Iron powder for powder magnetic core and process for producing powder magnetic core
US9583261B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Aug 26, 2013 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Sep 29, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A powder magnetic core which exhibits a high compact density and a reduced iron loss can be obtained by compacting a soft magnetic powder in which the mass ratio of soft magnetic powder particles that pass through a filter having an opening of 75 μm is 95 mass % or higher relative to the whole amount of the soft magnetic powder and which has a mean strain of less than 0.100%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.