| 摘要 |
PROBLEM TO BE SOLVED: To provide a single crystal Ni-based superalloy which has high creep fracture strength at a high temperature, and is further excellent in oxidation resistance and corrosion resistance at a high temperature. SOLUTION: The single crystal Ni-based superalloy having excellent strength, corrosion resistance and oxidation resistance has a composition comprising, by weight, 3.0 to 7.0% Cr, 9.5 to 15.0% Co, 4.5 to 8.0% W, 3.3 to 6.0% Re, 4.0 to 8.0% Ta, 0.8 to 2.0% Ti, 4.5 to 6.5% Al, 0.01 to 0.2% Hf, <0.5% Mo,≤0.01% C,≤0.005% B,≤0.01% Zr,≤0.005% O and≤0.005% N, and the balance substantially Ni. COPYRIGHT: (C)2005,JPO&NCIPI
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