Fe/Cr/Co Permanent magnetic alloys and method of production thereof
US4194932A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1978 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Feb 7, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Fe/Cr/Co alloys of this invention which are provided with both a good workability and maximum energy product of 2.0 MGOe or more, consist of 17 to 45% by weight of chromium, 3 to 14.9% by weight of cobalt and the remainder being essentially of iron, which also attribute to the method of producing improved Fe/Cr/Co permanent alloy products usable with good efficiency on an industrial scale and make the best possible use of the advantageous characteristics particular to the component compositions of the alloys. This method contains the aging in a magnetic field and preferably comprises at least the step of aging in a magnetic field the alloy material in a predetermined temperature range and the secondary aging treatment step of cooling continuously and gradually the alloy material through a predetermined temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.