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    NANO MAGNETO-RHEOLOGICAL FLUID AND PREPARATION METHOD AND DEVICE THEREOF
    4.
    发明申请
    NANO MAGNETO-RHEOLOGICAL FLUID AND PREPARATION METHOD AND DEVICE THEREOF 审中-公开

    公开(公告)号：US20180130583A1

    公开(公告)日：2018-05-10

    申请号：US15807146

    申请日：2017-11-08

    Applicant: Hunan Bohai New Materials Co., Ltd.

    Inventor： Yanling LIANG

    IPC: H01F1/44 ,  H01F1/00 ,  H01F1/057

    CPC classification number: H01F1/447 ,  B82Y25/00 ,  B82Y30/00 ,  H01F1/0045 ,  H01F1/0054 ,  H01F1/0571

    Abstract: A nano magneto-rheological fluid, comprising nano-scale magnetizable magnetic particles, wherein an average particle size or a minimum size in one dimension is less than 100 nanometers; and fluids used as carrier liquids, wherein the magnetic particles are dispersively distributed in the fluids. An apparatus for making the nanometric magnetorheological fluid including a ball mill, a settling separator located downstream of the ball mill for receiving the primary magnetic particles, a magnetic separator located downstream of and connected to the settling separator for receiving the upper layer of fluid containing fine magnetic particles, and an agitator for mixing the desired secondary magnetic particles with a carrier liquid and an additive. A method for making the nano magneto-rheological fluid wherein the nano magneto-rheological fluid has performance advantages such as no remanent magnetization, non-settlement, low viscosity, low abrasive rate for components, long service life, high reliability and fast and clear response.

    MOLTEN METAL TEMPERATURE CONTROL METHOD
    5.
    发明申请
    MOLTEN METAL TEMPERATURE CONTROL METHOD 审中-公开

    公开(公告)号：US20170102185A1

    公开(公告)日：2017-04-13

    申请号：US15290539

    申请日：2016-10-11

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Daisuke SAKUMA

    IPC: F27D21/00 ,  F27D21/02 ,  F27D11/06

    CPC classification number: F27D21/0014 ,  B22D2/006 ,  B22D11/0611 ,  C22C1/002 ,  C22C28/00 ,  C22C33/003 ,  C22C33/04 ,  C22C38/002 ,  C22C38/005 ,  C22C45/02 ,  F27D11/06 ,  F27D21/02 ,  F27D2019/0003 ,  F27D2019/0037 ,  H01F1/0571

    Abstract: A molten metal temperature control method includes: with respect to relations among a spheroidization distance traveled by a molten metal of an alloy from a nozzle tip to a position where the molten metal turns into droplets, the temperature of the molten metal inside the crucible, and a pressure acting on the molten metal inside the crucible, obtaining a relation between the temperature and the spheroidization distance at a predetermined pressure, and setting a predetermined temperature range of the temperature; measuring a spheroidization distance when discharging the molten metal from the crucible at the predetermined pressure, and specifying a temperature corresponding to the measured spheroidization distance; and comparing the specified temperature and the predetermined temperature range, and when the specified temperature is outside the predetermined temperature range, controlling the specified temperature so as to be within the predetermined temperature range by adjusting the temperature inside the crucible.

    RARE EARTH BASED MAGNET
    7.
    发明申请
    RARE EARTH BASED MAGNET 有权
    基于稀土的磁铁

    公开(公告)号：US20140292454A1

    公开(公告)日：2014-10-02

    申请号：US14229296

    申请日：2014-03-28

    Applicant: TDK CORPORATION

    Inventor： Eiji KATO ,  Yoshinori FUJIKAWA ,  Taeko TSUBOKURA ,  Chikara ISHIZAKA ,  Katsuo SATO

    IPC: H01F1/057

    CPC classification number: H01F1/0571 ,  H01F1/0577

    Abstract: The present invention provides a rare earth based magnet having a microstructure in which in a section of the R2T14B main-phase crystal grains, the number density of the fine products in the interior of (inside) the crystal grains is larger than that in the periphery of (outside) the crystal grains. That is, the rare earth based magnet includes R2T14B main-phase crystal grains and grain boundary phases formed between the R2T14B main-phase crystal grains. The R2T14B main-phase crystal grains include a substance where fine products are formed in the crystal grains. In the section of the main-phase crystal grains, when the crystal grains are divided into the interior of the crystal grains and the periphery of the crystal grains with a specific ellipse, the fine products are formed such that the number density in the interior is larger than that in the periphery.

    Abstract translation: 本发明提供一种稀土类磁体，其具有微结构，其中在R2T14B主相晶粒的截面中，晶粒内部（内部）的细微产物的数量密度大于周边 （外）晶粒。 也就是说，稀土类磁体包括在R2T14B主相晶粒之间形成的R2T14B主相晶粒和晶界相。 R2T14B主相晶粒包括在晶粒中形成细小产物的物质。 在主相晶粒的截面中，当晶粒分为晶粒内部和具有特定椭圆的晶粒周边时，形成精细产物，使得内部的数量密度为 大于周边的。

    Coating method and apparatus, a permanent magnet, and manufacturing method thereof
    8.
    发明授权
    Coating method and apparatus, a permanent magnet, and manufacturing method thereof 有权
    涂布方法和装置，永久磁铁及其制造方法

    公开(公告)号：US08771422B2

    公开(公告)日：2014-07-08

    申请号：US13163881

    申请日：2011-06-20

    Applicant: Hiroshi Nagata ,  Yoshinori Shingaki

    Inventor： Hiroshi Nagata ,  Yoshinori Shingaki

    IPC: C23C16/00 ,  B05D5/12

    CPC classification number: C23C14/16 ,  C23C14/243 ,  C23C14/541 ,  H01F1/0571 ,  H01F10/126 ,  H01F41/0293 ,  H01F41/20

    Abstract: The object of the present invention is to improve the productivity of a permanent magnet and to manufacture it at a low cost by effectively coating Dy and Tb on a surface of the magnet of Fe—B-rare earth elements having a predetermined configuration. The permanent magnet of the present invention is manufactured by a coating step for coating Dy on the surface of the magnet of Fe—B-rare earth elements having a predetermined configuration and a diffusing step for diffusing Dy coated on the surface of the magnet into crystal grain boundary phases of the magnet with being heat treated at a predetermined temperature. In this case, the coating step comprises a first step for heating a process chamber used for carrying out the coating step and generating metallic vapor atmosphere within the process chamber by vaporizing vaporizable metallic material previously arranged within the process chamber, and a second step for introducing into the process chamber the magnet held at a temperature lower than that within the process chamber and then selectively depositing the vaporizable metallic material on a surface of the magnet by an effect of temperature difference between the temperature within the process chamber and that of the magnet by the magnet reaches a predetermined temperature.

    Abstract translation: 本发明的目的是通过在具有预定构造的Fe-B-稀土元素的磁体的表面上有效地涂覆Dy和Tb来提高永磁体的生产率并以低成本制造。 本发明的永磁体通过涂布步骤制造，该涂覆步骤用于在具有预定结构的Fe-B-稀土元素的磁体的表面上涂覆Dy，并将用于将涂覆在磁体表面上的Dy扩散到晶体的扩散步骤 在预定温度下进行热处理的磁体的晶界相。 在这种情况下，涂覆步骤包括：第一步骤，用于加热用于进行涂覆步骤的处理室，并通过蒸发预先设置在处理室内的可蒸发金属材料，在处理室内产生金属蒸汽气氛;以及第二步骤，用于引入 进入处理室，磁体保持在低于处理室​​内的温度，然后通过处理室内的温度与磁体的温度之间的温度差的选择性地将可蒸发的金属材料沉积在磁体的表面上 磁体达到预定温度。

    PRODUCING METHOD OF R-T-B-BASED SINTERED MAGNET
    9.
    发明申请
    PRODUCING METHOD OF R-T-B-BASED SINTERED MAGNET 审中-公开
    R-T-B型烧结磁铁的制造方法

    公开(公告)号：US20130309122A1

    公开(公告)日：2013-11-21

    申请号：US13980944

    申请日：2012-01-26

    Applicant: Mitsuaki Mochizuki ,  Shoji Nakayama ,  Kazuhiro Sonoda

    Inventor： Mitsuaki Mochizuki ,  Shoji Nakayama ,  Kazuhiro Sonoda

    IPC: H01F41/02

    CPC classification number: H01F41/0246 ,  B22F2009/044 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/02 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  H01F1/0571 ,  H01F1/0573 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0273 ,  B22F9/023 ,  B22F2009/042 ,  B22F2201/20 ,  B22F2201/10

    Abstract: The present invention provides a producing method of R-T-B-based sintered magnets in which, the recovery chamber 40 includes inert gas introducing means 42, evacuating means 43, a carry-in port, a discharge port 40a, and a recovery container 60. The recovery step includes a carrying-in step of conveying a processing container 50 into the recovery chamber 40, a discharging step of discharging coarsely pulverized powder in the processing container 50 into the recovery chamber 40, a gas introducing step of introducing inert gas into the recovery chamber 40, and an alloy accommodating step of recovering the coarsely pulverized powder into the recovery container 60. Addition of pulverization aid is carried out in the alloy accommodating step. A remaining amount of coarsely pulverized powder in the recovery chamber 40, an oxygen-containing amount of the R-T-B-based sintered magnet is reduced, and magnetic properties are enhanced.

    Abstract translation: 本发明提供了一种RTB型烧结磁体的制造方法，其中回收室40包括惰性气体导入装置42，排气装置43，进料口，排出口40a和回收容器60.回收 步骤包括将处理容器50输送到回收室40中的搬入步骤，将处理容器50中的粗粉碎的粉末排出到回收室40中的排出步骤，将惰性气体引入回收室 以及将粗粉碎的粉末回收到回收容器60中的合金容纳步骤。在合金容纳步骤中进行粉碎助剂的添加。 在回收室40中残留量的粉碎粉末，R-T-B系烧结磁体的含氧量降低，磁特性提高。

    CERIUM BASED PERMANENT MAGNET MATERIAL
    10.
    发明申请
    CERIUM BASED PERMANENT MAGNET MATERIAL 审中-公开
    基于CERIUM的永久磁铁材料

    公开(公告)号：US20130160896A1

    公开(公告)日：2013-06-27

    申请号：US13773935

    申请日：2013-02-22

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： ERIC J. SKOUG ,  MARTIN S. MEYER ,  JAN F. HERBST ,  FREDERICK E. PINKERTON

    IPC: H01F1/053

    CPC classification number: C22C38/002 ,  B22F9/082 ,  C21D2201/03 ,  C22C33/003 ,  C22C38/005 ,  C22C45/02 ,  C22C2202/02 ,  H01F1/0571 ,  B22F2999/00

    Abstract: Useful permanent magnet materials are formed by processing molten alloys of cerium, iron, and boron to form permanent magnet compositions with appreciable coercivity and remanence. For example, Ce16.7Fe77.8B5.6 has been produced with coercivity, Hci of 6.18 kOe and remanence, Br of 4.92 kG. In a preferred practice, streams of the molten alloy are rapidly quenched (e.g., by melt spinning) to form magnetically-soft melt-spun material which is suitably annealed to obtain permanent magnet properties. Cobalt may be substituted for a portion of the iron content to increase the Curie temperature of the permanent magnet material. The rapid quench-anneal process is conducted to produce a fine-grain crystalline microstructure containing the Ce2(Fe,Co)14B phase in an amount of about seventy to ninety-five mass percent of the composition with a suitable amount of one or more secondary phases.

    Abstract translation: 通过加工铈，铁和硼的熔融合金形成有用的永磁材料，以形成具有可观的矫顽力和剩磁性的永磁体组合物。 例如，Ce16.7Fe77.8B5.6已经生产出矫顽力，Hci为6.18 kOe和剩磁，Br为4.92 kG。 在优选的实践中，熔融合金的流迅速淬火（例如通过熔融纺丝）以形成适当退火的磁软熔融材料，以获得永磁体性能。 钴可以代替一部分铁含量以增加永磁材料的居里温度。 进行快速淬火退火工艺以产生含有组合物的约75至59质量％的Ce 2（Fe，Co）14B相的细晶粒结晶微结构，其中合适量的一种或多种次级 阶段

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