Patent ID: 11401582

Abstract:
An objective of the invention is to provide a Ni-based forged alloy article based on a superhigh precipitation-strengthening Ni-based alloy material that has mechanical properties balanced at higher level than before, and a turbine high-temperature member formed of the forged alloy article. There is provided a Ni-based forged alloy article comprising crystal grains of the γ phase and precipitation particles of the γ′ phase, and having a chemical composition enabling to precipitate a γ′ phase in an amount of 50-70 volume % at 700° C. within a matrix of a γ phase. The γ′ phase comprises: aging precipitation γ′ phase particles precipitating within the γ phase grains; and eutectic reaction γ′ phase particles precipitating between/among the γ phase grains. The eutectic reaction γ′ phase particles comprise a higher content of Ni and Al than the aging precipitation γ′ phase particles and have an average particle size of 2 to 40 μm.