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US 5,489,346 AGranted
Hot corrosion resistant single crystal nickel-based superalloys
AssigneeSPS Technologies, Inc.
InventorGary L. Erickson
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AssigneeSPS Technologies, Inc.
InventorGary L. Erickson
Estimating the term…
This invention relates to a hot corrosion resistant nickel-based superalloy comprising the following elements in percent by weight: from about 11.5 to about 13.5 percent chromium, from about 5.5 to about 8.5 percent cobalt, from about 0.40 to about 0.55 percent molybdenum, from about 4.5 to about 5.5 percent tungsten, from about 4.5 to about 5.8 percent tantalum, from about 0.05 to about 0.25 percent columbium, from about 3.4 to about 3.8 percent aluminum, from about 4.0 to about 4.4 percent titanium, from about 0.01 to about 0.06 percent hafnium, and the balance nickel plus incidental impurities, the superalloy having a phasial stability number N.sub.V3B less than about 2.45. Single crystal articles can be suitably made from the superalloy of this invention. The article can be a component for a gas turbine engine and, more particularly, the component can be a gas turbine blade or gas turbine vane.
A hot corrosion resistant nickel-based superalloy comprising the following elements in percent by weight:
A single crystal casting characterized by an increased resistance to hot corrosion, said casting being made from a nickel-based superalloy comprising the following elements in percent by weight:
A single crystal casting characterized by an increased resistance to hot corrosion, said casting being made from a nickel-based superalloy comprising the following elements in percent by weight:
Dependencies are inferred from the claim text.