Study of static recrystallization behavior of austenite in a Ti–V microalloyed steel

Abstract

The static recrystallization (SRX) behavior in Ti–V microalloyed steel was studied through two-pass compression tests using a Gleeble-3500 thermo-mechanical simulator. Under the experimental conditions with the deformation temperatures of 950–1050 °C, strain rates of 0.01–1 s–1, pass strains of 0.1–0.2 and inter-pass time of 1–100 s, respectively. The influence of various processing parameters on the static softening were discussed seriously and the results showed that the softening fractions raise quickly with the deformation temperature, the strain rate, the pass strain and the inter-pass time; Oppositely, it is reduced as the initial austenite grain size raises. In addition, the kinetic equations have been adopted and the required parameters have been determined based on the experiments, the calculated results are consistent with the experimental results, indicating the SRX behavior and microstructural evolutions of Ti–V microalloyed steel could be estimated by the determined kinetics parameters.