METHODS FOR MANUFACTURING INVESTMENT CASTING SHELLS

METHODS FOR MANUFACTURING INVESTMENT CASTING SHELLS

An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essen...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: VERNER CARL R, PERSKY JOSHUA E, SNYDER JACOB A, MURRAY STEPHEN D, KENNARD LEA D, BEALS JAMES T, MANDICH DAWN D
Format: Patent
Sprache:eng
Schlagworte:
CASTING
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essentially non-oxidizing conditions at a higher temperature.