Simulation of dynamic recrystallization in 23Co13Ni11Cr3Mo steel using a modified cellular automaton  

作　　者：黄始全 易幼平 李蓬川 何海林 

机构地区：[1]State Key Laboratory of High Performance Complex Manufacturing (School of Mechanical and Electrical Engineering,Central South University) [2]Wanhang Die Forging Factory,China National Erzhong Group Co.

出　　处：《Journal of Central South University》2014年第2期454-459,共6页中南大学学报（英文版）

基　　金：Project(2011CB706802)supported by the National Basic Research Program of China;Project(2012ZX04010-081)supported by National Science and Technology Major Program of China

摘　　要：A modified cellular automaton(CA) program was developed to simulate the process of dynamic recrystallization(DRX) for 23Co13Ni11Cr3Mo ultrahigh strength steel.In this model,influences of deformation parameters on hardening rate and solute drag effect were considered.Moreover,an inverse analysis method was proposed for parameters identification of dislocation model and solute drag effect based on the results of isothermal compression tests on Gleeble-1500.Then,simulated microstructures under different deformation conditions were compared with those of experiments.A good agreement is achieved.Furthermore,influences of deformation parameters on microstructure evolution for 23Co13Ni11Cr3Mo steel were investigated in details.High strain is an effective measure to refine grain and improve homogeneity.Meanwhile,the desired deformation parameters are temperature of 1000-1050 °C and strain rate of 0.008-0.01 s-1 for obtaining grains smaller than 22.5 μm.A modified cellular automaton（CA） program was developed to simulate the process of dynamic recrystallization（DRX） for 23Co13Ni11Cr3Mo ultrahigh strength steel.In this model,influences of deformation parameters on hardening rate and solute drag effect were considered.Moreover,an inverse analysis method was proposed for parameters identification of dislocation model and solute drag effect based on the results of isothermal compression tests on Gleeble-1500.Then,simulated microstructures under different deformation conditions were compared with those of experiments.A good agreement is achieved.Furthermore,influences of deformation parameters on microstructure evolution for 23Co13Ni11Cr3Mo steel were investigated in details.High strain is an effective measure to refine grain and improve homogeneity.Meanwhile,the desired deformation parameters are temperature of 1000-1050 °C and strain rate of 0.008-0.01 s-1 for obtaining grains smaller than 22.5 μm.

关 键 词：cellular automaton dynamic recrystallization 23Co13Ni11Cr3Mo ultrahigh strength steel 

分 类 号：TG142.1[一般工业技术—材料科学与工程]