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<p>This study examines the effects of varying solid-solution temperatures on the microstructure, strength, and toughness of 00Cr10Ni8Co6Mo3 martensitic aging steel. The steel properties were analyzed using scanning electron microscopy and x-ray diffraction techniques. The results demonstrate that the experimental steel, which was solution treated at 750&#xa0;°C, exhibits excellent strength and toughness matching. This behavior is attributed to the toughening effect of residual/reverse-transformation austenite, grain refinement, and enhanced aging-strengthening of the nondiffusive <i>α</i>′ → <i>γ</i> phase transformation. Additionally, a pretreatment process was applied to the experimental steels prior to the conventional solution treatment, resulting in an improved strength-toughness balance (room temperature <i>R</i><sub>el</sub> = 1036&#xa0;MPa, AKV<sub>2</sub> (− 196&#xa0;°C) = 66&#xa0;J).</p>

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Effect of Solution Process on Microstructure and Properties of Martensitic Aging Steel for Low Temperatures

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Hui Li,
  • Yanmei Li,
  • Xiangtao Deng,
  • Hao Xu

摘要

This study examines the effects of varying solid-solution temperatures on the microstructure, strength, and toughness of 00Cr10Ni8Co6Mo3 martensitic aging steel. The steel properties were analyzed using scanning electron microscopy and x-ray diffraction techniques. The results demonstrate that the experimental steel, which was solution treated at 750 °C, exhibits excellent strength and toughness matching. This behavior is attributed to the toughening effect of residual/reverse-transformation austenite, grain refinement, and enhanced aging-strengthening of the nondiffusive α′ → γ phase transformation. Additionally, a pretreatment process was applied to the experimental steels prior to the conventional solution treatment, resulting in an improved strength-toughness balance (room temperature Rel = 1036 MPa, AKV2 (− 196 °C) = 66 J).