Formation and Evolution of Al-Ti Oxide Inclusions during Secondary Steel Refining

DOI Web Site 被引用文献18件 参考文献23件
  • Van Ende Marie-Aline
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Guo Muxing
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Dekkers Rob
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Burty Marc
    ArcelorMittal Burns Harbor
  • Van Dyck Joris
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Jones Peter Tom
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Blanpain Bart
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven
  • Wollants Patrick
    Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven

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The process of Al deoxidation and Ti alloying during RH degassing treatment was studied under an Ar atmosphere at secondary steelmaking temperature (1600—1650°C) in an induction furnace equipped with an oxygen probe and a steel sampler. The formation of inclusions during partial Al deoxidation and Ti addition, and the reduction of Ti–Al–O inclusions by second Al addition are discussed using thermodynamic calculations. Specific attention is given to inclusion size and the compositional relation between the inclusions and the steel. The combination of experimental and calculated results shows that, in order to prevent Ti oxidation in liquid steel, it is essential to control [Al] in liquid steel to a level of approximately 200 ppm prior to Ti addition to achieve around 500 ppm [Ti] with minimal Ti loss during the alloying process.

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