Modeling of Static Recrystallization Kinetics of Nb-Bearing Steels

摘要

By using isothermal double hit compression tests and applying the 2 percent offset method, a new-model was developed to predict the micro structural evolution of Nb-bearing steels at temperatures above and below the start temperature of strain-induced precipitation (T_p). The T_p was developed as a function of true strain, initial austenite grain sue and the Nb content. The activation energy of static recrystallization (Q_(rex)) was expressed as a function of the content of different alloy elements. It was found that Nb played the most important role in increasing the value of Q_(rex). The microstructural observations and measurements confirmed the validity of the model developed in the present investigation,