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Microsegregation and inclusion development during the casting of steel

Howe, A.A. (2007) Microsegregation and inclusion development during the casting of steel. In: Jones, H., (ed.) SP07 Proceedings of the 5th Decennial International Conference on Solidification Processing. Department of Engineering Materials, University of Sheffield. , Sheffield , pp. 76-79. ISBN ISBN-13: 978-0-9522507-4-6

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Abstract

The enrichment of composition in the residual liquid during solidification is of itself an important parameter regarding the fitness for purpose of the alloy and, furthermore, will have a major influence on the precipitates and oxide inclusions that can nucleate and/or grow in the mushy zone. Corus sought a relatively simple, rapid model for this microsegregation and its associated inclusion type and size, for predictions across the thickness of continuously cast steels, suitable for use in conjunction with macro-models but demonstrably superior to the use of analytical equations. Notably, the analytical equations employ constant temperature equilibrium and diffusivity data for a process that can cover a very wide temperature range, and the assumed growth laws coupled with these data have an implied thermal history at odds with the environment of the macroscopic model within which the algorithm is to be used. The development and use of this model are described, along with its validation against a proven but time-consuming Finite Difference program for this purpose.

Item Type: Book Section
Copyright, Publisher and Additional Information: Copyright © 2007 Howard Jones on behalf of the named authors.
Keywords: microsegregation, inclusion development, casting of steel
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User: Repository Officer
Date Deposited: 21 Aug 2007 17:11
Last Modified: 08 Feb 2013 16:54
Status: Published
Publisher: Department of Engineering Materials, University of Sheffield.
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/2639

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