| 摘要 |
PROBLEM TO BE SOLVED: To provide a nickel based superalloy used for producing the fixed and movable single crystal blades of an industrial gas turbine by directional solidification. SOLUTION: The nickel based superalloy suitable for single crystal solidification has a composition containing, by mass, 4.75 to 5.25% Co, 11.5 to 12.5% Cr, 0.8 to 1.2% Mo, 3.75 to 4.25% W, 3.75 to 4.25% Al, 4 to 4.8% Ti, 1.75 to 2.25% Ta, 0.006 to 0.04% C, <=0.01% B, <=0.01% Zr, <=1% Hf and <=1% Nb, and the balance Ni with impurities.
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