CASTING PROCESS FOR NICKEL BASE ALLOYS

CASTING PROCESS FOR NICKEL BASE ALLOYS

A casting process and castings produced thereby wherein a nickel-base, chrominum containing alloy which also contains sufficient amounts of aluminum and titanium to produce eutectic gamma-prime phase in the alloy as cast is caused to contain about 0.5 percent to about 5 percent hafnium, is cast into...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JOHN HOCKIN, CARL H. LUND, MICHAEL J. WOULDS
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:A casting process and castings produced thereby wherein a nickel-base, chrominum containing alloy which also contains sufficient amounts of aluminum and titanium to produce eutectic gamma-prime phase in the alloy as cast is caused to contain about 0.5 percent to about 5 percent hafnium, is cast into final configuration and is cooled from the molten state rapidly through the range of 2,200 DEG to 1,850 DEG F. to maximize creep characteristics at 1,800 DEG F. while at the same time providing castings which are thermally conditioned to exhibit good mechanical characteristics, especially prior creep at 1,400 DEG F.