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The dynamic recrystallization (DRX) behavior and microstructure evolution of the as-extruded GH4710 alloy were investigated through isothermal compression experiments and quantitative metallographic analysis. The study was conducted at temperatures ranging from 1050 to 1120 °C and strain rates ranging from 0.01 to 5 s_^-1. True stress-strain curves, average grain size, and DRX volume fraction data were obtained under various deformation conditions. Model for the DRX volume fraction and grain size of the as-extruded GH4710 alloy have been established using a statistical regression method. The developed model was implemented in the Derform-3D software, and isothermal compression simulations were conducted using the finite element method (FEM). The simulation results of the isothermal compression experiments have verified the accuracy of the model. Subsequently, a simulation of a turbine disk forging was conducted using the model to determine the optimal process parameters by analyzing the results of the simulation. The comparison revealed a strong correlation between the simulated results and the actual microstructure of the turbine disk forged with the optimal process parameters. Therefore, the established DRX model serves as a fundamental reference for understanding the microstructure evolution during the as-extruded GH4710 alloy hot-deformation process.