Jfe Steel Corporation

National Institute of Advanced Industrial Science and Technology

Tokin Corporation

Shoichi Sato

Naomichi Nakamura

Mineo Muraki

Takuya Takashita

Kimihiro Ozaki

Akiri Urata

Makoto Nakaseko

Hoshiaki Terao

Toshinori Tsuda

Raita Wada

Makoto Yamaki

Yu Kanamori

Koichi Okamoto

Provided is a method of manufacturing a soft magnetic dust core. The method includes: preparing coated powder including amorphous powder made of an Fe-B-Si-P-C-Cu-based alloy, an Fe-B-P-C-Cu-based alloy, an Fe-B-Si-P-Cu-based alloy, or an Fe-B-P-Cu-based alloy, with a first initial crystallization temperature Tand a second initial crystallization temperature T; and a coating formed on a surface of particles of the amorphous powder; applying a compacting pressure to the coated powder or a mixture of the coated powder and the amorphous powder at a temperature equal to or lower than T−100 K; and heating to a maximum end-point temperature equal to or higher than T−50 K and lower than Twith the compacting pressure being applied.

Method of manufacturing soft magnetic dust core

Growing community of inventors

Sendai, Japan

Shoichi Sato