State Key Laboratory of Materials Processing and Die&Mould Technology;
School of Materials Science and Engineering;
Huazhong University of Science and Technology;
Wuhan 430074;
China;
China National Erzhong Group Deyang Wanhang Die Forging Co.LTD;
Deyang 618000;
China;
High-strength steel; Grain growth; Dynamic recrystallization; Grain size model; Numerical simulation;