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<p>Inclusions have a significant impact on the properties of steel. The complex inclusions of MnS-Al<sub>2</sub>O<sub>3</sub> in high-speed wheel steel largely reduce the stress concentration around the inclusion and enhance the toughness of the steel. Hot working is inevitable in the processing of high-speed wheel steel. Thus, it is necessary to explore the best heat treatment process to reduce the proportion of Al<sub>2</sub>O<sub>3</sub> inclusions and increase the proportion of complex inclusions. In this work, the relationship between MnS proportion and inclusion rate was obtained by analyzing the mass fraction of elements in complex inclusions with different parcel degrees. Then, the evolution process of inclusions in the heat treatment process is analyzed through thermodynamic calculation. Finally, the change of inclusions is detected and analyzed by heat treatment experiment, and the best heat treatment process for the formation of MnS-Al<sub>2</sub>O<sub>3</sub> complex inclusions was explored.</p>

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Control of MnS-Al2O3 complex inclusions in high-speed wheel steel

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Xiaopei Guo,
  • Liying Ju,
  • Tao Li,
  • Min Tan,
  • Zhongliang Song,
  • Mingfeng Shao,
  • Jie Dang

摘要

Inclusions have a significant impact on the properties of steel. The complex inclusions of MnS-Al2O3 in high-speed wheel steel largely reduce the stress concentration around the inclusion and enhance the toughness of the steel. Hot working is inevitable in the processing of high-speed wheel steel. Thus, it is necessary to explore the best heat treatment process to reduce the proportion of Al2O3 inclusions and increase the proportion of complex inclusions. In this work, the relationship between MnS proportion and inclusion rate was obtained by analyzing the mass fraction of elements in complex inclusions with different parcel degrees. Then, the evolution process of inclusions in the heat treatment process is analyzed through thermodynamic calculation. Finally, the change of inclusions is detected and analyzed by heat treatment experiment, and the best heat treatment process for the formation of MnS-Al2O3 complex inclusions was explored.