Title:
The end of soft magnetism mixed powder
Document Type and Number:
Japanese Patent JP6088284
Kind Code:
B2
Abstract:
Provided is soft magnetic powder used to manufacture a dust core having good mechanical strength and superior formability while iron loss is reduced. The soft magnetic powder for dust cores according to the invention is soft magnetic mixed powder that includes pure iron powder and soft magnetic iron-base alloy powder, wherein the proportion of the soft magnetic iron-base alloy powder in the mixture is 5 to 60 mass %, the ratio of the modes of the particle size distributions of the soft magnetic iron-base alloy powder and the pure iron powder ((the mode of the particle size distribution of the soft magnetic iron-base alloy powder)/(the mode of the particle size distribution of the pure iron powder)) is 0.9 or more and less than 5, and the ratio Rover/Runder is 1.2 or more, where Rover is the mass proportion of soft magnetic iron-base alloy powder in mixed powder with a particle size of D50 or more based on the mass fraction, and Runder is the mass proportion of soft magnetic iron-base alloy powder in mixed powder with a particle size of less than D50 based on the mass fraction.
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Inventors:
Takeo Miyamura
Hiroyuki Mitani
Hiroyuki Mitani
Application Number:
JP2013032625A
Publication Date:
March 01, 2017
Filing Date:
February 21, 2013
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
H01F1/24; B22F1/052; B22F1/102; B22F1/16; B22F3/00; C22C38/00; B22F1/08
Domestic Patent References:
| JP2000114022A | ||||
| JP8236331A | ||||
| JP2007012745A |
Foreign References:
| WO2012128037A1 | ||||
| WO2011010561A1 |
Attorney, Agent or Firm:
Kyuichi Ueki
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito
Yukari Shibata
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito
Yukari Shibata