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<p>The deformability of low-melting-point plastic inclusions is crucial for preventing wire breaks in steel tire cord production. This deformability is governed not only by their composition but also by their crystalline state. The crystallization behavior and hot rolling deformation mechanisms of MnO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> inclusions in Si–Mn deoxidized steel were investigated. The inclusions underwent crystallization during heat treatment at 1150&#xa0;°C, leading to the precipitation of a SiO<sub>2</sub> phase. Hot compression experiments revealed a diffusion-dominated purification transformation during hot compression. As the rolling temperature increased, the content of the crystalline SiO<sub>2</sub> phase rose from 84.96% to 91.97%. At a reduction rate of 20%, the plastic deformability of the inclusions increased with temperature between 850 and 950&#xa0;°C. Between 950 and 1050&#xa0;°C, the effect of temperature stabilized, and the deformation behavior was primarily governed by the reduction rate. At reduction rates of 40% and 60%, the plastic deformability initially increased and then decreased, peaking at a rolling temperature of 950&#xa0;°C.</p>

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Effect of hot compression process on crystallization behavior and plastic deformation behavior of MnO–SiO2–Al2O3 inclusions

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Xiao-Dong Deng,
  • Xiao Xie,
  • Qi Xu,
  • Rodrigue Armel Muvunyi,
  • Jian-Li Li

摘要

The deformability of low-melting-point plastic inclusions is crucial for preventing wire breaks in steel tire cord production. This deformability is governed not only by their composition but also by their crystalline state. The crystallization behavior and hot rolling deformation mechanisms of MnO–SiO2–Al2O3 inclusions in Si–Mn deoxidized steel were investigated. The inclusions underwent crystallization during heat treatment at 1150 °C, leading to the precipitation of a SiO2 phase. Hot compression experiments revealed a diffusion-dominated purification transformation during hot compression. As the rolling temperature increased, the content of the crystalline SiO2 phase rose from 84.96% to 91.97%. At a reduction rate of 20%, the plastic deformability of the inclusions increased with temperature between 850 and 950 °C. Between 950 and 1050 °C, the effect of temperature stabilized, and the deformation behavior was primarily governed by the reduction rate. At reduction rates of 40% and 60%, the plastic deformability initially increased and then decreased, peaking at a rolling temperature of 950 °C.