| 摘要 |
PROBLEM TO BE SOLVED: To provide an Ni based single crystal superalloy which has improved strength by preventing the precipitation of a TCP phase at high temperatures. SOLUTION: The Ni based single crystal superalloy has a composition containing, by weight, 5.0 to 7.0% Al, 4.0 to 8.0% Ta, 2.9 to 4.5% Mo, 4.0 to 8.0% W, 3.0 to 6.0% Re, 0.01 to 0.50% Hf, 2.0 to 5.0% Cr, 0.1 to 15.0% Co and 1.0 to 4.0% Ru, and the balance Ni with inevitable impurities.
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