Nickel based forged alloy, gas turbine member using said alloy and gas turbine using said member
US8864919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Dec 30, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2220/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
It is an objective of the invention to provide a Ni-based forged alloy having good large ingot formability and good hot formability as well as high mechanical strength at high temperature. There is provided a Ni-based forged alloy comprising: 0.001 to 0.1 mass % of C; 0.001 to 0.01 mass % of B; 16 to 22 mass % of Cr; 0.5 to 1.5 mass % of Al; 0.1 to 6.0 mass % of W; 3.5 to 5.5 mass % of Nb; 0.8 to 3.0 mass % of Ti; 16 to 20 mass % of Fe; 2.0 mass % or less of Mo; and the balance including Ni and unavoidable impurities, in which: a segregation parameter Ps defined by a formula of “Ps (mass %) =1.05×[Al concentration (mass %)]+0.6×[Ti concentration (mass %)]−0.8×[Nb concentration (mass %)]−0.3×[Mo concentration (mass %)]” satisfies a relationship of “Ps≧−3.0 mass %”; and a total amount of W and Mo is 1.75 atomic % or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.