Thermodynamic Analysis of Oxide Nucleation in Steel Cooling Process

Zhi Qiang Li; Jing Kun Yu

doi:10.4028/www.scientific.net/AMR.282-283.478

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 282-283Thermodynamic Analysis of Oxide Nucleation in...

Thermodynamic Analysis of Oxide Nucleation in Steel Cooling Process

Abstract:

Nucleating mechanism and controlling methods of Al₂O₃-TiO₂ inclusion formed during steel cooling process is analyzed in this paper. According to the theory of nucleation, only TiO₂could satisfy the critical requirement of homogeneous nucleation to solidify stably when the temperature declines to less than 1863K. Furthermore, the generation of Al₂O₃ adhering on the surface of solid TiO₂ is going to take place through heterogeneous nucleation, and then Al₂O₃ interacts with TiO₂ to form Al₂O₃-TiO₂ complex oxide. There would be no Al₂O₃-TiO₂ complex oxide or much less Al₂O₃ on condition that the w_Ti·w_O2 is less than 3.96×10^-8. Both deeply deoxygenating treatments and controlling the mass of Ti-Fe alloy added into steel are effective means for improving steel quality.

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Periodical:

Advanced Materials Research (Volumes 282-283)

Pages:

478-482

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.282-283.478

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Online since:

July 2011

Authors:

Zhi Qiang Li, Jing Kun Yu

Keywords:

Nucleation, Oxide Inclusion, Thermodynamic Analysis

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