Method for preparing a nickel-base superalloy article using...

Details Method for preparing a nickel-base superalloy article using... Method for preparing a nickel-base superalloy article using...

2006-04-25

2006-04-25

Sheehan, John P (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S675000

Reexamination Certificate

active

07033448

ABSTRACT:
An article made of a nickel-base superalloy strengthened by the presence of a gamma-prime phase is prepared by solution heat treating the nickel-base superalloy at a solutionizing temperature above a gamma-prime solvus temperature of the nickel-base superalloy, thereafter first quenching the nickel-base superalloy in a first molten salt bath maintained at a temperature of from the gamma-prime solvus temperature to about 100° F. below the gamma-prime solvus temperature, thereafter second quenching the nickel-base superalloy in a second molten salt bath maintained at a temperature below an aging temperature of the nickel-base superalloy, and thereafter precipitation heat treating the nickel-base superalloy at the aging temperature to precipitate an aged microstructure having gamma prime phase in a nickel-base matrix.

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ASM Handbook, vol. 4, Heat Treating, 1991, pp. 475-483.

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