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    Forming method and forming apparatus
    1.
    发明授权
    Forming method and forming apparatus 有权
    成型方法和成型装置

    公开(公告)号：US06325965B1

    公开(公告)日：2001-12-04

    申请号：US09431055

    申请日：1999-11-01

    Applicant: Ken Makita ,  Masao Noumi ,  Osamu Yamashita

    Inventor： Ken Makita ,  Masao Noumi ,  Osamu Yamashita

    IPC: B22F100

    Abstract: A forming apparatus comprises a die formed with a through hole for provision of a cavity. A feeder box stored with a raw material powder having an average grain diameter of 0.1 &mgr;m˜500 &mgr;m is positioned above the cavity of the die, and the raw material powder is allowed to fall into the cavity while an inside of the feeder box and an inside of the cavity are each maintained at a pressure not greater than 10 kPa. During the supply of the raw material powder, the feeder box may be vibrated, or the supply may be made via a hose. The raw material powder may be a granulated powder or a rare-earth alloy powder. The raw material powder supplied in the cavity is pressed by an upper punch and a lower punch into a compact.

    Abstract translation: 一种成型设备包括一个形成有用于提供空腔的通孔的模具。 将存储有平均粒径为0.1μm〜500μm的原料粉末的送料盒定位在模具的空腔上方，并且允许原料粉末落入空腔中，同时进料盒内部和 腔体内部各自保持不大于10kPa的压力。 在供应原料粉末期间，供料盒可能振动，或者可以通过软管进行供应。 原料粉末可以是造粒粉末或稀土合金粉末。 在空腔中供给的原料粉末由上冲头和下冲头压入成型体。

    Permanent magnets and R-TM-B based permanent magnets
    2.
    发明授权
    Permanent magnets and R-TM-B based permanent magnets 有权
    永磁体和R-TM-B型永磁体

    公开(公告)号：US06511552B1

    公开(公告)日：2003-01-28

    申请号：US09265669

    申请日：1999-03-10

    Applicant: Ken Makita ,  Osamu Yamashita

    Inventor： Ken Makita ,  Osamu Yamashita

    IPC: H01F1057

    CPC classification number: H01F1/0575 ,  H01F1/055 ,  H01F1/057 ,  H01F41/0253

    Abstract: Permanent magnets in which the ferromagnetic phase is matched with the grain boundary phase, and permanent magnets in which magnetocrystalline anisotropy in the vicinity of the outermost shell of the major phase is equivalent in intensity to that in the inside to suppress nucleation of the inverse magnetic domain. Guideline for designing permanent magnets having high magnetic performance is provided.

    Abstract translation: 铁磁相与晶界相配合的永久磁铁，以及主相外壳附近的磁晶各向异性与内侧的磁晶各向异性相当的永磁体，以抑制反磁畴的成核 。 提供了设计具有高磁性能的永磁体的指导原则。

    Method for producing high silicon steel, and silicon steel
    3.
    发明授权
    Method for producing high silicon steel, and silicon steel 失效
    生产高硅钢，硅钢的方法

    公开(公告)号：US06444049B1

    公开(公告)日：2002-09-03

    申请号：US09463778

    申请日：2000-03-21

    Applicant: Osamu Yamashita ,  Ken Makita ,  Masao Noumi ,  Tsunekazu Saigo

    Inventor： Osamu Yamashita ,  Ken Makita ,  Masao Noumi ,  Tsunekazu Saigo

    IPC: H01F114

    CPC classification number: C22C33/0278 ,  B22F3/162 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C21D8/1233 ,  C21D8/1272 ,  C22C33/0207 ,  C22C33/0257 ,  C22C38/02 ,  B22F3/10 ,  B22F3/18 ,  B22F3/26 ,  B22F3/16 ,  B22F3/24 ,  C23C10/00

    Abstract: Manufacture by rolling silicon steel having a silicon content of 3 wt % or greater and by rolling thin sendust sheet is implemented by powder metallurgical fabrication using powder as the starting raw material, and the average crystal grain size of the sheet-form sintered body or quick-cooled steel sheet is made 300 pm or less, whereby intra-grain slip transformation occurs after slip transformation in the grain boundaries, wherefore cold rolling is rendered possible. In addition, a mixture powder wherein pure iron powder and Fe—Si powder are mixed together in a prescribed proportion is fabricated with a powder metallurgy technique, and an iron-rich phase is caused to remain in the sintered body, whereby cold rolling is possible using the plastic transformation of those crystal grains. Furthermore, when a minute amount of a non-magnetic metal element such as Ti, V, or Al, etc., is added beforehand, it becomes easy to make the iron-rich phase and silicon-rich phase enter into solid solution during annealing, crystal grain growth can be promoted, the magnetic properties of the fabricated steel sheet become roughly equivalent to those of conventional ingot material, and silicon steel sheet exhibiting outstanding magnetic properties can be fabricated.

    Abstract translation: 通过轧制硅含量为3重量％以上的硅钢和通过轧制薄的硅铝箔制造通过使用粉末作为起始原料的粉末冶金制造和片状烧结体的平均晶粒尺寸或快速 冷却后的钢板的厚度为300μm以下，因此在晶界的滑移变形之后发生晶粒内的滑移变形，因此能够进行冷轧。 此外，用粉末冶金技术制造纯铁粉和Fe-Si粉末以规定比例混合在一起的混合粉末，并且使富铁相残留在烧结体中，由此可以进行冷轧 使用这些晶粒的塑性转变。 此外，当预先添加微量的诸如Ti，V或Al等非磁性金属元素时，易于使富铁相和富硅相在退火期间进入固溶体 可以促进晶粒生长，所制造的钢板的磁性能变得与常规锭料的磁特性大致相同，并且可以制造出具有优异磁特性的硅钢片。

    Anisotropic thin-film rare-earth permanent magnet
    4.
    发明授权
    Anisotropic thin-film rare-earth permanent magnet 有权
    各向异性薄膜稀土永磁体

    公开(公告)号：US07285338B2

    公开(公告)日：2007-10-23

    申请号：US10343480

    申请日：2001-07-30

    Applicant: Osamu Yamashita ,  Ken Makita

    Inventor： Osamu Yamashita ,  Ken Makita

    IPC: B32B7/02 ,  B32B15/01 ,  B32B15/04

    CPC classification number: H01F10/3222 ,  B82Y25/00 ,  B82Y40/00 ,  C23C14/00 ,  C23C14/16 ,  H01F10/007 ,  H01F10/126 ,  H01F10/28 ,  H01F10/3227 ,  H01F41/302 ,  Y10T428/1129 ,  Y10T428/115 ,  Y10T428/12861 ,  Y10T428/12868 ,  Y10T428/12875 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/24975 ,  Y10T428/32 ,  Y10T428/325

    Abstract: An anisotropic thin-film rare-earth permanent magnet endowed with high magnetic characteristics by rendering a vapor-phase-grown thin film anisotropic in the layering direction. The atomic laminate units are formed by laminating a monoatomic layer of a rare earth element on a substrate of a non-magnetic material having, a flat smoothness and then by laminating an atomic laminate of a transition metal element having a plurality of monoatomic layers of a transition metal element, so that the atomic laminate units of a characteristic construction are laminated in a plurality of layers. As a result, each atomic laminate of the transition metal element has an easy magnetizable axis in the laminate direction of the monoatomic layers and which are sandwiched between a monoatomic layer of a rare-earth element so that an inverse magnetic domain is suppressed to establish a strong coercive force. Moreover, the content of the transition metal element to the rare-earth metal is raised to improve the residual magnetic flux density drastically.

    Abstract translation: 通过在层叠方向上使气相生长的薄膜各向异性，赋予具有高磁特性的各向异性薄膜稀土永磁体。 原子层压单元是通过在具有平滑光滑性的非磁性材料的基材上层叠稀土元素的单原子层，然后层叠具有多个单原子层的过渡金属元素的原子层叠体而形成的 过渡金属元素，使得特征构造的原子层压单元层叠成多层。 结果，过渡金属元素的每个原子层叠体在单原子层的层叠方向上具有易磁化轴，并且夹在稀土元素的单原子层之间，从而抑制反磁畴以建立 强矫治力。 此外，过渡金属元素向稀土金属的含量升高，从而提高残留磁通密度。

    Permanent magnets and R-TM-B based permanent magnets
    5.
    发明授权
    Permanent magnets and R-TM-B based permanent magnets 有权

    公开(公告)号：US07025837B2

    公开(公告)日：2006-04-11

    申请号：US10256166

    申请日：2002-09-27

    Applicant: Ken Makita ,  Osamu Yamashita

    Inventor： Ken Makita ,  Osamu Yamashita

    IPC: H01F1/057

    CPC classification number: H01F1/0575 ,  H01F1/055 ,  H01F1/057 ,  H01F41/0253

    Abstract: Permanent magnets in which the ferromagnetic phase is matched with the grain boundary phase, and permanent magnets in which magnetocrystalline anisotropy in the vicinity of the outermost shell of the major phase is equivalent in intensity to that in the inside to suppress nucleation of the reverse magnetic domain, more specifically having a magnetocrystalline anisotropy not less than one-half the magnetocrystalline anisotropy of the interiors of the ferromagnetic grains, are disclosed.

    Permanent magnets and R-TM-B based permanent magnets
    6.
    发明授权
    Permanent magnets and R-TM-B based permanent magnets 有权
    永磁体和R-TM-B型永磁体

    公开(公告)号：US06821357B2

    公开(公告)日：2004-11-23

    申请号：US10256193

    申请日：2002-09-27

    Applicant: Ken Makita ,  Osamu Yamashita

    Inventor： Ken Makita ,  Osamu Yamashita

    IPC: H01F1057

    CPC classification number: H01F1/0575 ,  H01F1/055 ,  H01F1/057 ,  H01F41/0253

    Abstract: Permanent magnets in which the ferromagnetic phase is matched with the grain boundary phase, and permanent magnets in which magnetocrystalline anisotropy in the vicinity of the outermost shell of the major phase is equivalent in intensity to that in the inside to suppress nucleation of the reverse magnetic domain, more specifically having a magnetocrystalline anisotropy not less than one-half the magnetocrystalline anisotropy of the interiors of the ferromagnetic grains, are disclosed.

    Abstract translation: 铁磁相与晶界相配合的永久磁铁以及主相外壳附近的磁晶各向异性强度与内侧相同强度的永磁体，以抑制反磁畴的成核 更具体地说，具有不小于铁磁性颗粒内部的磁晶各向异性的一半的磁晶各向异性。

    Rare earth magnet and method for manufacturing the same
    7.
    发明授权
    Rare earth magnet and method for manufacturing the same 有权

    公开(公告)号：US06648984B2

    公开(公告)日：2003-11-18

    申请号：US09961536

    申请日：2001-09-24

    Applicant: Shigeru Takaki ,  Ken Makita

    Inventor： Shigeru Takaki ,  Ken Makita

    IPC: H01F1057

    CPC classification number: H01F1/0577

    Abstract: A compact is produced from an alloy powder for R—Fe—B type rare earth magnets including particles having a size in a range of about 2.0 &mgr;m to about 5.0 &mgr;m as measured by a light scattering method using a Fraunhofer forward scattering in a proportion of approximately 45 vol. % or more and particles having a size larger than about 10 &mgr;m in a proportion of less than about 1 vol. %. The compact is then sintered to obtain a R—Fe—B type rare earth magnet having an average crystal grain size in a range of about 5 &mgr;m to about 7.5 &mgr;m, and an oxygen concentration in a range of about 2.2 at. % to about 3.0 at. %.

    Rare earth-iron-nitrogen system permanent magnet and process for producing the same
    8.
    发明授权
    Rare earth-iron-nitrogen system permanent magnet and process for producing the same 失效
    稀土 - 铁氮系统永磁体及其制造方法

    公开(公告)号：US5425818A

    公开(公告)日：1995-06-20

    申请号：US158564

    申请日：1993-11-29

    Applicant: Satoshi Hirosawa ,  Takashi Ikegami ,  Ken Makita ,  Tsutomu Mashimo

    Inventor： Satoshi Hirosawa ,  Takashi Ikegami ,  Ken Makita ,  Tsutomu Mashimo

    IPC: H01F1/059

    CPC classification number: H01F1/0593

    Abstract: A densified high performance rare earth-iron-nitrogen permanent magnet obtained from a powder of a Th.sub.2 Zn.sub.17 compound containing nitrogen at interlattice sites, without using autogeneous sintering and yet preventing decomposition and/or denitrification from occurring. The process for producing the same need not necessarily use a binder, and it comprises compaction molding, or charging while applying a magnetic field, a powder of a nitrogen intrusion T--R--N compound having a specified composition and a Th.sub.2 Zn.sub.17 crystal structure, and applying thereto shock compression at a drive pressure of from 10 to 25 GPa as reduced to an equivalent drive pressure in an iron capsule.

    Abstract translation: 一种致密化的高性能稀土 - 铁 - 氮永磁体，其由在晶间位置含有氮的Th2Zn17化合物的粉末获得，而不使用自发烧结，并且防止发生分解和/或反硝化。 其制造方法不一定使用粘合剂，它包括压实成型或施加磁场充电，具有特定组成的氮侵入TRN化合物粉末和Th2Zn17晶体结构，并施加于其上冲击压缩 在10至25GPa的驱动压力下降低到铁胶囊中的等效驱动压力。

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