| 摘要 |
Disclosed herein is a nickel-based heat-resistant superalloy produced by a casting and forging method, the nickel-based heat-resistant superalloy comprising 2.0 mass% or more but 25 mass% or less of chromium, 0.2 mass% or more but 7.0 mass% or less of aluminum, 19.5 mass% or more but 55.0 mass% or less of cobalt, [0.17 x (mass% of cobalt content - 23) + 3] mass% or more but [0.17 x (mass% of cobalt content - 20) + 7] mass% or less and 5.1 mass% or more of titanium, and the balance being nickel and inevitable impurities, and being subjected to solution heat treatment at 93% or more but less than 100% of a ³' solvus temperature. |
