Structure Formation of the Nitrogen-Containing Austenitic 04Kh20N6G11M2AFB Steel at Hot Deformation: Part I. Influence of Deformation Temperature and Strain Rate on the Process of Dynamic Recrystallization

Abstract

This work determines the values of the deformation threshold necessary for the initiation and development of dynamic recrystallization within the investigated deformation temperature and strain rate for high-strength corrosion-resistant nitrogen-containing austenitic 04Kh20N6G11M2AFB steel. Analysis of diagrams shows that the deformation resistance increases with the decrease in the deformation temperature. A faint peak is observed at 1000–1200°C; it indicates the start of dynamic recrystallization. The structure of high-strength corrosion-resistant nitrogen-containing austenitic 04Kh20N6G11M2AFB steel after hot deformation with the strain rate of 0.1, 1.0, and 10 s^–1 within the temperature range of 900–1200°С is studied by the EBSD analysis and transmission electron microscopy.