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<p>In the realm of high-performance wind power gearboxes, the manufacturing process of 100CrMo7-3 bearing rings is significantly influenced by hot deformation, which is crucial for microstructural refinement. But research on the microstructural evolution during the hot deformation of 100CrMo7-3 bearing steel is sparse. This study utilizes a thermo-mechanical simulator to conduct high-temperature compression tests, enabling the observation of the morphology of the original austenite grain boundaries. We develop a high-temperature flow stress model, a dynamic recrystallization volume fraction model, and an austenite grain size model for 100CrMo7-3 bearing steel, each demonstrating high predictive accuracy. Additionally, we compare the dynamics of austenite dynamic recrystallization in 100CrMo7-3 bearing steel with that of the widely used GCr15 bearing steel. Our findings indicate that the dynamic recrystallization of austenite in 100CrMo7-3 bearing steel is retarded due to the increased content of highly hardenable elements such as Mn and Mo. This research provides essential foundational model parameters for investigating the microstructural evolution and optimizing the hot working process of 100CrMo7-3 bearing steel.</p>

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Construction of the Constitutive Model and Austenite Recrystallization Model of 100CrMo7-3 Bearing Steel for Wind Power Gearbox

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Yongpeng Zhang,
  • Qiwei Zhang,
  • Jun Chen,
  • Yubin Wang,
  • Peng Jiang,
  • Xinjun Shen,
  • Xiaonan Wang,
  • Dafang Shi

摘要

In the realm of high-performance wind power gearboxes, the manufacturing process of 100CrMo7-3 bearing rings is significantly influenced by hot deformation, which is crucial for microstructural refinement. But research on the microstructural evolution during the hot deformation of 100CrMo7-3 bearing steel is sparse. This study utilizes a thermo-mechanical simulator to conduct high-temperature compression tests, enabling the observation of the morphology of the original austenite grain boundaries. We develop a high-temperature flow stress model, a dynamic recrystallization volume fraction model, and an austenite grain size model for 100CrMo7-3 bearing steel, each demonstrating high predictive accuracy. Additionally, we compare the dynamics of austenite dynamic recrystallization in 100CrMo7-3 bearing steel with that of the widely used GCr15 bearing steel. Our findings indicate that the dynamic recrystallization of austenite in 100CrMo7-3 bearing steel is retarded due to the increased content of highly hardenable elements such as Mn and Mo. This research provides essential foundational model parameters for investigating the microstructural evolution and optimizing the hot working process of 100CrMo7-3 bearing steel.