Powder-metallurgic method for producing highly dense shaped parts
US7390456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2002 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Sep 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Highly dense shaped parts are produced with a powder metallurgic process. The parts are formed of an alloy that, besides of at least 20 weight % chromium, consists of iron and one or several additional alloy portions that in sum do not amount to more than 10 weight %. The part is produced by pressing and sintering to near final shape a ready-to-press powder where the additional alloy portions are introduced in form of a master-alloy powder. The master-alloy may contain the following variations: the additional alloy portions and the iron portions; or the additional alloy portions, the iron parts, and the chromium portions; or additional alloy portions and the chromium portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.