Transactions of Materials and Heat Treatment

Title：Microstructural evolution and numerical simulation of 2.25Cr1Mo0.25Valloy steel during hot deformation

Authors： Huang Xi′na Bian Yi Liu Gang Zhai Yuewen Li Fengjiao Zhu Weidong Zhong Zhiping

Unit： Beijing Research Institute of Mechanical & Electrical Technology China First Heavy Industries

KeyWords： 2.25Cr1Mo0.25V steel high temperature rheological behavior dynamical recrystallization mathematical model

ClassificationCode：

year,vol(issue):pagenumber：2015,40(1):148-153

Abstract：

Isothermal compressive experiments of 2.25Cr1Mo0.25V steel were carried out with hot-simulation machine of Gleeble -3500. High temperature flow stress-strain curves were gained over the range of deformation temperature from 900 to 1200 ℃, strain rate from 0.001 to 10 s-1 and 60% deformation degree. In addition, microstructural evolution of 2.25Cr1Mo0.25V steel under different deformation conditions was researched by both metallurgical tests and flow stress-strain curves and mathematical model of dynamic recrystallization of 2.25Cr1Mo0.25V steel was established during hot temperature plastic deformation. By combining the microstructure model with finite element method, the microstructural evolution was simulated during isothermal compressive deformation. The relative error is smaller than 11% by comparing the results of simulation and experiment. The correctness of model was tested.

Funds：

国家科技重大专项（2011ZX04002-101-002）

黄西娜（1987－），女，硕士研究生

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