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<p>Through thermodynamic calculations and experiments involving Fe<sub>2</sub>O<sub>3</sub> oxygenation and titanium deoxidation, the morphology, size, and distribution of inclusions in steel, as well as the microstructural characteristics of steel, were investigated. The experimental results showed that under the condition of three times of oxygenation and deoxidation processes, when the oxygen mass fraction in steel was controlled to be greater than 0.001%, oxygen in steel could react with titanium to form titanium oxides. Thermodynamic analysis demonstrated that the titanium oxides formed under these conditions were Ti<sub>2</sub>O<sub>3</sub>. After titanium deoxidation, the oxygen mass fraction in steel was around 0.001%, and the number density of titanium oxides with particle diameters less than 2 μm in the sample increased significantly. The number of titanium oxides between 2&#xa0;μm and 3&#xa0;μm remained basically unchanged. These inclusions could induce the precipitation of acicular ferrite, thereby refining the microstructure.</p>

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Non-Metallic Inclusions and Microstructure of Microalloyed C-Mn Steel via Titanium Multiple Deoxidation Process

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Fei Ding,
  • Yaohua Yao,
  • Xiaopu Fan,
  • Xiaofeng Wang

摘要

Through thermodynamic calculations and experiments involving Fe2O3 oxygenation and titanium deoxidation, the morphology, size, and distribution of inclusions in steel, as well as the microstructural characteristics of steel, were investigated. The experimental results showed that under the condition of three times of oxygenation and deoxidation processes, when the oxygen mass fraction in steel was controlled to be greater than 0.001%, oxygen in steel could react with titanium to form titanium oxides. Thermodynamic analysis demonstrated that the titanium oxides formed under these conditions were Ti2O3. After titanium deoxidation, the oxygen mass fraction in steel was around 0.001%, and the number density of titanium oxides with particle diameters less than 2 μm in the sample increased significantly. The number of titanium oxides between 2 μm and 3 μm remained basically unchanged. These inclusions could induce the precipitation of acicular ferrite, thereby refining the microstructure.