Title:
METHOD FOR PRODUCING Fe-BASED NANO-CRYSTAL ALLOY, AND METHOD FOR PRODUCING Fe-BASED NANO-CRYSTAL ALLOY MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2015/046140
Kind Code:
A1
Abstract:
A method for producing a Fe-based nano-crystal alloy ribbon involves a heat treatment step of heating a Fe-based amorphous alloy ribbon that can be transformed into nano-crystals to a temperature falling within a crystallization temperature range and then cooling the heated alloy ribbon. In the heat treatment step, a magnetic field is applied to the alloy ribbon in the width direction at a temperature falling within a temperature range in which the temperature is raised and which includes at least a part of a temperature range lying between a temperature lower by 50˚C than a crystallization initiation temperature for a differential scanning calorimeter and a temperature higher by 20˚C than the crystallization initiation temperature and does not exceed a temperature higher by 50˚C than the crystallization initiation temperature.
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Inventors:
YAMAMOTO HIROKI
MORITSUGU NAKAO
MORITSUGU NAKAO
Application Number:
PCT/JP2014/075070
Publication Date:
April 02, 2015
Filing Date:
September 22, 2014
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
C21D6/00; H01F1/153; H01F41/02; C22C38/00; C22C45/02
Foreign References:
| JPS6479342A | 1989-03-24 | |||
| JP2005187917A | 2005-07-14 | |||
| JPH04275411A | 1992-10-01 | |||
| JP2001220656A | 2001-08-14 | |||
| JPH07278764A | 1995-10-24 | |||
| JPH05202452A | 1993-08-10 | |||
| JPH0277105A | 1990-03-16 | |||
| JPH044393A | 1992-01-08 | |||
| JPH07278764A | 1995-10-24 |
Other References:
See also references of EP 3050977A4
Attorney, Agent or Firm:
OKUDA SEIJI (JP)
Seiji Okuda (JP)
Seiji Okuda (JP)
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