Alloy
AssigneeROLLS-ROYCE plc
InventorsMark C Hardy, David Dye, Lucy Reynolds, Thomas McAuliffe, Ioannis Bantounas
Life of this patent
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Abstract
A nickel-cobalt based superalloy composition consisting of by weight (wt.): 33.5 to 54 percent Ni; 19.5 to 36 percent Co; 9 to 12 percent Cr; 3.9 to 5.5 percent Al; 4.5 to 9.5 percent W; up to 5.5 percent Fe; 2 to 3.5 percent Mo; 0.6 to 5 percent Ta; 0.15 to 2.2 percent Ti; up to 1.75 percent Nb; up to 0.1 percent Hf; 0.005 to 0.03 percent C; 0.001 to 0.02 percent B; 0.005 to 0.06 percent Zr; up to 0.3 percent Si; up to 0.6 percent Mn; and the balance being impurities.
Claims21
A nickel-cobalt based superalloy composition consisting of, by weight:
- 33.5 to 54 percent nickel;
- 19.5 to 36 percent cobalt;
- 9.0 to 12.0 percent chromium;
- 3.9 to 5.5 percent aluminium;
- 5.39 to 9.5 percent tungsten;
- up to 5.5 percent iron;
- 2 to 3.5 percent molybdenum;
- 0.6 to 5 percent tantalum;
- 0.15 to 2.2 percent titanium;
- up to 1.75 percent niobium;
- up to 0.1 percent hafnium;
- 0.005 to 0.03 percent carbon;
- 0.001 to 0.02 percent boron;
- 0.005 to 0.06 percent zirconium;
- up to 0.3 percent silicon;
- up to 0.6 percent manganese;
- and
- the balance being impurities.
A nickel-cobalt based superalloy composition consisting of, by weight:
- 33.5 to 54 percent nickel;
- 19.5 to 36 percent cobalt;
- 9.0 to 12.0 percent chromium;
- 3.9 to 5.5 percent aluminium;
- 4.5 to 9.5 percent tungsten;
- up to 5.5 percent iron;
- 2 to 3.5 percent molybdenum;
- 0.6 to 3.4 percent tantalum;
- 0.15 to 2.2 percent titanium;
- up to 1.75 percent niobium;
- up to 0.1 percent hafnium;
- 0.005 to 0.03 percent carbon;
- 0.001 to 0.02 percent boron;
- 0.005 to 0.06 percent zirconium;
- up to 0.3 percent silicon;
- up to 0.6 percent manganese;
- and
- the balance being impurities.
A nickel-cobalt based superalloy composition consisting of, by weight:
- 33.5 to 54 percent nickel;
- 19.5 to 36 percent cobalt;
- 9.0 to 12.0 percent chromium;
- 3.9 to 5.5 percent aluminium;
- 4.5 to 9.5 percent tungsten;
- up to 5.5 percent iron;
- 2 to 3.5 percent molybdenum;
- 0.6 to 3.80 percent tantalum;
- 0.15 to 2.2 percent titanium;
- up to 1.75 percent niobium;
- up to 0.1 percent hafnium;
- 0.005 to 0.03 percent carbon;
- 0.001 to 0.02 percent boron;
- 0.005 to 0.06 percent zirconium;
- up to 0.3 percent silicon;
- up to 0.6 percent manganese;
- and
- the balance being impurities,
- wherein the nickel-cobalt based superalloy has a bimodal size distribution of γ′ precipitates that includes:
- secondary γ′ precipitates that are between 50 and 200 nm in size, and
- tertiary γ′ precipitates that are less than 35 nm in size.
Dependencies are inferred from the claim text.