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Two Numerical Models for Optimization of the Foundry Technology of the Ceramics EUCOR

[+] Author Affiliations
Jana Dobrovska, Vera Dobrovska

VSB – Technical University of Ostrava, Ostrava, Czech Republic

Frantisek Kavicka, Karel Stransky, Josef Stetina

Technical University of Brno, Brno, Czech Republic

Jaromir Heger

Alstom Power Technology, Whetstone, Leicester, UK

Paper No. HT-FED2004-56144, pp. 883-889; 7 pages
doi:10.1115/HT-FED2004-56144
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 3
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4692-X | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

Corundo-baddeleyit material — EUCOR — is a heat- and wear-resistant material even at extreme temperatures. This article introduces a numerical model of solidification and cooling of this material in a non-metallic mould. The model is capable of determining the total solidification time of the casting and also the place of the casting which solidifies last. Furthermore, it is possible to calculate the temperature gradient in any point and time, and also determine the local solidification time and the solidification interval of any point. The local solidification time is one of the input parameters for the cooperating model of chemical heterogeneity. This second model and its application on samples of EUCOR prove that the applied method of measurement of chemical heterogeneity provides detailed quantitative information on the material structure and makes it possible to analyse the solidification process. The analysis of this process entails statistical processing of the results of the measurements of the heterogeneity of the components of EUCOR and performs correlation of individual components during solidification. The crystallisation process seems to be very complicated, where the macro- and microscopic segregations differ significantly. The verification of both numerical models was conducted on a real cast 350 × 200 × 400 mm block.

Copyright © 2004 by ASME

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