Volume 45 Issue 2
Feb.  2024
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Gu Meirong, Cao Yanfeng, Peng Lingling, Yu Hongxing, Ou Ping, Wang Hebin, Li Chengbo, Liu Xiaoming, Rong Sheng, Li Ling. Study on characteristics of hot deformation in Super304H austenitic heat-resistant steel[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 162-170. doi: 10.7513/j.issn.1004-7638.2024.02.023
Citation: Gu Meirong, Cao Yanfeng, Peng Lingling, Yu Hongxing, Ou Ping, Wang Hebin, Li Chengbo, Liu Xiaoming, Rong Sheng, Li Ling. Study on characteristics of hot deformation in Super304H austenitic heat-resistant steel[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 162-170. doi: 10.7513/j.issn.1004-7638.2024.02.023
shu

Study on characteristics of hot deformation in Super304H austenitic heat-resistant steel

doi: 10.7513/j.issn.1004-7638.2024.02.023
  • 1.

    School of Materials and Environment, Guangxi Minzu University, Nanning 530105, Guangxi, China

  • 2.

    College of Rare Earths, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

  • 3.

    School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China

  • 4.

    Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, Nanning 530105, Guangxi, China

  • 5.

    Guangxi Colleges and Universities Key Laboratory of Environmental-friendly Materials and New Technology for Carbon Neutralization, Nanning 530105, Guangxi, China

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  • Received Date: 2023-06-26
    Available Online: 2024-04-30
  • Publish Date: 2024-04-30
    Abstract
  • Hot compression test of Super304H austenitic steel was carried out by using a MMS-100 thermal mechanical simulator at 900～1200 ℃ and 0.1～10 s−1. Based on the true stress-true strain test data, the Zener-Hollomon constitutive model of the studied steel was established by using a strain compensation method, and the hot processing maps under a true strain range of 0.02～0.7 was drawn according to the dynamic material theory. The results show that high temperature and low strain rate are conducive to the occurrence of dynamic recrystallization in Super304H austenitic steel during the hot deformation process. The correlation coefficient and average relative error between the values of flow stress predicted by the constitutive model and experimental values are 0.989 and 7.007%, respectively, reflecting that the established model is relatively accurate and can be used to predict the flow behavior of Super304H austenitic steel under hot compression. Super304H austenitic steel will have a good hot-working stability after deformation reaching a certain degree. The optimal hot working parameter ranges of Super304H austenitic steel determined by the hot processing maps are 1160～1200 ℃/0.1～0.55 s−1.
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