Ni-based forged alloy article and turbine high-temperature member using same
US11401582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Oct 25, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D5/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.