公开(公告)号：EP4002398B1

公开(公告)日：2024-09-04

申请号：EP21208954.4

申请日：2021-11-18

IPC: H01F41/02 ,  H01F1/057

CPC classification number: H01F1/0577 ,  H01F41/0273

公开(公告)号：EP4152348B1

公开(公告)日：2024-05-08

申请号：EP20942024.9

申请日：2020-06-23

IPC: H01F1/057 ,  H01F41/02

CPC classification number: H01F41/0273 ,  H01F1/0577

公开(公告)号：EP2869319B1

公开(公告)日：2018-08-08

申请号：EP13810728.9

申请日：2013-06-25

Applicant: Hitachi Metals, Ltd.

Inventor： TSUKADA, Takashi ,  NANSAKA, Takuya ,  KIKUCHI, Satoru

IPC: H01F41/02 ,  B22F3/02 ,  B22F3/22 ,  C22C38/00 ,  H01F1/057 ,  H01F1/08 ,  B22F9/04 ,  B30B11/00 ,  B30B11/02 ,  B22F3/12 ,  C22C38/10 ,  C22C38/16 ,  C22C38/06

CPC classification number: H01F41/0266 ,  B22F3/02 ,  B22F3/12 ,  B22F2998/10 ,  B22F2999/00 ,  B30B11/008 ,  B30B11/027 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0273 ,  B22F2202/05

Abstract: The present invention provides a method for producing a long and large-sized rare earth sintered magnet having a large size in a magnetic field application direction in which a single magnet body in each portion has uniform and high magnetic characteristics. Disclosed is a method for producing a rare earth sintered magnet, including the steps of: 1) preparing a slurry that contains an alloy powder containing a rare earth element, iron, and boron, and a dispersion medium at a predetermined ratio; 2) preparing a cavity that is enclosed with a mold, and an upper punch and a lower punch, at least one of which is movable toward and away from the other one in the mold, and also includes an outlet for discharging the dispersion medium of the slurry; 3) applying a magnetic field of 1.5 T or more in the cavity in the direction parallel to the direction in which at least one of the upper punch and the lower punch is movable, and supplying the slurry at a flow rate of 20 to 600 cm 3 /second in a state where the upper punch and the lower punch remain stationary, to fill the cavity with the slurry; 4) producing a molded body of the alloy powder by press molding in the magnetic field in which the upper punch and the lower punch come closer to each other while applying the magnetic field; and 5) sintering the molded body.

公开(公告)号：EP3200209A4

公开(公告)日：2018-07-25

申请号：EP15793661

申请日：2015-09-18

Applicant: NDFEB CORP

Inventor： SAGAWA MASATO ,  HAYASHI SHINICHI

IPC: H01F41/02 ,  B22F3/00 ,  B22F3/02 ,  B22F3/03 ,  B30B15/02 ,  B30B15/30 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  H01F1/055 ,  H01F1/057 ,  H01F1/08

CPC classification number: H01F1/0577 ,  B22F1/0011 ,  B22F1/0062 ,  B22F3/003 ,  B22F3/004 ,  B22F3/03 ,  B22F3/1017 ,  B22F9/04 ,  B22F2009/044 ,  B22F2301/355 ,  B22F2302/45 ,  B22F2303/01 ,  B22F2304/10 ,  B22F2998/10 ,  B30B15/022 ,  B30B15/302 ,  C22C38/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0551 ,  H01F1/0557 ,  H01F1/0573 ,  H01F1/086 ,  H01F41/0273 ,  B22F1/007 ,  B22F9/023 ,  B22F2009/048 ,  B22F9/08 ,  B22F2201/013 ,  B22F3/10 ,  B22F2202/05

Abstract: Provided is a production method and a production device for producing each of the rare earth sintered magnet sintered bodies without carrying a mold in a sintering furnace. The production method comprises a powder feeding step of feeding an alloy powder into a mold having side walls divided into two or more sections; a filling step of filling the alloy powder into the mold to prepare a filled molded-body; an orienting step of orienting the alloy powder in the filled molded-body by applying a magnetic field to the filled molded-body to prepare an oriented filled-molded-body; a retrieving step of detaching the side walls of the mold from the oriented filled-molded-body and retrieving the oriented filled-molded-body from the mold; and a sintering step of sintering the retrieved oriented filled-molded-body, wherein the filling step and the orienting step are performed at different locations, and it is preferred that a pulsed magnetic field is applied in the orienting step and inside of the mold is partitioned into a plurality of cavities by partitions.

公开(公告)号：EP3093857A4

公开(公告)日：2017-08-30

申请号：EP14876586

申请日：2014-12-29

Applicant: UNIV SEVILLA ,  UNIV HUELVA

Inventor： MONTES MARTOS JUAN MANUEL ,  CINTAS FÍSICO JESÚS ,  GÓMEZ CUEVAS FRANCISCO ,  TERNERO FERNÁNDEZ FÁTIMA

IPC: B22F3/14 ,  C22C1/04 ,  C22C19/00 ,  C22C33/02 ,  C22C38/00 ,  H01F41/02

CPC classification number: C22C28/00 ,  B22F3/105 ,  B22F3/14 ,  B22F2003/1051 ,  B22F2998/10 ,  B22F2999/00 ,  C22C9/00 ,  C22C19/007 ,  C22C19/03 ,  C22C19/07 ,  C22C33/02 ,  C22C38/00 ,  C22C2200/02 ,  H01F41/0273 ,  B22F2202/05

公开(公告)号：EP2481502A4

公开(公告)日：2017-08-02

申请号：EP11768887

申请日：2011-04-13

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： MAEDA TORU ,  WATANABE ASAKO

IPC: B22F3/02 ,  B22F3/10 ,  B22F3/24 ,  B22F9/02 ,  C22C33/02 ,  H01F1/057 ,  H01F41/02

CPC classification number: H01F1/0551 ,  B22F3/02 ,  B22F3/101 ,  B22F3/24 ,  B22F9/023 ,  C22C33/0278 ,  H01F1/0573 ,  H01F1/0578 ,  H01F41/0273 ,  Y10T428/2982

Abstract: The present invention provides a powder for a magnet which can form a rare earth magnet having excellent magnetic characteristics and which has excellent moldability, a method for producing the powder for a magnet, a powder compact, and a rare earth-iron-boron-based alloy material. Magnetic particles constituting a powder for a magnet each include a structure in which a particle of a phase 3 of a hydrogen compound of a rare earth element is dispersed in a phase 2 of an iron-containing material. Since the phase 2 of the iron-containing material is uniformly present in each of the magnetic particles 1, the powder has excellent moldability and easily increases the density of a powder compact 4. The powder for a magnet can be produced by heat-treating a powder of a rare earth-iron-boron-based alloy (R-Fe-B-based alloy) in a hydrogen atmosphere at a temperature equal to or higher than the disproportionation temperature of the R-Fe-B-based alloy to separate the powder into the rare earth element and the iron-containing material and to produce the hydrogen compound of the rare earth element. The powder compact 4 is produced by compacting the powder for a magnet. The powder compact 4 is heat-treated in a vacuum to produce a R-Fe-B-based alloy material 5, and the R-Fe-B-based alloy 5 is magnetized to produce a R-Fe-B-based alloy magnet 6.

Abstract translation: 本发明提供一种能够形成具有优异的磁特性并且成形性优异的稀土类磁铁的磁铁用粉末，该磁铁用粉末，粉末成形体以及稀土 - 铁 - 硼类的制造方法 合金材料。 构成磁铁用粉末的磁性粒子各自包含稀土元素的氢化合物的相3的粒子分散在含铁物质的相2中的结构。 由于含铁物质的相2均匀地存在于每个磁性颗粒1中，所以该粉末具有优异的成型性并容易增加粉末压块4的密度。用于磁体的粉末可以通过热处理 在等于或高于R-Fe-B基合金的歧化温度的温度下在氢气氛中将稀土 - 铁 - 硼基合金（R-Fe-B基合金）的粉末分离 粉末加入到稀土元素和含铁材料中并产生稀土元素的氢化合物。 粉末压块4是通过压缩磁体粉末而制成的。 将粉末成形体4在真空中进行热处理，制作R-Fe-B系合金材料5，对该R-Fe-B系合金5进行磁化，制作出R-Fe-B系合金磁体 6。

公开(公告)号：EP1788594B1

公开(公告)日：2017-04-12

申请号：EP05765338.8

申请日：2005-06-30

Applicant: INTERMETALLICS CO., LTD.

Inventor： Sagawa, Masato ,  Nagata, Hiroshi ,  Itatani, Osamu

IPC: H01F41/02 ,  B22F3/00 ,  B22F3/02 ,  B22F3/087 ,  C22C1/04 ,  C22C33/02 ,  H01F1/057

CPC classification number: H01F41/0246 ,  B22F3/1021 ,  B22F2998/10 ,  C22C1/0433 ,  C22C33/0278 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  H01F1/0557 ,  H01F1/0577 ,  H01F41/0273 ,  B22F2201/10 ,  B22F9/08 ,  B22F3/004 ,  B22F2202/01 ,  B22F3/005 ,  B22F2202/05 ,  B22F9/04

公开(公告)号：EP2586755B1

公开(公告)日：2016-11-23

申请号：EP13152546.1

申请日：2008-12-18

Applicant: Tridelta Hartferrite GmbH

Inventor： Mikenda, Kevin

IPC: C04B35/32 ,  C04B35/40 ,  C01G49/00 ,  C01G51/00 ,  H01F1/11 ,  H01F41/02

CPC classification number: C04B35/2633 ,  C01G49/0018 ,  C01G49/009 ,  C01G51/006 ,  C01P2002/52 ,  C01P2006/42 ,  C04B35/2641 ,  C04B35/6262 ,  C04B35/62675 ,  C04B35/62685 ,  C04B2235/3213 ,  C04B2235/3227 ,  C04B2235/3277 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/605 ,  C04B2235/656 ,  C04B2235/767 ,  H01F1/11 ,  H01F41/0273

公开(公告)号：EP3093857A1

公开(公告)日：2016-11-16

申请号：EP14876586.0

申请日：2014-12-29

Applicant: Universidad De Sevilla ,  Universidad De Huelva

Inventor： MONTES MARTOS, Juan Manuel ,  CINTAS FÍSICO, Jesús ,  GÓMEZ CUEVAS , Francisco ,  TERNERO FERNÁNDEZ, Fátima

IPC: H01F1/055 ,  C22C1/04 ,  C22C19/00 ,  C22C33/02 ,  C22C38/00

CPC classification number: C22C28/00 ,  B22F3/105 ,  B22F3/14 ,  B22F2003/1051 ,  B22F2998/10 ,  B22F2999/00 ,  C22C9/00 ,  C22C19/007 ,  C22C19/03 ,  C22C19/07 ,  C22C33/02 ,  C22C38/00 ,  C22C2200/02 ,  H01F41/0273 ,  B22F2202/05

Abstract: The invention relates to a novel method for producing magnets (especially applicable to the production of magnets containing rare earths). The novelty of the method lies in its use of a type of electrical consolidation (such as so-called electrical resistance sintering, ERS, or so-called electrical discharge consolidation, EDC, but not necessarily one of the these) as a substitute for the conventional cold pressing and sintering method which is usually used. The method according to the invention achieves: (1) combining the compacting/sintering steps, significantly cutting the duration thereof and reducing the magnitude of the working pressures; (2) implementing the steps of magnetic aligning, pressing/sintering, heat treatment and magnetising in the same matrix; and (3) rendering superfluous the use of protective atmospheres during the sintering process.

Abstract translation: 本发明涉及一种用于制造磁体的新方法（特别适用于生产含有稀土的磁体）。 该方法的新颖之处在于其使用一种电气固结（例如所谓的电阻烧结，ERS或所谓的放电固结，EDC，但不一定是其中之一）作为替代 通常使用的常规冷压和烧结方法。 根据本发明的方法实现：（1）组合压实/烧结步骤，显着地减少其持续时间并减小工作压力的大小; （2）在相同的基质中实施磁选，压/烧，热处理和磁化步骤; 和（3）在烧结过程中使用保护性气氛多余。

公开(公告)号：EP2896056B1

公开(公告)日：2016-10-26

申请号：EP13762443.3

申请日：2013-09-10

Applicant: MagComp AB

Inventor： BJARNASEN, Óscar H. ,  CEDELL, Tord

IPC: H01F5/06 ,  H01F27/32 ,  H01F41/07 ,  H01F3/08 ,  H01F17/04 ,  H01F27/25 ,  H01F5/00 ,  H01F27/28 ,  H01F41/02 ,  H01F41/12 ,  H01F27/255 ,  H01F41/073

CPC classification number: H01F5/06 ,  H01F3/08 ,  H01F5/00 ,  H01F17/04 ,  H01F27/255 ,  H01F27/2823 ,  H01F27/2876 ,  H01F27/32 ,  H01F41/0246 ,  H01F41/0273 ,  H01F41/073 ,  H01F41/12 ,  Y10T29/49071