Methods for manufacturing investment casting shells
US6951239B1 · kind B1 · utility
14Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2004 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Apr 15, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C9/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essentially non-oxidizing conditions at a higher temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.