SINGLE CRYSTAL NICKEL-BASE SUPERALLOY EXCELLENT IN CREEP CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To provide a single crystal nickel-base superalloy excellent in not only high-temperature characteristics, in particular, a creep life, but also resistance against creep deformation by adjusting the amount of relatively inexpensive alloy elements while minimizing the addition of expensive other alloy elements.;SOLUTION: The nickel-based superalloy includes, by wt.%, 11.5-13.5% Co, 3.0-5.0% Cr, 0.7-2.0% Mo, 8.5-10.5% W, 4.5-6.5% Al, 0.5-2.0% Ti, 6.0-8.0% Ta, 2.0-4.0% Re, 0.1-2.0% Ru, and the rest Ni and other inevitable impurities. In addition, the nickel-base superalloy has a mixed structure of a γ matrix and a γ' precipitate.;COPYRIGHT: (C)2012,JPO&INPIT