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公开(公告)号：US20180096762A1
公开(公告)日：2018-04-05
申请号：US15720251
申请日：2017-09-29
Applicant: HITACHI METALS, LTD.
Inventor： Daisuke YAMAMICHI , Masanao KAMACHI , Rintaro ISHII , Takahiro KATOU
CPC classification number: H01F1/0536 , B22F3/22 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C2202/02 , H01F1/0577 , H01F7/02
Abstract: A sintered R-TM-B magnet comprising 24.5-34.5% by mass of R, wherein R is at least one selected from rare earth elements including Y, 0.92-1.15% by mass of B, less than 0.1% by mass of Ni, 0.07-0.5% by mass of Ga, 0-0.4% by mass of Cu, and inevitable impurities, the balance being Fe; the amounts (% by mass) of Ga and Cu being in a region of a pentagon defined by a point A (0.5, 0.0), a point B (0.5, 0.4), a point C′ (0.1, 0.4), a point D′ (0.1, 0.1) and a point E (0.2, 0.0), on an X-Y plane in which the X-axis represents the amount of Ga, and the Y-axis represents the amount of Cu.
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公开(公告)号：US20180025818A1
公开(公告)日：2018-01-25
申请号：US15549777
申请日：2016-03-22
Applicant: HITACHI METALS, LTD.
Inventor： Daisuke YAMAMICHI , Masanao KAMACHI , Rintaro ISHII , Takahiro KATOU
CPC classification number: H01F1/0577 , B22F3/00 , B22F9/04 , B22F2009/044 , C22C33/02 , C22C38/00 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , H01F1/057 , H01F1/08 , H01F7/02
Abstract: A sintered R-TM-B magnet comprising 24.5-34.5% by mass of R, which is at least one selected from rare earth elements including Y, 0.85-1.15% by mass of B, less than 0.1% by mass of Co, 0.07-0.5% by mass of Ga, and 0-0.4% by mass of Cu, the balance being Fe and inevitable impurities; the amounts (% by mass) of Ga and Cu being in a region of a pentagon defined by a point A (0.5, 0.0), a point B (0.5, 0.4), a point C (0.07, 0.4), a point D (0.07, 0.1) and a point E (0.2, 0.0), on an X-Y plane in which the X-axis represents the amount of Ga, and the Y-axis represents the amount of Cu.
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