Influence of initial microstructure and grain size on transformation of bainite to austenite in large size forgings

Effect of Cold-rolling and Heating Rate on Austenite Formation in a Low–Carbon Steel

“…This is mainly due to the variety of microstructures and morphologies with which the austenite formation process can occur. [11][12][13] In cold-rolled low-carbon steels, austenite formation involves recrystallization of the cold-rolled microstructure, which modifies the evolution of austenite as a function of heating rate. [14][15][16] Liu et al 14) reported that when the heating rate is low (~0.5 K s − 1 ), recrystallization is completed before reaching the austenite formation start temperature (Ac 1s ).…”