Title:
SOFT MAGNETIC METAL POWDER, PRODUCTION METHOD THEREOF AND SOFT MAGNETIC METAL DUST CORE
Document Type and Number:
Japanese Patent JP2019090103
Kind Code:
A
Abstract:
To provide a soft magnetic metal powder having a small coercive force, a high circularity and a reduced amount of fine powder, to provide a production method thereof and to provide a soft magnetic metal dust core using the soft magnetic metal powder.SOLUTION: The production method of a soft magnetic metal powder has: a raw material powder preparation step of preparing a metal raw material powder having a plurality of metal raw material particles including iron, silicon and boron; a mixing step of mixing the metal raw material powder with a carbon source substance to produce a mixed powder; and a heat treatment step of subjecting the mixed powder to heat treatment at 1,250°C or higher in a non-oxidation atmosphere including nitrogen to spheroidize the metal raw material particles.SELECTED DRAWING: Figure 3
Inventors:
KURODA TOMOFUMI
SAKURAI YU
MITOSE TOMOHISA
SAKURAI YU
MITOSE TOMOHISA
Application Number:
JP2018168892A
Publication Date:
June 13, 2019
Filing Date:
September 10, 2018
Export Citation:
Assignee:
TDK CORP
International Classes:
B22F1/00; B22F3/00; C22C33/02; C22C38/00; H01F1/147; H01F1/20; H01F27/255
Domestic Patent References:
| JP2016146464A | 2016-08-12 | |||
| JP2016216818A | 2016-12-22 |
Attorney, Agent or Firm:
Maeda/Suzuki International Patent Corporation