Precipitation hardenable cobalt-nickel base superalloy and article made therefrom
US11718897B2 · kind B2 · utility
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Key dates
| Filing date | Apr 6, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Sep 5, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition. The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of Al2O3 and Cr2O3 that protects the alloy from oxidation at the elevated operating temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.