Title:
METHOD FOR PRODUCING Fe-BASED NANOCRYSTAL ALLOY POWDER AND Fe-BASED AMORPHOUS ALLOY
Document Type and Number:
Japanese Patent JP2022031111
Kind Code:
A
Abstract:
To provide a method for producing Fe-based nanocrystal alloy powder capable of obtaining satisfactory magnetic properties by suppressing the coarsening of crystal grains and the precipitation of Fe2B crystals while generating bcc-Fe(Si) fine crystals.SOLUTION: A method for producing Fe-based nanocrystal alloy powder has a process in which Fe-based amorphous alloy powder is heat-treated under the conditions that the average temperature rising speed from 300°C to 400°C upon the temperature rising of Fe-based amorphous alloy powder is defined as TA and the average temperature rising speed from 400°C to the maximum temperature is defined as TB, TA is 2 to 10°C/min, TB is 1.5 to 8°C/min and also TA>TB.SELECTED DRAWING: Figure 1
Inventors:
CHIWATA NOBUHIKO
OTA MOTOKI
YAMAMOTO SHINJI
OTA MOTOKI
YAMAMOTO SHINJI
Application Number:
JP2021048151A
Publication Date:
February 18, 2022
Filing Date:
March 23, 2021
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
B22F1/00; C22C38/00; C22C45/02; H01F1/153
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