Title:
METHOD FOR PRODUCING Fe-BASED NANOCRYSTALLINE ALLOY MAGNETIC CORE AND Fe-BASED NANOCRYSTALLINE ALLOY MAGNETIC CORE
Document Type and Number:
WIPO Patent Application WO/2023/033059
Kind Code:
A1
Abstract:
The present invention is a method for producing an Fe-based nanocrystalline alloy magnetic core, said method including an oxide film forming step for heat-treating, in an oxidizing atmosphere, a magnetic core material in which a nanocrystallizable Fe-based alloy ribbon is wound, and a nanocrystallization step for carrying out nanocrystallization of the nanocrystallizable Fe-based alloy by heat-treating, in a non-oxidizing atmosphere, the magnetic core material after the oxide film forming step, wherein a maximum temperature of the heat treatment in the oxide film forming step is a temperature lower than the crystallization start temperature of the nanocrystallizable Fe-based alloy, and a maximum temperature of the heat treatment in the nanocrystallization step is a temperature greater than or equal to the crystallization start temperature of the nanocrystallizable Fe-based alloy.
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Inventors:
OIKAWA MICHIKO (JP)
SHIRASE SHIGEKI (JP)
TSUBOI RYO (JP)
SHIRASE SHIGEKI (JP)
TSUBOI RYO (JP)
Application Number:
PCT/JP2022/032815
Publication Date:
March 09, 2023
Filing Date:
August 31, 2022
Export Citation:
Assignee:
NIPPON CHEMICON (JP)
International Classes:
H01F41/02; C21D6/00; C21D9/00; C22C38/00; C22C45/02; H01F1/153
Domestic Patent References:
| WO2019181107A1 | 2019-09-26 |
Foreign References:
| JP2016197720A | 2016-11-24 | |||
| JP2010189761A | 2010-09-02 | |||
| JP2011149045A | 2011-08-04 | |||
| JPH02236259A | 1990-09-19 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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