CASTING CORE REMOVAL THROUGH THERMAL CYCLING

CASTING CORE REMOVAL THROUGH THERMAL CYCLING

A method of removing a core (70) of a cast component comprises providing a casting that includes a silica based ceramic core (70) in a temperature controlled closed volume; cycling temperature between a first temperature (T) and a second temperature (T) within the temperature controlled closed volum...

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Bibliographische Detailangaben
Hauptverfasser: HOLOWCZAK, John E, MARCIN, John J, BULLIED, Steven J, KERSCHT, Ingrid H, BRENEMAN, Ryan C, DAVIS, Dustin W
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:A method of removing a core (70) of a cast component comprises providing a casting that includes a silica based ceramic core (70) in a temperature controlled closed volume; cycling temperature between a first temperature (T) and a second temperature (T) within the temperature controlled closed volume that repeatedly subjects the silica based ceramic core (70) to a beta-to-alpha cristobalite transition that induces microfractures in the silica based ceramic core (70); and after the cycling temperature, chemically dissolving the silica based ceramic core (70) from the casting.