| 发明名称 | Iron powder for powder magnetic core and process for producing powder magnetic core | ||
| 摘要 | 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%. | ||
| 申请公布号 | US9583261(B2) | 申请公布日期 | 2017.02.28 |
| 申请号 | US201314419402 | 申请日期 | 2013.08.26 |
| 申请人 | Kobe Steel, Ltd. | 发明人 | Mitani Hiroyuki;Miyamura Takeo;Hojo Hirofumi;Kamijo Tomotsuna |
| 分类号 | B22F3/02;H01F41/02;H01F1/24;B22F1/02;H01F1/147;H01F1/20;H01F1/22;B22F5/00 | 主分类号 | B22F3/02 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A method for producing a powder magnetic core, the method comprising: compacting a soft magnetic powder that comprises 95% by mass or more of soft magnetic powder particles that pass through a sieve having an opening of 75 μm based on the total amount of the soft magnetic powder, and 40% by mass or more of soft magnetic powder particles based on the total amount of the soft magnetic powder do not pass through a sieve having an opening of 45 μm, wherein the soft magnetic powder has a mean strain of less than 0.100%. | ||
| 地址 | Kobe-shi JP | ||