Method for producing aperture-containing powder-metallurgy article
US3992202A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1974 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Oct 11, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Method for producing a powder-metallurgy article having at least one aperture therein; the article is produced by providing a dense, nondeformable core having a configuration corresponding to the desired configuration of the aperture in said article; the core is placed in a particle charge having a composition corresponding to that desired in the article; the position of the core within the particle charge corresponds to the desired position of the aperture within the final compacted product. The core has a coefficient of thermal expansion greater than that of said article, whereby after compacting removal of the core from the article to create the aperture is facilitated. A separating medium may be used between the core and the powder. The asembly constituting the container, core and powder is hot isostatically compacted, and upon cooling the container and core are removed from the densified article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.