Hot Deformation Behavior and Processing Map of 23Cr-8Ni Steel

Abstract:

Using a Gleeble 3500 thermomechanical simulation testing machine, the hot deformation characteristics of 23Cr-8Ni steel were investigated under the conditions of 1000–1250 °C and 0.001?10 s^-1. Furthermore, the microstructure of the characterization region was analyzed to investigate the recrystallization behavior of 23Cr-8Ni steel. Results show that as the strain rate decreases and the deformation temperature increases, the flow stress decreases. Because the softening phenomenon occurs after the peak stress, the flow stress decreases. The stress index (n) is 4.28, and the thermal deformation activation energy (Q) is 588 878 J/mol. Processing map is established, and an optimal thermal processing range of 0.001–0.1 s^-1 and 1000–1200 °C is achieved, therefore greatly promoting the yield rate.