Volume 38 Issue 1
Jul.  2021
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TANG Hai-yan, YANG Mao-sheng, MENG Wen-jia, LI Jing-she. Hot deformation behavior of Cr-Co-Mo-Ni gear steel and finite element simulation of the die forging process[J]. Chinese Journal of Engineering, 2016, 38(1): 77-86. DOI: 10.13374/j.issn2095-9389.2016.01.011
Citation: TANG Hai-yan, YANG Mao-sheng, MENG Wen-jia, LI Jing-she. Hot deformation behavior of Cr-Co-Mo-Ni gear steel and finite element simulation of the die forging process[J]. Chinese Journal of Engineering, 2016, 38(1): 77-86. DOI: 10.13374/j.issn2095-9389.2016.01.011
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Hot deformation behavior of Cr-Co-Mo-Ni gear steel and finite element simulation of the die forging process

  • 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;

  • 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing 100083, China;

  • 3. Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China

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  • Received Date: June 17, 2015
  • Available Online: July 04, 2021
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    • Abstract
  • Large strain isothermal compression tests were carried out on a Gleeble-3800 thermal simulator to study the high temperature deformation behavior of Cr-Co-Mo-Ni gear steel. The constitutive equation and hot processing map of the steel were established based on experiment data. The results show that the flow stress decreases with increasing temperature,but increases with increasing strain rate. The flow stress can be described by the constitutive equation in a hyperbolic sine function and the averaged value of activation energy is 487.21 kJ·mol-1. The proper hot working regions shown by the hot processing map are the temperature of 1000-1100℃ and the strain rate of 0.1-1 s-1. In addition,the forging processes were simulated by finite element method based on the experiment,the effects of initial forging temperature and passes on the temperature and strain rate of forgings were analyzed,and the proper forging process parameters were obtained which are the initial forging temperature of 1000-1100℃ and the forging passes of 15.
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