Constitutive behavior of G13Cr4Mo4Ni4V bearing steel based on strain compensation

doi:10.13251/j.issn.0254-6051.2023.09.010

Abstract

Abstract: To study the flow stress behavior of G13Cr4Mo4Ni4V bearing steel at high temperature and acquire reasonable hot processing parameters, isothermal compression tests were carried out at deformation temperatures between 1223-1423 K and strain rates between 0.001-1 s^-1by Gleelle-3800. The relationship between flow stress and deformation temperature, deformation rate, strain and other factors was studied. In view of the influence of strain on material parameters, an Arrhenius constitutive model based on strain compensation was established within the high-temperature deformation temperature range. In addition, according to the power dissipation coefficient in the metal plastic deformation process and the instability criterion, the hot processing map of the bearing steel was jointly determined. The results show that the flow stress is negatively correlated with deformation temperature and positively correlated with strain rate. An Arrhenius constitutive model considering strain compensation is constructed, and the correlation coefficient R between the predicted flow stress and experimental data, as well as the absolute average relative error AARE, are 0.991 and 5.786%, respectively. The model has high prediction accuracy. Combined with power dissipation coefficient and instability criteria, the hot processing map of this alloy is calculated, which shows that the bearing steel has better hot processing property when the temperature is 1320-1400 K and the strain rate is 0.1-1 s^-1.

Key words: G13Cr4Mo4Ni4V bearing steel, flow stress behavior, strain compensation Arrhenius model, hot processing map

CLC Number:

TG142.1

Jiang Xiaojuan, Hu Mengjun, Sun Tao, Xiao Xinrui, Dong Mengyao, Zhang Haicheng. Constitutive behavior of G13Cr4Mo4Ni4V bearing steel based on strain compensation[J]. Heat Treatment of Metals, 2023, 48(9): 60-69.

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