Ni-based single crystal superalloy
The Ni-based single crystal alloy disclosed here is a single crystal and has a chemical composition containing, as % by mass, Co: 8 to 12%, Cr: 5 to 7.5%, Mo: 0.2 to 1.2%, W: 5 to 7%, Al: 5 to 6.5%, Ta: 8 to 12%. Hf: 0.01 to 0.2%, Re: 2 to 4%, Si: 0.005 to 0.1%, with the balance of Ni and inevitable impurities.
1. An Ni-based single crystal superalloy, which is a single crystal and has a chemical composition consisting of, as % by mass,
Co: 8 to 11%,
Cr: 5 to 7%,
Mo: 0.2 to 1%,
W: 5.5 to 7%,
Al: 5 to 6%,
Ta: 9 to 12%,
Hf: 0.05 to 0.2%,
Re: 2.5 to 4%,
Ru: 0%,
Ti: 0%
Si: 0.005 to 0.08%,
with a balance of Ni and inevitable impurities.
2. The Ni-based single crystal superalloy as claimed in claim 1 , which is a single crystal and has a chemical composition consisting of, as % by mass,
Co: 8 to 10%,
Cr: 6 to 7%,
Mo: 0.5 to 1%,
W: 5.5 to 6.5%,
Al: 5 to 6%,
Ta: 9 to 11%,
Hf: 0.05 to 0.15%,
Re: 2.5 to 3.5%,
Ru: 0%,
Ti: 0%
Si: 0.005 to 0.08%,
with a balance of Ni and inevitable impurities.