Journal article
Simulation of convection and macrosegregation in a large steel ingot
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.30(5), pp.1357-1366
1999
DOI: 10.1007/s11661-999-0284-5
Abstract
Melt convection and macrosegregation in casting of a large steel ingot are numerically simulated. The simulation is based on a previously developed model for multicomponent steel solidification with melt convection and involves the solution of fully coupled conservation equations for the transport phenomena in the liquid, mush, and solid. Heat transfer in the mold and insulation materials, as well as the formation of a shrinkage cavity at the top, is taken into account. The numerical results show the evolution of the temperature, melt velocity, and species concentration fields during solidification. The predicted variation of the macrosegregation of carbon and sulfur along the vertical centerline is compared with measurements from an industrial steel ingot that was sectioned and analyzed. Although generally good agreement is obtained, the neglect of sedimentation of free equiaxed grains prevents the prediction of the zone of negative macrosegregation observed in the lower part of the ingot. It is also shown that the inclusion of the shrinkage cavity at the top and the variation of the final solidification temperature due to macrosegregation is important in obtaining good agreement between the predictions and measurements.
Details
- Title: Subtitle
- Simulation of convection and macrosegregation in a large steel ingot
- Creators
- J. P GU - Department of Mechanical Engineering, University of Iowa, Iowa City, IA 52242, United StatesC BECKERMANN - Department of Mechanical Engineering, University of Iowa, Iowa City, IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.30(5), pp.1357-1366
- Publisher
- Springer; New York, NY
- DOI
- 10.1007/s11661-999-0284-5
- ISSN
- 1073-5623
- eISSN
- 1543-1940
- Language
- English
- Date published
- 1999
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064578002771
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