Recrystallization of low-carbon titanium stabilized steel

Abstract

The recrystallization kinetics and microstructure of a low-carbon titanium stabilized steel, cold rolled and annealed in the temperature interval between 800° and 1750°F, were investigated. Recrystallization followed the normal sigmoidal relationship at all temperatures; however, compared to low-carbon steel without the addition of titanium, recrystallization was severely retarded. The longer time required for recrystallization is believed to have occurred primarily as a result of the titanium in solution and to a lesser degree because of the presence of numerous stable precipitate particles. No precipitation occurred during recovery prior to recrystallization to alter the recrystallization kinetics as has been observed in aluminum killed steels. Annealing studies showed that the addition of titanium altered the recrystallization texture in a manner highly favorable for enhanced drawability (high$\bar R$ values) resulting from an increase in the intensity of the {111∼ component. Heating rate and annealing temperatures were found to exert only a small influence on the recrystallization texture. The influence of titanium on the recrystallization kinetics and grain morphology is discussed in terms of improved properties compared to rimmed and aluminum killed steel.