MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
New Compo-Casting Method of Ceramics Inserted Cast Iron Reducing Thermal Stress
Yoshihiro TomitaHaruyoshi Sumimoto
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2006 Volume 47 Issue 1 Pages 162-169

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Abstract

The compo-casting of ceramics by cast iron is expected to be one of the useful casting process that can expand the application fields of cast iron. The largest problem in compo-casting method is cracking caused by thermal shock. Although this cracking can be prevented by reducing the thermal stress by preheating ceramics, the necessary preheating temperature is high and its precise control is difficult at practical foundries. In this study, we tried to estimate numerically the critical preheating temperature of ceramics using the thermal stress analysis during transient thermal conduction and the Newman’s diagram. We also found that the preheating of ceramics to reduce thermal stress can be replaced with placing an appropriate cast iron covers around the ceramics. We describe new compo-casting method that needs no preheating of ceramics and proved the usefulness experimentally.

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© 2006 Japan Foundary Engineering Society
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