Abstract <p>This study investigates the hot compression behavior of as-cast 00Cr25Ni7Mo4N material employing Gleeble-3800 for simulating material heat treatment. Tests were conducted at temperatures ranging from 1000 to 1200°C and strain rates of 0.001 to 1 s^–1. The results reveal that dynamic recrystallization occurs at temperatures between 1000 and 1050°C and strain rates from 0.1 to 1 s^–1, with microstructural changes becoming more pronounced at higher temperatures. As the temperature increases, flow stress decreases, and dynamic recrystallization becomes more evident, particularly beyond 1100°C. At 1000°C and 1 s^–1, flow stress is higher due to increased dislocation slip. The study also highlights the role of dynamic recrystallization in grain refinement, improving plasticity. To model the deformation behavior, an Arrhenius-type hyperbolic sine constitutive equation was developed, along with a dynamic recrystallization percentage (DRX) model. Electron backscatter diffraction (EBSD) was used to analyze grain boundaries and dislocation features, providing insights into grain size distribution and orientation. These findings offer valuable theoretical support for optimizing the hot working process and improving the material’s performance in industrial applications.</p>