METHOD FOR FIRING A CERAMIC AND REFRACTORY METAL CASTING CORE

A method for plasticizing a ceramic and refractory metal casting core is provided to protect a non-ceramic casting core element from excessive oxidation generated in executing a similar heating operation in the oxidizing atmosphere, by using the non-oxidizing atmosphere. A method(20) for plasticizin...

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Bibliographic Details
Main Authors VERNER CARL R, BULLIED STEVEN J, BOCHIECHIO MARIO P, KENNARD LEA D, MARCIN JOHN J. JR
Format Patent
LanguageEnglish
Published 16.10.2007
Subjects
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Summary:A method for plasticizing a ceramic and refractory metal casting core is provided to protect a non-ceramic casting core element from excessive oxidation generated in executing a similar heating operation in the oxidizing atmosphere, by using the non-oxidizing atmosphere. A method(20) for plasticizing a ceramic and refractory metal casting core comprises the steps of: making compounds of a ceramic casting core element and a non-ceramic casting core element; heating the compounds up to the first temperature of the atmosphere of at least 316°C(600°F) in the oxidizing atmosphere(28); and heating the compounds up to the second temperature of the atmosphere of at least 817°C(1600°F) in the non-oxidizing atmosphere(42). In the forming step, the ceramic casting core element is formed on the non-ceramic casting core element and the non-ceramic casting core element is shaped from a refractory metal sheet.
Bibliography:Application Number: KR20070000509