Patent ID: 6908518

Claim:
A method of making a cast and heat treated article of a nickel-base superalloy, comprising the steps of: a) providing a superalloy, comprising, by weight percents: Chromium 7.0 to 12.0 Carbon 0.06 to 0.10 Cobalt 5.0 to 15.0 Titanium 3.0 to 5.0 Aluminum 3.0 to 5.0 Tungsten 30 to 12.0 Molybdenum 1.0 to 5.0 Boron 0.0080 to 0.0130 Rhenium 0 to 10.0 Tantalum 2.0 to 6.0 Columbium 0 to 2.0 Vanadium 0 to 3.0 Hafnium 0 to 2.0 and remainder nickel and incidental impurities; (b) heating the superalloy to develop at least 60 percent solutioning of gamma prime precipitate; and (c) cooling to room temperature wherein the article is cooled by a furnace cool at a rate of about 35° F./minute to about 2050° F.