4.5 Article

Chemical Composition Modification of Inclusions in Steels by Controlled Ca Treatment

Publisher

SPRINGER
DOI: 10.1007/s11663-021-02287-3

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Funding

  1. Center for Iron and Steelmaking Research
  2. International Postdoctoral Exchange Fellowship Program (2017) by China Postdoctoral Council
  3. National Natural Science Foundation of China [52074198, 51604201]
  4. [MCF-677785]

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This study conducted five plant trials with varying Ca-total/O-total ratios and different Al and S contents in steels to validate thermodynamic model predictions for the liquid window. The results showed good agreement between model predictions and experimental findings, with the window succinctly represented by the ratio of Ca in sulfide inclusions to Ca in oxide inclusions.
Five plant trials with high, medium, and low Ca-total/O-total ratios, as well as higher Al and S contents in steels were conducted to study the validity of thermodynamic model predictions for the liquid window-where inclusions are liquid after Ca-treatment. The window can be succinctly represented by the ratio of Ca in sulfide inclusions to Ca in oxide inclusions. There was good agreement between model predictions and experimental results.

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