Nickel-base single-crystal superalloys, method for manufacturing

Details Nickel-base single-crystal superalloys, method for manufacturing Nickel-base single-crystal superalloys, method for manufacturing

1999-03-03

2000-12-12

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

148675, 148428, 420448, C22F 110

Patent

active

061593141

ABSTRACT:
The invention relates to a nickel-base single-crystal superalloy applied to parts for industrial gas turbine or the like such as turbine rotor blade and stator blade which are used at high temperatures, a method for manufacturing the same, and gas turbine parts prepared from such nickel-base single-crystal superalloys, and more particularly the invention provides a nickel-base single-crystal superalloy consisting essentially of, in percentages by weight, 5% to 10% cobalt, 4.7% to 6% chromium, more than 2.0% to less than 3.5% molybdenum, 7.5% to 10% tungsten, 5% to 6% aluminum, 0.1% to 2% titanium, 4% to 5.5% tantalum, 1% to 4% rhenium, 0.01% to 0.2% hafnium, the balance being nickel and incidental impurities, which is excellent in high-temperature strength and high-temperature corrosion resistance, and further excellent in structural stability even in a long time use.

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patent: 5240518 (1993-08-01), Wortman et al.
patent: 5660649 (1997-08-01), Bornstein et al.
patent: 5820700 (1998-10-01), DeLuca

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