Title:
METHOD FOR MANUFACTURING Fe-Co-BASED COATED ALLOY SUBSTRATE, Fe-Co-BASED COATED ALLOY SUBSTRATE, AND LAMINATED CORE MEMBER
Document Type and Number:
WIPO Patent Application WO/2024/042826
Kind Code:
A1
Abstract:
Provided are: a method for manufacturing an Fe-Co-based alloy substrate equipped with a surface film having high electrical insulation properties on the substrate surface, the method maintaining workability of the Fe-Co-based alloy substrate; an Fe-Co-based alloy substrate; and a laminated core member. The method for manufacturing an Fe-Co-based alloy substrate comprises: a step for coating a surface of an Fe-Co-based alloy substrate with a magnesium hydroxide solution to form a liquid film; and a heat treatment step for heat treating the coated substrate at a temperature of 300-480°C with a heating retention time set so as to satisfy the conditional expression "T × H/1000 ≤ 12.5" (where T is the heating retention time [min] and H is the heating temperature [°C]), and forming a film of magnesium oxide having a thickness of 0.4-2.0 µm on the surface of the Fe-Co-based alloy substrate.
Inventors:
FUJIHARA YOSHIYUKI (JP)
Application Number:
PCT/JP2023/022394
Publication Date:
February 29, 2024
Filing Date:
June 16, 2023
Export Citation:
Assignee:
PROTERIAL LTD (JP)
International Classes:
C22C19/07; C22C38/00; C23C26/00; H01F1/153; H01F1/18
Foreign References:
| JP2007013069A | 2007-01-18 | |||
| JP2020017741A | 2020-01-30 |
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