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Inclusion Evolution in Al-Killed Ca-Treated Steels at Heat Treatment Temperature In Situ Observed Using Confocal Scanning Laser Microscope

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Abstract

In situ observation and elemental mapping were combined to better understand the evolution mechanism of inclusions from CaO–MgO–Al2O3 to CaO–MgO–Al2O3–CaS in Al-killed Ca-treated steels at 1273 K to 1473 K. During the heating process, the surface layer of CaS gradually formed on the MgO–Al2O3 core in inclusions. The thickness of the surface layer increased with time. The higher heating temperature promoted the generation of the CaS phase in inclusions due to the faster element diffusion.

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, P.R. China

    Hong Liu, Weifu Li, Changyu Ren & Ying Ren

  2. School of Mechanical and Materials Engineering, North China University of Technology, Beijing, 100144, P.R. China

    Lifeng Zhang

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  1. Hong Liu
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  2. Weifu Li
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  3. Changyu Ren
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  4. Lifeng Zhang
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  5. Ying Ren
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Correspondence to Lifeng Zhang or Ying Ren.

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Liu, H., Li, W., Ren, C. et al. Inclusion Evolution in Al-Killed Ca-Treated Steels at Heat Treatment Temperature In Situ Observed Using Confocal Scanning Laser Microscope. Metall Mater Trans B 53, 1323–1328 (2022). https://doi.org/10.1007/s11663-022-02472-y

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  • DOI: https://doi.org/10.1007/s11663-022-02472-y

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