High-temperature-resistant cobalt-base superalloy
AssigneeALSTOM Technology Ltd
InventorsMohamed Nazmy, Andreas Künzler, Markus Staubli
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Abstract
A cobalt-base superalloy chemical composition is disclosed which includes, in % by weight: 25-28 W; 3-8 Al; 0.5-6 Ta; 0-3 Mo; 0.01-0.2 C; 0.01-0.1 Hf; 0.001-0.05 B; 0.01-0.1 Si; and remainder Co and unavoidable impurities. This superalloy can be strengthened by γ′ dispersions and further dispersion mechanisms. Exemplary compositions can provide good oxidation properties and improved strength values at high temperatures.
Claims24
A cobalt-base superalloy chemical composition comprising:
- 25-28% by weight W;
- 3-8% by weight Al;
- 0.5-6% by weight Ta;
- 0-3% by weight Mo;
- 0.01-0.2% by weight C;
- 0.01-0.1% by weight Hf;
- 0.001-0.05% by weight B;
- 0.01-0.1% by weight Si;
- and
- remainder Co and unavoidable impurities.
A gas turbine component containing a cobalt-base superalloy chemical composition comprising:
- 25-28% by weight W;
- 3-8% by weight Al;
- 0.5-6% by weight Ta;
- 0-3% by weight Mo;
- 0.01-0.2% by weight C;
- 0.01-0.1% by weight Hf;
- 0.001-0.05% by weight B;
- 0.01-0.1% by weight Si;
- and
- remainder Co and unavoidable impurities.
A cobalt-base superalloy chemical composition consisting of:
- 25-28% by weight W;
- 3-8% by weight Al;
- 0.5-6% by weight Ta;
- 0-3% by weight Mo;
- 0.01-0.2% by weight C;
- 0.01-0.1% by weight Hf;
- 0.001-0.05% by weight B;
- 0.01-0.1% by weight Si;
- and
- remainder Co and unavoidable impurities.
Dependencies are inferred from the claim text.