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公开(公告)号：US20180361474A9
公开(公告)日：2018-12-20
申请号：US15737429
申请日：2016-07-28
申请人： JFE STEEL CORPORATION , JFE PRECISION CORPORATION , TOKIN CORPORATION , National Institute of Advanced Industrial Science and Technology
发明人： Naomichi NAKAMURA , Makoto NAKASEKO , Takuya TAKASHITA , Mineo MURAKI , Hoshiaki TERAO , Raita WADA , Akiri URATA , Yu KANAMORI , Makoto YAMAKI , Koichi OKAMOTO , Toshinori TSUDA , Shoichi SATO , Kimihiro OZAKI
摘要： Provided is a soft magnetic dust core having high density and favorable properties. A method of manufacturing a soft magnetic dust core 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 Tx1 and a second initial crystallization temperature Tx2; 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 Tx1−100 K; and heating to a maximum end-point temperature equal to or higher than Tx1−50 K and lower than Tx2 with the compacting pressure being applied.
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公开(公告)号：US20180169759A1
公开(公告)日：2018-06-21
申请号：US15737429
申请日：2016-07-28
申请人： JFE STEEL CORPORATION , JFE PRECISION CORPORATION , TOKIN CORPORATION , National Institute of Advanced Industrial Science and Technology
发明人： Naomichi NAKAMURA , Makoto NAKASEKO , Takuya TAKASHITA , Mineo MURAKI , Hoshiaki TERAO , Raita WADA , Akiri URATA , Yu KANAMORI , Makoto YAMAKI , Koichi OKAMOTO , Toshinori TSUDA , Shoichi SATO , Kimihiro OZAKI
CPC分类号： B22F3/14 , B22F1/00 , B22F1/02 , B22F3/00 , B22F3/02 , B22F3/03 , B22F2301/35 , B22F2304/10 , C22C33/02 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/16 , C22C45/02 , C22C2200/02 , C22C2200/04 , C22C2202/02 , H01F1/15308 , H01F1/15325 , H01F1/15333 , H01F1/15375 , H01F3/08 , H01F27/255 , H01F41/0246
摘要： Provided is a soft magnetic dust core having high density and favorable properties. A method of manufacturing a soft magnetic dust core 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 Tx1 and a second initial crystallization temperature Tx2; 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 Tx1−100 K; and heating to a maximum end-point temperature equal to or higher than Tx1−50 K and lower than Tx2 with the compacting pressure being applied.
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公开(公告)号：US12030122B2
公开(公告)日：2024-07-09
申请号：US17075693
申请日：2020-10-21
申请人： JFE STEEL CORPORATION , TOKIN CORPORATION , National Institute of Advanced Industrial Science and Technology
发明人： Naomichi Nakamura , Makoto Nakaseko , Takuya Takashita , Mineo Muraki , Hoshiaki Terao , Raita Wada , Akiri Urata , Yu Kanamori , Makoto Yamaki , Koichi Okamoto , Toshinori Tsuda , Shoichi Sato , Kimihiro Ozaki
IPC分类号： B22F3/14 , B22F1/00 , B22F1/02 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/03 , C22C33/02 , C22C38/00 , C22C38/02 , C22C38/16 , C22C45/02 , H01F1/153 , H01F3/08 , H01F41/02 , H01F27/255
CPC分类号： B22F3/14 , B22F1/00 , B22F1/08 , B22F1/102 , B22F1/16 , B22F3/00 , B22F3/02 , B22F3/03 , C22C33/02 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/16 , C22C45/02 , H01F1/15308 , H01F1/15325 , H01F1/15333 , H01F1/15375 , H01F3/08 , H01F41/0246 , B22F2301/35 , B22F2304/10 , C22C2200/02 , C22C2200/04 , C22C2202/02 , H01F27/255
摘要： 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 Tx1 and a second initial crystallization temperature Tx2; 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 Tx1−100 K; and heating to a maximum end-point temperature equal to or higher than Tx1−50 K and lower than Tx2 with the compacting pressure being applied.
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