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<p>Hot compression tests were conducted on 0.36N martensitic stainless steel using a Gleeble-3800 thermal simulator to obtain true stress–true strain curves under deformation temperatures ranging from 850 to 1150&#xa0;°C and strain rates from 0.01 to 10&#xa0;s<sup>−1</sup>. Based on these data, an Arrhenius constitutive model was established and validated for the 0.36N martensitic stainless steel. Power dissipation maps and activation energy maps were constructed, and microstructural analysis of the central region of compressed samples was performed using optical microscopy (OM) and scanning electron microscopy (SEM). A conceptual hot processing map was developed for the 0.36N martensitic stainless steel. The results indicate that the flow stress of the steel is highly sensitive to temperature and strain rate, increasing with decreasing temperature or increasing strain rate. The hot deformation activation energy was calculated to be&#xa0;<i>Q</i> = 653.365&#xa0;kJ/mol. The optimal processing windows were identified as (1050-1150&#xa0;°C/0.01-0.036&#xa0;s<sup>−1</sup>) and (1000-1150&#xa0;°C/1-10&#xa0;s<sup>−1</sup>).</p>

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Thermal Deformation Behavior and Microstructural Analysis of 0.36N Martensitic Bearing Stainless Steel

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Wenyi Liu,
  • Yaohui Song,
  • Yugui Li,
  • Hui Xu,
  • Yibo Lu,
  • Yihang Wang

摘要

Hot compression tests were conducted on 0.36N martensitic stainless steel using a Gleeble-3800 thermal simulator to obtain true stress–true strain curves under deformation temperatures ranging from 850 to 1150 °C and strain rates from 0.01 to 10 s−1. Based on these data, an Arrhenius constitutive model was established and validated for the 0.36N martensitic stainless steel. Power dissipation maps and activation energy maps were constructed, and microstructural analysis of the central region of compressed samples was performed using optical microscopy (OM) and scanning electron microscopy (SEM). A conceptual hot processing map was developed for the 0.36N martensitic stainless steel. The results indicate that the flow stress of the steel is highly sensitive to temperature and strain rate, increasing with decreasing temperature or increasing strain rate. The hot deformation activation energy was calculated to be Q = 653.365 kJ/mol. The optimal processing windows were identified as (1050-1150 °C/0.01-0.036 s−1) and (1000-1150 °C/1-10 s−1).