Simulation of Conditions for Finish Rolling of Microalloy Steels.

A new steel rolling method is proposed which takes into account the fact that during the rolling process at a constant rate with a drop of the Zener-Hollomon parameter Z takes place; this is replaced by a newly defined Z prime parameter which is the function of the torsion temperature and rate. The description of the stress/strain curves utilizes this parameter. This makes the complicated computation of the activation energy which is required for evaluating the Z value unnecessary. The method was experimentally verified under conditions of finish rolling of a C-Mn-Nb-V-based microalloy steel.