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Title:
POWDER MAGNETIC CORE AND IRON-BASE POWDER FOR POWDER MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2008/032707
Kind Code:
A1
Abstract:
This invention relates to an iron-base powder for a power magnetic core. In the iron-base powder for a powder magnetic core, when a crystal grain size distribution including at least the maximum crystal grain diameter is determined by observing at least 50 ion-base powder cross sections to measure the crystal grain diameter for each ion-base powder, not less than 70% of the measured crystal grains are accounted for by crystal grains having a crystal grain diameter of not less than 50 μm. According to the iron-base powder, the magnetic coercive force of the powder magnetic core is reduced, and the hysteresis loss can be reduced.

Inventors:
MITANI, Hiroyuki (())
三谷 宏幸 (())
AKAGI, Nobuaki (())
赤城 宣明 (())
HOUJOU, Hirofumi (())
北条 啓文 (())
ISHIHARA, Chio (())
Application Number:
JP2007/067660
Publication Date:
March 20, 2008
Filing Date:
September 11, 2007
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (10-26, Wakinohama-cho 2-chome Chuo-ku, Kobe-sh, Hyogo 85, 6518585, JP)
株式会社神戸製鋼所 (〒85 兵庫県神戸市中央区脇浜町二丁目10番26号 Hyogo, 6518585, JP)
HITACHI POWDERED METALS CO., LTD. (2-1 Minoridai 5-chome, Matsudo-shi Chiba, 95, 2702295, JP)
HITACHI POWDERED METALS CO., LTD. (2702295, JP)
MITANI, Hiroyuki (())
三谷 宏幸 (())
AKAGI, Nobuaki (())
赤城 宣明 (())
HOUJOU, Hirofumi (())
International Classes:
B22F1/00; B22F1/02; B22F3/00; H01F1/20; H01F1/24
Attorney, Agent or Firm:
OGURI, Shohei et al. (Eikoh Patent Office, 7-13 Nishi-Shimbashi 1-chom, Minato-ku Tokyo 03, 1050003, JP)
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