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<p>Austenite grain growth in the segregation region of Cr–Mo–V oil casing steel bloom via different holding temperatures was conducted. The results indicated that at 1150&#xa0;°C, VC pinned grain boundaries and alloying elements such as Mo exerted a solute drag effect, both of which hindered grain growth. In contrast, at 1250&#xa0;°C, grain refinement occurred solely due to the solute drag effect. Furthermore, when the temperature increased to 1350&#xa0;°C, rapid grain growth and local remelting in the segregation region appeared.</p>

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Abnormal Evolution of Austenite Grains in Elements Segregation Region of Cr–Mo–V Alloyed Steel Round Bloom via Holding Temperatures of 1150 °C to 1350 °C

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • Guangxin Song,
  • Wanlin Wang,
  • Ce Liang,
  • Yinghui Zhao,
  • Jie Zeng

摘要

Austenite grain growth in the segregation region of Cr–Mo–V oil casing steel bloom via different holding temperatures was conducted. The results indicated that at 1150 °C, VC pinned grain boundaries and alloying elements such as Mo exerted a solute drag effect, both of which hindered grain growth. In contrast, at 1250 °C, grain refinement occurred solely due to the solute drag effect. Furthermore, when the temperature increased to 1350 °C, rapid grain growth and local remelting in the segregation region appeared.