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<p>The flow behavior and dynamic softening mechanism of three types of Cr16Mn8NiMoN during high-temperature deformation were investigated through thermal compression experiments. The experimental temperature range was set to 1000-1150&#xa0;°C, and the strain rate was controlled between 0.01 and 7&#xa0;s<sup>−1</sup>. The strain compensation constitutive equation was constructed based on the Arrhenius hyperbolic sine model, and the correlation coefficients <i>R</i> were all higher than 0.986, indicating high prediction accuracy. Through the construction of a processing map using a dynamic material model, high strain rates and low temperature regions were identified as prone to instability, while the safe processing window was found to be concentrated at high temperatures (&gt; 1075 °C) and low strain rates (&lt; 0.13&#xa0;s<sup>−1</sup>). Through the study of steel samples with three different N and Mo contents, nitrogen (N) significantly enhances the material's deformation resistance through solid solution strengthening, mainly by hindering dislocation movement; molybdenum (Mo) can reduce nitrogen aggregation, weaken its limiting effect on dislocations, and thus improve processing performance. The mechanism of synergistic regulation of high-temperature deformation behavior by the two provides a scientific basis for optimizing high-nitrogen-steel hot-working technology.</p>

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Study on High-Temperature Deformation Behavior and Hot-Processing Drawing of Cr16Mn8NiMoN Metastable Austenitic Stainless Steel

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Shiman Cao,
  • Shuwen Chen,
  • Donghao Wang,
  • Yingxue Teng,
  • Pengyu Wen,
  • Jing Guo

摘要

The flow behavior and dynamic softening mechanism of three types of Cr16Mn8NiMoN during high-temperature deformation were investigated through thermal compression experiments. The experimental temperature range was set to 1000-1150 °C, and the strain rate was controlled between 0.01 and 7 s−1. The strain compensation constitutive equation was constructed based on the Arrhenius hyperbolic sine model, and the correlation coefficients R were all higher than 0.986, indicating high prediction accuracy. Through the construction of a processing map using a dynamic material model, high strain rates and low temperature regions were identified as prone to instability, while the safe processing window was found to be concentrated at high temperatures (> 1075 °C) and low strain rates (< 0.13 s−1). Through the study of steel samples with three different N and Mo contents, nitrogen (N) significantly enhances the material's deformation resistance through solid solution strengthening, mainly by hindering dislocation movement; molybdenum (Mo) can reduce nitrogen aggregation, weaken its limiting effect on dislocations, and thus improve processing performance. The mechanism of synergistic regulation of high-temperature deformation behavior by the two provides a scientific basis for optimizing high-nitrogen-steel hot-working technology.