Process for manufacturing single-crystal seeds simultaneously with the casting of single-crystal parts
US7779889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | May 29, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/52
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for manufacturing at least one single-crystal seed that can be used as a starter seed in the manufacture of a single-crystal high-pressure turbine nozzle, with at least one vane between two platforms, by metal casting, is disclosed. The process includes producing a wax pattern that includes a pattern for the nozzle, a pattern for the starter seed, and a pattern for a crude seed; forming a ceramic shell mold from the wax pattern; incorporating a starter seed into the mold; pouring metal into the mold; directionally solidifying the metal in the mold from the starter seed; and separating the crude seed from the nozzle. The starter seed and the crude seed each include a flat face for localizing the crystalline orientations. The crude seed has the same crystallographic structure as the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.