Heat Treatment of Metals ›› 2020, Vol. 45 ›› Issue (7): 51-56.DOI: 10.13251/j.issn.0254-6051.2020.07.011

• PROCESS RESEARCH • Previous Articles     Next Articles

Hot deformation behavior and processing maps of 022Cr steel

Li Rongbin1,2,3, Chen Yongqiang1, Jiang Chunxia2,3, Zhang Rulin2,3, Shang Hailong2,3   

  1. 1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2. School of Materials Science and Engineering, Shanghai Dianji University, Shanghai 201306, China;
    3. Shanghai Engineering Research Center of Large Piece Hot Manufacturing, Shanghai Dianji University, Shanghai 201306, China
  • Received:2019-12-22 Online:2020-07-25 Published:2020-09-07

Abstract: Hot deformation behavior of the 022Cr steel was studied by a Gleeble 3180 thermal simulation test machine, and the relationship between deformation resistance and deformation degree, deformation temperature and strain rate was revealed. The thermal compression was performed at temperature in range of 950-1200 ℃ and at strain rate in range of 0.001-5 s-1, and a dynamic deformation model of the 022Cr steel was established by using a dynamic material model (DMM). The results show that as the deformation temperature increases and the strain rate decreases, the flow stress of the 022Cr steel decreases. The deformation activation energy calculated from the data of the flow stress curve is 381.615 kJ/mol. When the strain is not less than 0.5, the optimal deformation conditions of the 022Cr steel for hot working have two regions. The first region is in the temperature range of 1100-1200 ℃, the strain rate is in the range of 0.001-0.01 s-1, and the second region is in the temperature range of 1130-1180 ℃, strain rate range of 1-5 s-1, its power consumption efficiency can reach more than 0.4.

Key words: 022Cr steel, hot compression, constitutive equation, processing map, microstructure

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