particles of Complex Composition upon Hot Deformation of a Low-Alloyed Steel

Resumo

A model has been proposed for describing the evolution of several ensembles of carbonitride particles with complex compositions in low-alloyed steel upon hot deformation in the temperature range of stable austenite. In the model the mutual influence of changes upon deformation in structural parameters such as dislocation density and average austenite-grain size (with allowance for relaxation processes and precipitation processes) and the evolution of carbonitride phases have been considered. Likewise, the model takes into account the polydispersity of ensembles of precipitates. The results of calculations have been compared with the experimental data obtained in steel microalloyed with vanadium, niobium, and titanium