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Hot deformation behaviors and flow stress model of GCr15 bearing steel

  • Shu-lun Liao (廖舒纶)
  • Li-wen Zhang (张立文)Email author
  • Chong-xiang Yue (岳重祥)
  • Ji-bin Pei (裴继斌)
  • Hui-ju Gao (高惠菊)
Article

Abstract

The hot deformation behaviors of GCr15 bearing steel were investigated by isothermal compression tests, performed on a Gleeble-3800 thermal-mechanical simulator at temperatures between 950 °C and 1 150 °C and strain rates between 0.1 and 10 s−1. The peak stress and peak strain as functions of processing parameters were obtained. The dependence of peak stress on strain rate and temperature obeys a hyperbolic sine equation with a Zener-Hollomon parameter. By regression analysis, in the temperature range of 950−1 150 °C and strain rate range of 0.1−10 s−1, the mean activation energy and the stress exponent were determined to be 351 kJ/mol and 4.728, respectively. Meanwhile, models of flow stress and dynamic recrystallization (DRX) grain size were also established. The model predictions show good agreement with experimental results.

Key words

GCr15 bearing steel flow stress dynamic recystallization hot deformation 

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Copyright information

© Central South University Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Shu-lun Liao (廖舒纶)
    • 1
    • 2
  • Li-wen Zhang (张立文)
    • 1
    • 2
    Email author
  • Chong-xiang Yue (岳重祥)
    • 1
    • 2
  • Ji-bin Pei (裴继斌)
    • 1
    • 2
  • Hui-ju Gao (高惠菊)
    • 3
  1. 1.State Key Laboratory for Materials ModificationDalian University of TechnologyDalianChina
  2. 2.School of Materials Science and EngineeringDalian University of TechnologyDalianChina
  3. 3.Rod and Wire Continuous Rolling MillDongbei Special Steel GroupDalianChina

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