Ni-based single crystal superalloy and turbine blade...

Details Ni-based single crystal superalloy and turbine blade... Ni-based single crystal superalloy and turbine blade...

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) F01D 5/28 (2006.01) F02C 7/00 (2006.01)

Patent

CA 2758867

A Ni-based single crystal superalloy which has the following composition: Co: 0.0 wt% or more to 15.0 wt% or less, Cr: 4.1 to 8.0 wt%, Mo: 2.1 to 4.5 wt%, W: 0.0 to 3.9 wt%, Ta: 4.0 to 10.0 wt%, Al: 4.5 to 6.5 wt%, Ti: 0.0 to 1.0 wt%, Hf: 0.00 to 0.5 wt%, Nb: 0.0 to 3.0 wt%, Re: 8.1 to 9.9 wt% and Ru: 0.5 to 6.5 wt% with the remainder including Ni and unavoidable impurities. As a result, the Ni-based single crystal superalloy which includes more than 8 wt% of Re in the composition ratio and has excellent specific creep strength and the turbine blade incorporating the Ni-based single crystal superalloy may be made.

L'invention concerne un superalliage monocristallin à base de nickel comprenant plus de 8 % de rhénium en masse et ayant une résistance au fluage relative excellente. L'invention concerne également une pale de turbine utilisant ledit superalliage. Le superalliage a une composition comprenant, en masse, avec pourcentages inclus : 0,0 % à 15,0 % de cobalt, 4,1 % à 8,0 % de chrome, 2,1 % à 4,5 % de molybdène, 0,0 % à 3,9 % de tungstène, 4,0 % à 10,0 % de tantale, 4,5 % à 6,5 % d'aluminium, 0,0 % à 1,0 % de titane, 0,00 % à 0,5 % d'hafnium, 0,0 % à 3,0 % de niobium, 8,1 % à 9,9 % de rhénium et 0,5 % à 6,5 % de ruthénium. Le reste est constitué par du nickel et les inévitables impuretés.

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