NICKEL BASE SUPERALLOYS AND TURBINE COMPONENTS FABRICATED THEREFROM

摘要

A nickel base superalloy suitable for the production of a large, crack-free nickel-base superalloy gas turbine bucket suitable for use in a large land-based utility gas turbine engine, 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 3.0 to 12.0; Molybdenum 1.0 to 5.0; Boron 0.0080 to 0.01; 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.