Method of making a dual alloy article
US5273708A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jun 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In making a dual alloy gas turbine rotor, a plurality of superalloy components are formed to include an airfoil having a directionally solidified columnar grain structure or a single crystal grain structure. A boron-bearing melting point depressant material is applied to the inner surface and a side surface of the components. The components are arranged side-by-side in an annular array with the first side surface of one component juxtaposed to the second side surface of an adjacent component and with the inner surfaces defining a spray-receiving surface. The airfoils extend in a radial axis or direction of the array while the spray-receiving surface extends in a circumferential direction of the article. A sealing member is positioned adjacent an axial end of the array of the components to close off that end and form a spray-receiving cavity. Boron-bearing melting point depressant material is provided between the sealing member and the end of the array. The array/sealing member is heated to form an exposed liquid layer on the spray-receiving surface at the onset of plasma spraying of a molten metal and also to form a fusion joint between the juxtaposed first and second surfaces of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.