nickel-base superalloy having improved degradation behavior

摘要

PROBLEM TO BE SOLVED: To provide a nickel-base superalloy having improved degradation behavior, thus, in which, e.g., successively to a mechanical load performed for a long time at room temperature successively to high temperature, (residual) stress/hardness as high as possible is present.;SOLUTION: The nickel-base superalloy consists essentially of the following chemical composition (details in% by mass): 7.7 to 8.3 Cr, 5.0 to 5.25 Co, 2.0 to 2.1 Mo, 7.8 to 8.3 W, 5.8 to 6.l% Ta, 4.9 to 5.1 Al, 1.3 to 1.4 Ti, 0.1 to 0.6% Pt, 0.1 to 0.5% Nb, 0.11 to 0.15% Si, 0.11 to 0.15% Hf, 200 to 750 ppm C, 50 to 400 ppm B, and the remainder nickel and production-related impurities.;COPYRIGHT: (C)2011,JPO&INPIT