The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2012
Filed:
Sep. 11, 2007
Hiroyuki Mitani, Kobe, JP;
Nobuaki Akagi, Takasago, JP;
Hirofumi Houjou, Takasago, JP;
Chio Ishihara, Matsudo, JP;
Makoto Iwakiri, Matsudo, JP;
Sohei Yamada, Kosai, JP;
Yasukuni Mochimizo, Kosai, JP;
Hiroyuki Mitani, Kobe, JP;
Nobuaki Akagi, Takasago, JP;
Hirofumi Houjou, Takasago, JP;
Chio Ishihara, Matsudo, JP;
Makoto Iwakiri, Matsudo, JP;
Sohei Yamada, Kosai, JP;
Yasukuni Mochimizo, Kosai, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Hitachi Powdered Metals Co., Ltd., Matsudo-shi, JP;
Abstract
The present invention relates to an iron-base powder for a powder core, wherein when cross-sections of at least 50 iron-base powders are observed and a crystal grain size distribution containing at least a maximum crystal grain size is determined by measuring a crystal grain size of each iron-base powder, 70% or more of the measured crystal grains are a crystal grain having a crystal grain size of 50 μm or more. According to the iron-base powder of the invention, a coercivity of the powder core can be made small and a hysteresis loss can be reduced.