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Metallurgical and Materials Transactions B

, Volume 47, Issue 3, pp 1613–1625 | Cite as

Evaluation of Steel Cleanliness in a Steel Deoxidized Using Al

  • Edgar-Ivan Castro-Cedeño
  • Martín Herrera-TrejoEmail author
  • Manuel Castro-Román
  • Fabián Castro-Uresti
  • Monserrat López-Cornejo
Article

Abstract

The effect of magnesium in the aluminum used as a deoxidizer on the cleanliness of steel was studied throughout a steelmaking route for the production of thin slabs. Two deoxidizers with different Mg contents were used. The Mg content of a “typical” deoxidizer was ~0.5 wt pct Mg, whereas that for an alternative deoxidizer was ~2 wt pct Mg. The inclusion population at different stages of the steelmaking process was characterized in terms of chemical composition, number, and size distribution. The inclusion modification path shows that the solid Al2O3 and Al2O3-MgO inclusions formed in the early stage of the steel ladle treatment are modified into Al2O3-MgO-CaO liquid and MgO-Al2O3-liquid inclusions. Although some slight differences were observed in the ladle furnace samples, the chemical composition of inclusions was similar in the samples taken at the mold of the continuous casting, regardless of the deoxidizer used. Gumbel, generalized extreme value (GEV), and generalized Pareto (GP) distributions were used for the description of the size distribution. The GEV and GP distributions resulted in proper distributions to describe the evolution of size distribution throughout the steelmaking process. Furthermore, no statistically significant differences between inclusion size distributions resulting from the use of either deoxidizer were found.

Keywords

Complex Inclusion Generalize Extreme Value Liquid Steel Generalize Pareto Distribution Cumulative Density Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2016

Authors and Affiliations

  • Edgar-Ivan Castro-Cedeño
    • 1
  • Martín Herrera-Trejo
    • 1
    Email author
  • Manuel Castro-Román
    • 1
  • Fabián Castro-Uresti
    • 2
  • Monserrat López-Cornejo
    • 3
  1. 1.Centro de Investigación y de Estudios AvanzadosCINVESTAV SaltilloRamos ArizpeMexico
  2. 2.Process Engineering DepartmentTernium MéxicoSan Nicolás de los GarzaMexico
  3. 3.Process Engineering DepartmentTernium MéxicoXoxtlaMexico

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