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The size, distribution, and precipitation amount of the second phase in the slab have a significant impact on the quality and performance of the slab and the final product. Ti(Cx,N1-x) is the main precipitate in the Ti-containing 22MnB5 steel. Clarifying the “precipitation-redissolution” evolution law of Ti(Cx,N1-x) during TSCR process has important guiding significance for optimizing TSCR process parameters and improving slab quality. A quantitative analysis was conducted on the evolution law of Ti(Cx,N1-x) “precipitation-redissolution-coarsening” in the TSCR process through thermal simulation experiments, and a detailed comparison was made with traditional processes. At the end of TSCR casting process, the volume fraction of Ti(Cx,N1-x) is 0.0256%, and the average size of Ti(Cx,N1-x) is 0.16 μm. The volume fraction of Ti(Cx,N1-x) decreased by 14.45% during the TSCR heating process. The average size of Ti(Cx,N1-x) increased by 20% during the TSCR holding process. The maximum particle size of Ti(Cx,N1-x) before and after soaking decreased by 42.34% in TSCR process, while increased by 8.020% in traditional process. The research results provide a theoretical basis for the high-quality and stable production of Ti-containing 22MnB5 steel by TSCR process.

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Precipitation and Dissolution Behavior of Ti(Cx,N1-x) During the TSCR Process of Ti-Containing 22MnB5 Steel

  • 会议论文

  • 发表日期：

    2025年

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  • Haohao Zhang,
  • Songyuan Ai,
  • Mujun Long,
  • Danbin Jia,
  • Dengfu Chen,
  • Huamei Duan

摘要

The size, distribution, and precipitation amount of the second phase in the slab have a significant impact on the quality and performance of the slab and the final product. Ti(Cx,N1-x) is the main precipitate in the Ti-containing 22MnB5 steel. Clarifying the “precipitation-redissolution” evolution law of Ti(Cx,N1-x) during TSCR process has important guiding significance for optimizing TSCR process parameters and improving slab quality. A quantitative analysis was conducted on the evolution law of Ti(Cx,N1-x) “precipitation-redissolution-coarsening” in the TSCR process through thermal simulation experiments, and a detailed comparison was made with traditional processes. At the end of TSCR casting process, the volume fraction of Ti(Cx,N1-x) is 0.0256%, and the average size of Ti(Cx,N1-x) is 0.16 μm. The volume fraction of Ti(Cx,N1-x) decreased by 14.45% during the TSCR heating process. The average size of Ti(Cx,N1-x) increased by 20% during the TSCR holding process. The maximum particle size of Ti(Cx,N1-x) before and after soaking decreased by 42.34% in TSCR process, while increased by 8.020% in traditional process. The research results provide a theoretical basis for the high-quality and stable production of Ti-containing 22MnB5 steel by TSCR process.