The manufacturing method of a powder-compacting soft magnetism object and a powder-compacting magnetic body, and a motor - Hitachi Industrial Equipment Systems Co., Ltd.

Title:

The manufacturing method of a powder-compacting soft magnetism object and a powder-compacting magnetic body, and a motor

Document Type and Number:

Japanese Patent JP5916392

Kind Code:

B2

Abstract:

Provided is a compressed soft magnetic powder body which does not suffer from an increase in iron loss and which exhibits excellent magnetic characteristics. A compressed soft magnetic powder body produced by applying insulating coatings to the surfaces of metal powder particles which comprise iron powder particles as the main component and then compression-molding the resulting metal powder particles, wherein an oxidation -affected layer that contains iron oxides (11, 12, 13) and a layer-shaped Si oxide (14) is present in each iron-particle interface (10) which is the boundary between iron powder particles, said oxidation-affected layer being formed by heat treatment conducted in an oxidizing atmosphere after the compression molding.

Inventors:

Kazuya Nishi
Yasuhisa Aono
Kenichi Soma
Takao Imagawa
Keifumi Hojo
Kamijo Tomotsuna
Takeshi Owaki
Hiroyuki Mitani

Application Number:

JP2012006996A

Publication Date:

May 11, 2016

Filing Date:

January 17, 2012

Export Citation:

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Assignee:

Hitachi Industrial Equipment Systems Co., Ltd.
KABUSHIKI KAISHA KOBE SEIKO SHO

International Classes:

H01F1/24; B22F1/102; B22F1/16; B22F3/00; B22F3/24; H01F27/255

Domestic Patent References:

JP2011233827A

Foreign References:

WO2008032503A1
WO2006006545A1
WO2009078453A1

Attorney, Agent or Firm:

Polaire Patent Business Corporation

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