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Effect of Silicon on the Cast Macrostructure of Fe-Si Alloys

Published online by Cambridge University Press:  21 February 2012

H. J. A. García ,
M. H. Cruz ,
A. A. Balandra ,
F. G. González  and
Y Houbaert
H. J. A. García
Affiliation:
Departamento de Ingenieria Metalurgica, Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria Coyoacan 04510, México D.F. Email: abrilbalandra@hotmail.com
M. H. Cruz
Affiliation:
Departamento de Ingenieria Metalurgica, Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria Coyoacan 04510, México D.F. Email: abrilbalandra@hotmail.com
A. A. Balandra
Affiliation:
Departamento de Ingenieria Metalurgica, Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria Coyoacan 04510, México D.F. Email: abrilbalandra@hotmail.com
F. G. González
Affiliation:
Departamento de Ingenieria Metalurgica, Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Cd. Universitaria Coyoacan 04510, México D.F. Email: abrilbalandra@hotmail.com
Y Houbaert
Affiliation:
Departamento de Ciencia e Ingenieria de Materiales, Universidad de Gante, Gante Belgica
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Abstract

In this work was studied the effect of silicon content from 0.5 to 3 wt.% Si on the macrostructure of casting ingots. Fe-Si alloys with low contents of impurities were produced in electric induction furnace under inert atmosphere. Castings of 12.5 cm thick, 25 cm long and 30 cm high were obtained of each alloy poured into metallic mould. The ingots obtained were sectioned in slices of 12 cm wide, 25 cm high and 2 cm thick, the central slice of each ingot was prepared metallographically to reveal the macrostructure of the six cast alloys. The results indicate that alloys with low silicon levels (0.5 and 1.0% Si) and with small solidification intervals have relatively fine equiaxed grains, while alloys with higher silicon content and a higher solidification intervals present predominantly columnar grains. These macrostructures are not the usually structures linked to short and long freezing range. Another important result is the absence of dendritic structure usually present in cast alloys.

Keywords

Grain sizeHardnessMagnetic propertiesCastingDirectional solidification
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1372: Symposium S3 – Structural and Chemical Characterization of Metal Alloys and Compounds—2011 , 2012 , imrc-1372-s3-p70
Copyright
Copyright © Materials Research Society 2012

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References

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