Kinetic model of non-metallic inclusions' precipitation during steel solidification

A numerical simulation which describes precipitation of non-metallic inclusions (liquid or solid oxides, nitrides) during steel solidification is proposed. Its aim is to predict the compositions and size distributions of these precipitates. The model takes into account microsegregation and includes...

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Bibliographic Details
Published inJournal of non-crystalline solids Vol. 282; no. 1; pp. 61 - 71
Main Authors Lehmann, Jean, Rocabois, P, Gaye, H
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2001
Elsevier
Subjects
Applied sciences
Exact sciences and technology
Foundry engineering
Metals. Metallurgy
Other casting methods. Solidification
Production techniques
C290
M140
K100
P050
Kinetic model
Particle size
Precipitation
Growth rate
Growth mechanism
Theoretical study
Non metallic inclusion
Numerical simulation
Chemical composition
Steel
Solidification
Microsegregation
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Summary:A numerical simulation which describes precipitation of non-metallic inclusions (liquid or solid oxides, nitrides) during steel solidification is proposed. Its aim is to predict the compositions and size distributions of these precipitates. The model takes into account microsegregation and includes homogeneous nucleation in the interdendritic liquid, and a mixed-controlled growth stage combining transport of solute elements in the boundary layer around precipitates and interfacial kinetics. We have observed that the calculated compositions of oxide inclusions differ from those of inclusions precipitating at equilibrium and are close to industrial observations on semi-killed steels.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(01)00329-5