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    POWDER FOR MAGNET
    2.
    发明申请
    POWDER FOR MAGNET 有权
    磁粉粉

    公开(公告)号：US20160180992A1

    公开(公告)日：2016-06-23

    申请号：US15044861

    申请日：2016-02-16

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Toru MAEDA ,  Asako WATANABE

    IPC: H01F1/055

    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: 本发明提供一种可形成磁特性优异且成型性优异的稀土类磁体的粉末，磁铁用粉末的制造方法，粉末成形体和稀土 - 铁 - 硼系的粉末 合金材料。 构成磁体用粉末的磁性粒子各自包含将稀土元素的氢化合物的相3的粒子分散在含铁材料的相2中的结构。 由于含铁材料的相2均匀地存在于每个磁性颗粒1中，所以粉末具有优异的成型性，并且容易增加粉末压块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，在氢气氛中稀土 - 铁 - 硼基合金粉末（R-Fe-B基合金），以分离 粉末进入稀土元素和含铁材料，并产生稀土元素的氢化合物。 粉末压实体4是通过压实用于磁体的粉末来制造的。 粉末压块4在真空中热处理以产生R-Fe-B基合金材料5，并且将R-Fe-B基合金5磁化以产生R-Fe-B基合金磁体 6。

    METHOD OF MANUFACTURING ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING R-T-B-BASED RARE EARTH SINTERED MAGNET
    3.
    发明申请
    METHOD OF MANUFACTURING ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING R-T-B-BASED RARE EARTH SINTERED MAGNET 审中-公开
    制造R-T-B系稀土烧结磁体的合金方法及制造R-T-B系稀土烧结磁铁的方法

    公开(公告)号：US20160012946A1

    公开(公告)日：2016-01-14

    申请号：US14789495

    申请日：2015-07-01

    Applicant: SHOWA DENKO K.K.

    Inventor： Masaki HORIKITA ,  Takashi YAMAZAKI ,  Kenichiro NAKAJIMA

    IPC: H01F1/057 ,  B22F9/08 ,  H01F41/02 ,  B22F9/02

    CPC classification number: H01F1/0573 ,  B22F9/023 ,  B22F9/08 ,  C22C33/0278 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0266

    Abstract: Provided is a method of manufacturing an alloy for an R-T-B-based rare earth sintered magnet, with which an R-T-B-based magnet having high coercive force can be obtained even when the B concentration is low and the Dy concentration is zero or extremely low.This method includes: a casting step of manufacturing a cast alloy by casting a molten alloy, a hydrogenating step of absorbing hydrogen in the cast alloy; and a dehydrogenating step of removing hydrogen from the cast alloy absorbing hydrogen in an inert gas atmosphere at a temperature lower than 550° C., wherein the molten alloy consists of B, a rare earth element R, a transition metal T essentially containing Fe, a metal element M, and unavoidable impurities, in which the R content is 13 at % to 15.5 at %, the B content is 5.0 at % to 6.0 at %, the M content is 0.1 at % to 2.4 at %, the T content is a balance, a ratio of a Dy content to the total content of the rare earth element is 0 at % to 65 at %, and the molten alloy satisfies the below formula (1). 0.32≦B/TRE≦0.40  (1).

    Abstract translation: 提供一种制造用于R-T-B系稀土烧结磁体的合金的方法，即使当B浓度低，Dy浓度为零或极低时，也可以获得具有高矫顽力的R-T-B系磁体。 该方法包括：通过铸造熔融合金制造铸造合金的铸造步骤，在铸造合金中吸氢的氢化步骤; 以及在低于550℃的温度下在惰性气体气氛中从铸造合金中除去氢的脱氢步骤，其中熔融合金由B组成，稀土元素R，基本上含有Fe的过渡金属T， 金属元素M和不可避免的杂质，其中R含量为13原子％至15.5原子％，B含量为5.0原子％至6.0原子％，M含量为0.1原子％至2.4原子％，T含量 是余量，Dy含量与稀土元素的总含量的比例为0at％〜65at％，熔融合金满足下式（1）。 0.32＆nlE; B / TRE＆nlE; 0.40（1）。

    Method for preparing R-Fe-B-based rare earth magnetic powder for a bonded magnet, magnetic powder prepared by the method, method for producing a bonded magnet using the magnetic powder, and bonded magnet produced by the method
    4.
    发明授权
    Method for preparing R-Fe-B-based rare earth magnetic powder for a bonded magnet, magnetic powder prepared by the method, method for producing a bonded magnet using the magnetic powder, and bonded magnet produced by the method 有权
    用于制备用于粘结磁体的R-Fe-B系稀土磁性粉末的方法，通过该方法制备的磁粉，使用该磁性粉末的粘结磁体的制造方法和通过该方法制造的粘结磁体

    公开(公告)号：US09230721B2

    公开(公告)日：2016-01-05

    申请号：US13807994

    申请日：2011-07-01

    Applicant: Ji-Hun Yu ,  Dongwon Lee ,  Junggoo Lee

    Inventor： Ji-Hun Yu ,  Dongwon Lee ,  Junggoo Lee

    IPC: B28B1/14 ,  B28B1/24 ,  H01F1/01 ,  B22F9/02 ,  C22C33/02 ,  C22C38/00 ,  C22C1/02 ,  H01F1/057

    CPC classification number: H01F1/01 ,  B22F9/023 ,  C22C1/02 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  H01F1/0573 ,  H01F1/0578

    Abstract: A method of preparing R—Fe—B-based rare earth magnetic powder for a bonded magnet and magnetic powder prepared thereby, and a method of manufacturing a bonded magnet using magnetic powder and a bonded magnet manufactured thereby. Further, a method of preparing R—Fe—B-based rare earth magnetic powder having improved magnetic properties including grinding rare earth sintered magnet products as a raw material, performing a hydrogenation process where a ground product is charged into a furnace, and the furnace is then filled with hydrogen and a temperature of the furnace is increased, performing a disproportionation process where the temperature of the furnace is further increased in the same hydrogen atmosphere above, performing a desorption process where hydrogen is exhausted from an inside of the furnace, and performing a recombination process where hydrogen in the inside of the furnace is exhausted, and magnetic powder prepared thereby, and a method of manufacturing a bonded magnet.

    Abstract translation: 制备用于粘结磁体的R-Fe-B系稀土磁性粉末和由此制备的磁性粉末的方法，以及由此制造使用磁粉和粘结磁体的粘结磁体的方法。 此外，制备具有改善磁性能的R-Fe-B系稀土磁性粉末的方法，包括研磨稀土烧结磁体产品作为原料，进行将研磨产物装入炉中的氢化工艺，以及炉 然后填充氢气，并且炉的温度升高，进行歧化过程，其中在上述相同的氢气氛中进一步增加炉的温度，进行氢从炉内排出的解吸过程，以及 进行炉内部的氢耗尽的重组工艺及其制备的磁粉，以及粘结磁铁的制造方法。

    METHOD AND DEVICE FOR RECOVERING HYDROGEN PULVERIZED POWDER OF RAW-MATERIAL ALLOY FOR RARE-EARTH MAGNET
    5.
    发明申请
    METHOD AND DEVICE FOR RECOVERING HYDROGEN PULVERIZED POWDER OF RAW-MATERIAL ALLOY FOR RARE-EARTH MAGNET 审中-公开
    用于回收原料合金的氢粉末粉末的方法和装置

    公开(公告)号：US20150158086A1

    公开(公告)日：2015-06-11

    申请号：US14607016

    申请日：2015-01-27

    Applicant: HITACHI METALS, LTD.

    Inventor： Shoji NAKAYAMA ,  Kazuhiro SONODA ,  Jyunichi SANAI

    IPC: B22F9/16 ,  H01F41/00 ,  H01F1/053

    CPC classification number: B22F9/16 ,  B22F8/00 ,  B22F2999/00 ,  C22B7/001 ,  C22B59/00 ,  C22C28/00 ,  C22C2202/02 ,  H01F1/053 ,  H01F1/0553 ,  H01F1/0573 ,  H01F41/00 ,  Y02P10/214 ,  Y02P10/24 ,  Y02W30/541 ,  B22F9/023

    Abstract: A method and a device for recovering hydrogen pulverized powder of a raw-material alloy for rare-earth magnets capable of lowering a possibility that hydrogen pulverized powder after hydrogen was pulverized remains in a recovery chamber and capable of enhancing magnetic properties by reducing an amount of oxygen of an obtained rare-earth magnet, a processing container 50 is carried into a recovery chamber 40 from a processing chamber through a carry-in port after inert gas was introduced into the recovery chamber 40 by inert gas introducing means 12, the raw-material alloy for rare-earth magnets in the processing container 50 is discharged into the recovery chamber 40 after the pressure in the recovery chamber 40 was reduced by evacuating means 33 and thereafter, inert gas is introduced into the recovery chamber 40 by inert gas introducing means 12, and the raw-material alloy for rare-earth magnets is recovered into the recovery container 50 from an discharge port 40a after a pressure in the recovery chamber 40 was set to a predetermined pressure by inert gas.

    Abstract translation: 用于回收能够降低在氢气粉碎后氢粉碎的粉末的可能性的稀土类磁体原料合金的氢粉碎粉末的方法和装置保留在回收室中，并且能够通过减少 通过惰性气体导入机构12将惰性气体引入回收室40后，将得到的稀土类磁体的氧气，处理容器50从处理室经由输入口搬送到回收室40中， 处理容器50中的稀土类磁铁材料合金在通过抽气装置33减少回收室40中的压力后排出到回收室40中，然后通过惰性气体导入装置将惰性气体引入回收室40 如图12所示，稀释磁铁原料合金在压力后从排出口40a回收到回收容器50中 在回收室40中通过惰性气体设定为规定的压力。

    METHOD FOR PRODUCING NdFeB SYSTEM SINTERED MAGNET
    6.
    发明申请
    METHOD FOR PRODUCING NdFeB SYSTEM SINTERED MAGNET 有权
    生产NdFeB系统烧结磁体的方法

    公开(公告)号：US20150125336A1

    公开(公告)日：2015-05-07

    申请号：US14397564

    申请日：2013-06-27

    Applicant: INTERMETALLICS CO., LTD.

    Inventor： Masato Sagawa ,  Tetsuhiko Mizoguchi ,  Yasuhiro Une

    IPC: H01F41/02 ,  H01F1/08 ,  B22F3/10 ,  H01F1/053

    CPC classification number: H01F41/0266 ,  B22F3/10 ,  B22F3/16 ,  B22F2998/10 ,  C22C14/00 ,  C22C33/02 ,  C22C38/001 ,  C22C38/005 ,  C22C38/02 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0536 ,  H01F1/0573 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/026 ,  B22F9/023 ,  B22F9/04

    Abstract: A method for producing a NdFeB system sintered magnet. The method includes: a hydrogen pulverization process, in which coarse powder of a NdFeB system alloy is prepared by coarsely pulverizing a lump of NdFeB system alloy by making this lump occlude hydrogen; a fine pulverization process, in which fine powder is prepared by performing fine pulverization for further pulverizing the coarse powder; a filling process, in which the fine powder is put into a filling container; an orienting process, in which the fine powder in the filling container is oriented; and a sintering process, in which the fine powder after the orienting process is sintered as held in the filling container. The processes from hydrogen pulverization through orienting are performed with neither dehydrogenation heating nor evacuation each for desorbing hydrogen occluded in the hydrogen pulverization process. The processes from hydrogen pulverization through sintering are performed in an oxygen-free atmosphere.

    Abstract translation: NdFeB系烧结磁体的制造方法。 该方法包括：氢粉碎工艺，其中通过使该块堵塞氢来粗粉碎NdFeB系合金块，制备钕铁硼系合金粗粉末; 精细粉碎工序，其中通过进行细粉碎以进一步粉碎粗粉而制备细粉末; 填充过程，其中将细粉末放入填充容器中; 定向方法，其中填充容器中的细粉末定向; 以及将定向处理后的细粉末保持在填充容器中进行烧结的烧结工序。 通过定向氢氢粉碎的方法既进行脱氢加热也不进行排气，以解吸氢气粉碎过程中吸收的氢。 在无氧气氛中进行氢粉碎至烧结的工序。

    R-T-B-BASED RARE EARTH MAGNET PARTICLES, PROCESS FOR PRODUCING THE R-T-B-BASED RARE EARTH MAGNET PARTICLES, AND BONDED MAGNET
    8.
    发明申请
    R-T-B-BASED RARE EARTH MAGNET PARTICLES, PROCESS FOR PRODUCING THE R-T-B-BASED RARE EARTH MAGNET PARTICLES, AND BONDED MAGNET 审中-公开
    基于R-T-B的稀土磁体颗粒，用于生产基于R-T-B的稀土磁体颗粒和粘结磁体的方法

    公开(公告)号：US20140266525A1

    公开(公告)日：2014-09-18

    申请号：US14205894

    申请日：2014-03-12

    Applicant: TODA KOGYO CORP.

    Inventor： Nobuhiro KATAYAMA ,  Hirofumi KAWASAKI ,  Koichiro MORIMOTO

    IPC: H01F1/06 ,  H01F7/02 ,  H01F41/00

    CPC classification number: H01F1/0573 ,  B22F9/04 ,  B22F2998/10 ,  B22F2999/00 ,  C21D6/00 ,  C21D2201/00 ,  C22C33/0278 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C2202/02 ,  H01F1/0578 ,  B22F2201/013 ,  B22F1/0085 ,  B22F2201/20 ,  B22F2201/11

    Abstract: An object of the present invention is to enhance a coercive force of magnetic particles by promoting formation of a continuous R-rich grain boundary phase in a crystal grain boundary of a magnetic phase of the particles, and to thereby obtain R-T-B-based rare earth magnet particles further having a high residual magnetic flux density. The present invention relates to production of R-T-B-based rare earth magnet particles capable of exhibiting a high coercive force even when a content of Al therein is reduced, and a high residual magnetic flux density, in which formation of an R-rich grain boundary phase therein can be promoted by heat-treating Al-containing R-T-B-based rare earth magnet particles obtained by HDDR treatment in vacuum or in an Ar atmosphere at a temperature of not lower than 670° C. and not higher than 820° C. for a period of not less than 30 min and not more than 300 min.

    Abstract translation: 本发明的目的是通过促进在粒子的磁性相的晶界中形成连续的富R相的晶界而提高磁性粒子的矫顽力，由此得到RTB系稀土类磁铁 颗粒进一步具有高剩余磁通密度。 本发明涉及即使当其中Al含量降低时也能表现出高矫顽力的RTB型稀土磁体颗粒的生产和高残余磁通密度，其中形成富R晶界相 可以通过在真空中或在Ar气氛中在不低于670℃且不高于820℃的温度下热处理由HDDR处理获得的含有Al的RTB基稀土磁体颗粒来促进其中的 时间不少于30分钟，不超过300分钟。

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