Static Recrystallization Behavior Induced by Hot Deformation of Fe–22Cr–25Ni Austenitic Heat‐Resistant Steel

The static recrystallization (SRX) behavior of a novel Fe–22Cr–25Ni austenitic heat‐resistant steel is investigated through double hot compression tests. The deformation conditions include interpass holding time (1–200 s), temperature (950–1150 °C), strain rate (0.01–1 s −1 ), and prestrain (10%–22%). Results demonstrate that the SRX volume fraction increases with higher deformation temperature, strain rate, prestrain, and interpass time, but decreases with larger initial austenite grain size. Conversely, the recrystallized grain size increases with elevated temperature, extended interpass time, and coarser initial grains, while decreasing with higher strain rates and prestrain levels. Strain‐induced grain boundary migration is identified as the nucleation mechanism for SRX. Based on experimental data, a kinetics model for SRX is established, the calculated thermal activation energy for SRX is 324.08 kJ mol −1 . Validation shows excellent agreement between predicted and experimental results.