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    RFeB-BASED MAGNET PRODUCTION METHOD, RFeB-BASED MAGNET, AND COATING MATERIAL FOR GRAIN BOUNDARY DIFFUSION PROCESS
    1.
    发明公开
    RFeB-BASED MAGNET PRODUCTION METHOD, RFeB-BASED MAGNET, AND COATING MATERIAL FOR GRAIN BOUNDARY DIFFUSION PROCESS 有权
    用于制造晶粒限制扩散工艺的RFEB磁体，RFEB磁体和涂覆材料的方法

    公开(公告)号：EP2977998A4

    公开(公告)日：2016-03-23

    申请号：EP14768462

    申请日：2014-03-13

    Applicant: INTERMETALLICS CO LTD ,  DAIDO STEEL CO LTD

    Inventor： SAGAWA MASATO ,  TAKAGI SHINOBU ,  HASHINO HAYATO

    IPC: H01F41/02 ,  B22F1/00 ,  B22F3/24 ,  B22F9/00 ,  C22C38/00 ,  H01F1/057 ,  H01F1/08

    CPC classification number: H01F1/0571 ,  B22F1/02 ,  B22F3/14 ,  C22C28/00 ,  C22C38/00 ,  C22C2202/02 ,  H01F1/0576 ,  H01F1/0577 ,  H01F41/0253 ,  H01F41/0293

    Abstract: The present invention addresses the problem of providing a method for producing an RFeB system magnet with high coercivity by preventing a coating material from peeling off the surface of a base material during a grain boundary diffusion treatment. Provided is a method for producing an R L 2 Fe 14 B system magnet which is a sintered magnet or a hot-deformed magnet containing, as the main rare-earth element, a light rare-earth element R L which is at least one of the two elements ofNd and Pr, the method including the steps of: applying, to a surface of a base material M of the R L 2 Fe 14 B system magnet, a coating material 10 prepared by mixing a silicone grease 11 and an R H -containing powder 14 containing a heavy rare-earth element R H composed of at least one element selected from the group of Dy, Tb and Ho; and heating the base material M together with the coating material. The silicone having a siloxane bond prevents the coating material 10 from peeling off the surface of the base material M during the heating process. The improved adhesion of the coating material 10 to the base material M facilitates transfer of R H into the grain boundaries of the base material M, whereby the coercivity is increased.

    SINTERED MAGNET PRODUCTION DEVICE AND SINTERED MAGNET PRODUCTION METHOD
    2.
    发明公开
    SINTERED MAGNET PRODUCTION DEVICE AND SINTERED MAGNET PRODUCTION METHOD 审中-公开
    器具，用于产生一种生产烧结磁体的烧结磁铁和方法

    公开(公告)号：EP2955731A4

    公开(公告)日：2016-01-20

    申请号：EP14748535

    申请日：2014-02-03

    Applicant: INTERMETALLICS CO LTD ,  DAIDO STEEL CO LTD

    Inventor： SAGAWA MASATO ,  MIZOGUCHI TETSUHIKO ,  YOSHIKAWA NORIO

    IPC: H01F41/02 ,  B22F3/00 ,  B22F3/02 ,  B22F3/10 ,  H01F1/055 ,  H01F1/057 ,  H01F1/08 ,  H01F13/00

    CPC classification number: H01F41/0273 ,  B22F3/10 ,  C22C2202/02 ,  F27B9/067 ,  F27B9/20 ,  F27B9/36 ,  F27B9/38 ,  F27D5/00 ,  Y02P10/253

    Abstract: The present invention addresses the problem of providing a sintered magnet production system using a press-less method capable of minimizing the distortion of a sintered magnet. It is a system including: a filling device 11 for filling a cavity 211 of a container 21 with alloy powder of a material for a sintered magnet; an orienting section 13 for orienting the alloy powder held in the cavity 211 by applying a magnetic field without applying a mechanical pressure to the alloy powder; and a sintering section 15 for sintering the alloy powder oriented by the orienting section 13, by heating the alloy powder without applying a mechanical pressure to the alloy powder. The orienting section includes: an air-core coil 131; and two ferromagnetic members 132 made of a ferromagnetic material to be arranged within the air-core coil 131 at respective open ends of the air-core coil 131 with a space for containing the container 21 in between. The ferromagnetic members 132 adjust the magnetic field within the air-core coil 131 toward a direction parallel to the axis of the air-core coil 131, whereby the distortion of a sintered magnet is minimized.

    SINTERED NEODYMIUM MAGNET
    3.
    发明公开
    SINTERED NEODYMIUM MAGNET 有权
    烧结钕磁铁

    公开(公告)号：EP2800108A4

    公开(公告)日：2015-08-12

    申请号：EP12863318

    申请日：2012-12-27

    Applicant: INTERMETALLICS CO LTD

    Inventor： SAGAWA MASATO ,  MIZOGUCHI TETSUHIKO

    IPC: H01F1/08 ,  B22F1/00 ,  B22F3/00 ,  C22C33/02 ,  H01F1/057 ,  H01F41/02

    CPC classification number: H01F1/0577 ,  C22C33/02 ,  C22C38/005 ,  C22C2202/02 ,  H01F41/0293

    Abstract: Provided is a NdFeB system sintered magnet which is produced by the grain boundary diffusion method and yet has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. A NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the "Dy and/or Tb" is hereinafter called R H ) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the difference C s -C d3 between the R H content C s (wt%) in the grain boundary reaching the surface to which R H is attached and the R H content C d3 (wt%) in the grain boundary at a depth of 3 mm from the aforementioned attachment surface is equal to or smaller than 20 wt%.

    SINTERED NEODYMIUM MAGNET
    6.
    发明公开
    SINTERED NEODYMIUM MAGNET 审中-公开
    烧结钕磁铁

    公开(公告)号：EP2693451A4

    公开(公告)日：2014-07-30

    申请号：EP12863911

    申请日：2012-12-27

    Applicant: INTERMETALLICS CO LTD

    Inventor： SAGAWA MASATO ,  MIZOGUCHI TETSUHIKO

    IPC: H01F1/08 ,  B22F1/00 ,  B22F3/00 ,  C22C33/02 ,  H01F1/057 ,  H01F41/02

    CPC classification number: H01F1/0577 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/057 ,  H01F41/0293

    Abstract: Provided is a NdFeB system sintered magnet which is produced by the grain boundary diffusion method and yet has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. A NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the "Dy and/or Tb" is hereinafter called R H ) attached to and diffused from a surface of the base material through the grain boundary inside the base material by a grain boundary diffusion treatment, wherein the difference C gx -C x between the R H content C gx (wt%) in the grain boundary and the R H content C x (wt%) in main-phase grains which are grains constituting the base material at the same depth within a range from the surface to which R H is attached to a depth of 3 mm is equal to or larger than 3 wt%.

    RFeB-BASED MAGNET AND PROCESS FOR PRODUCING RFeB-BASED MAGNET
    9.
    发明公开
    RFeB-BASED MAGNET AND PROCESS FOR PRODUCING RFeB-BASED MAGNET 审中-公开
    RFEB-BASIERTES MAGNETS VERFAHREN ZUR HERSTELLUNG EINES RFEB-BASIERTEN MAGNETS

    公开(公告)号：EP3151252A4

    公开(公告)日：2017-07-05

    申请号：EP15803329

    申请日：2015-05-25

    Applicant: INTERMETALLICS CO LTD ,  DAIDO STEEL CO LTD

    Inventor： MIZOGUCHI TETSUHIKO ,  SAGAWA MASATO

    IPC: B22F3/24 ,  C22C28/00 ,  C22C38/00 ,  H01F41/02

    CPC classification number: H01F41/0293 ,  B22F3/24 ,  C22C28/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/10 ,  C23C10/30

    Abstract: The purpose of the present invention is to provide an RFeB system sintered magnet which has a high and uniform level of coercivity over the entirety of the single magnet even if the magnet is comparatively thick. The present invention is an RFeB system sintered magnet in which a heavy rare-earth element R H which is at least one kind of rare-earth element selected from the group of Dy, Tb and Ho is diffused into a base material through the grain boundaries of the same base material made of a sintered compact of an RFeB system magnet containing R L , Fe and B, where R L represents a light rare-earth element which is at least one kind of rare-earth element selected from the group of Nd and Pr, wherein: the size of the RFeB system sintered magnet at a smallest-size portion is greater than 3 mm; the amount of heavy rare-earth element R H contained in the RFeB system sintered magnet divided by the volume of the RFeB system sintered magnet is equal to or greater than 25 mg/cm 3 ; and the difference between a local coercivity at the surface of the smallest-size portion and a local coercivity in the central region of the smallest-size portion is equal to or less than 15 % of the local coercivity at the surface.

    Abstract translation: 本发明的目的在于提供即使磁铁比较厚也能够在整个单一的磁铁上具有高且均匀的矫顽力的RFeB系烧结磁铁。 本发明是一种RFeB系烧结磁体，其中作为选自Dy，Tb和Ho中的至少一种稀土元素的重稀土元素RH通过晶界被扩散到基材中 由含有RL，Fe和B的RFeB系磁体的烧结体构成的相同的基材由RL代表作为选自Nd和Pr中的至少一种稀土元素的轻稀土元素， 其中：在最小尺寸部分处的RFeB系烧结磁体的尺寸大于3mm; RFeB系烧结磁铁中所含的重稀土类元素R H的量除以RFeB系烧结磁铁的体积而成为25mg / cm 3以上， 并且最小尺寸部分的表面处的局部矫顽力与最小尺寸部分的中心区域中的局部矫顽力之间的差等于或小于表面处的局部矫顽力的15％。

    COATING APPARATUS FOR GRAIN-BOUNDARY DIFFUSION TREATMENT
    10.
    发明公开
    COATING APPARATUS FOR GRAIN-BOUNDARY DIFFUSION TREATMENT 有权
    BESCHICHTUNGSVORRICHTUNGFÜREINE KORNGRENZEN-DIFFUSIONSBEARBEITUNG

    公开(公告)号：EP2565885A4

    公开(公告)日：2016-06-22

    申请号：EP11775004

    申请日：2011-04-26

    Applicant: INTERMETALLICS CO LTD

    Inventor： ITATANI OSAMU ,  SAGAWA MASATO

    IPC: H01F41/02 ,  B22F3/24 ,  B41F15/08 ,  H01F1/053 ,  H01F1/08

    CPC classification number: B22F3/24 ,  B22F3/008 ,  B22F7/04 ,  B41F15/0881 ,  B41F15/26 ,  B41F15/36 ,  B41F15/46 ,  C22C33/0278 ,  C23C10/28 ,  H01F1/0577 ,  H01F41/0293

    Abstract: The present invention aims at providing an applicator for grain boundary diffusion process capable of, when performing a grain boundary diffusion process in the production of a NdFeB system sintered magnet, uniformly applying an R H powder without excess or deficiency onto a predetermined surface of a sintered compact with a given thickness and in a given pattern, the applicator being easily automated and being capable of performing an application operation to many sintered compacts. The applicator for grain boundary diffusion process according to the present invention is composed of a work loader 10 and a print head 20, which is provided above the work loader 10. The work loader 10 includes: a base 11 which can be laterally moved; a lift 12 which can be vertically moved with respect to the base 11; a frame 13 which is placed so as to be attachable to and detachable from the lift 12; a tray 14 which is placed so as to be attachable to and detachable from the frame 13; a supporter 15 which is provided on the upper surface of the tray 14; and a magnetic clamp 16 which is vertically movable. The print head 20 includes: a screen 21 in which a passage section 211 is provided; and a squeegee 22 and a backward scraper 23 which are movable while maintaining contact with the upper surface of the screen 21.

    Abstract translation: 本发明的目的在于提供一种用于晶界扩散工艺的涂布器，其能够在制造NdFeB系烧结磁体时进行晶界扩散处理，将没有过剩或不足的RH粉末均匀地施加到烧结体的预定表面上 具有给定的厚度并且在给定的图案中，施加器容易自动化并且能够对许多烧结体进行应用操作。 根据本发明的用于晶界扩散过程的涂布器由设置在作业装载机10上方的作业装载机10和打印头20组成。作业装载机10包括：可横向移动的基座11; 能够相对于基座11垂直移动的升降机构12; 一个框架13，它被放置成能够安装到升降机12上并可从该升降机12拆卸; 托架14，其被布置成可附接到框架13并可从框架13拆卸; 设置在托盘14的上表面上的支撑件15; 以及可垂直移动的磁性夹具16。 打印头20包括：设置有通道部分211的屏幕21; 以及能够在与屏幕21的上表面保持接触的状态下移动的刮板22和后刮板23。

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