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    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
    2.
    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）。

    R-T-B RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING THE SAME
    3.
    发明申请
    R-T-B RARE EARTH SINTERED MAGNET AND METHOD OF MANUFACTURING THE SAME 有权
    R-T-B稀土烧结磁体及其制造方法

    公开(公告)号：US20140314612A1

    公开(公告)日：2014-10-23

    申请号：US14257512

    申请日：2014-04-21

    Applicant: SHOWA DENKO K.K.

    Inventor： Kenichiro NAKAJIMA ,  Akifumi MURAOKA ,  Takashi YAMAZAKI

    IPC: H01F1/053 ,  H01F41/02

    CPC classification number: H01F1/0536 ,  B22F2998/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0293 ,  B22F3/02 ,  B22F3/10

    Abstract: A method of manufacturing an R-T-B rare earth sintered magnet includes a process of disposing and sintering a compact of a first alloy powder and an alloy material of a second alloy in a chamber of a sintering furnace. The first alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The first alloy contains 11 at % to 17 at % of R, 4.5 at % to 6 at % of B, 0 at % to 1.6 at % of M, and T as the balance, and Dy content in all of the rare earth elements is 0 at % to 29 at %. The second alloy consists of R which represents a rare earth element, T which represents a transition metal essentially containing Fe, a metal element M which represents Al and/or Ga, B, Cu, and inevitable impurities. The second alloy contains 11 at % to 20 at % of R, 4.5 at % to 6 at % of B, and 0 at % to 1.6 at % of M, and T as the balance, and Dy content in all of the rare earth elements is 0 at % to 29 at %.

    Abstract translation: R-T-B系稀土类烧结磁体的制造方法包括在烧结炉的室内配置并烧结第一合金粉末和第二合金的合金材料的坯料的工序。 第一合金由代表稀土元素的R表示，T表示基本上含有Fe的过渡金属，代表Al和/或Ga，B，Cu和不可避免的杂质的金属元素M. 第一合金含有11原子％至17原子％的R，4.5原子％至6原子％的B，0原子％至1.6原子％的M，T为余量，所有稀土元素中的Dy含量 为0 at％至29at％。 第二合金由代表稀土元素的R表示，T表示基本上含有Fe的过渡金属，代表Al和/或Ga，B，Cu和不可避免的杂质的金属元素M. 第二合金含有11原子％〜20原子％的R，4.5原子％〜6原子％的B，0为0原子％〜1.6原子％的M，余量为T，所有稀土中的Dy含量 元素为0 at％至29 at％。

    R-T-B RARE EARTH SINTERED MAGNET, ALLOY FOR R-T-B RARE EARTH SINTERED MAGNET, AND METHOD OF MANUFACTURING THE SAME
    4.
    发明申请
    R-T-B RARE EARTH SINTERED MAGNET, ALLOY FOR R-T-B RARE EARTH SINTERED MAGNET, AND METHOD OF MANUFACTURING THE SAME 有权
    R-T-B稀土焊接磁铁，用于R-T-B稀土烧结磁体的合金及其制造方法

    公开(公告)号：US20140191831A1

    公开(公告)日：2014-07-10

    申请号：US14146098

    申请日：2014-01-02

    Applicant: Showa Denko K.K.

    Inventor： Takashi YAMAZAKI ,  Kenichiro NAKAJIMA

    IPC: H01F1/40 ,  H01F41/02

    CPC classification number: H01F1/40 ,  B22F1/0055 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0571 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0273 ,  H01F41/0293 ,  B22F1/0059 ,  B22F3/03 ,  B22F3/10 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2009/048 ,  B22F2009/049 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/05

    Abstract: An R-T-B rare earth sintered magnet contains R which represents a rare earth element; T which represents a transition metal essentially containing Fe; a metal element M which represents Al and/or Ga; B; Cu; and inevitable impurities the R-T-B rare earth sintered magnet including 13.4 to 17 at % of R, 4.5 to 5.5 at % of B, and 0.1 to 2.0 at % of M, and T as the balance; in which the R-T-B rare earth sintered magnet is formed of a sintered body which includes a main phase composed of R2Fe14B and a grain boundary phase including a larger amount of R than the main phase; in which the magnetization direction of the main phase is a c-axis direction, in which crystal grains of the main phase have one of an elliptical shape and an oval shape extended in such a direction so as to cross the c-axis direction; and in which the grain boundary phase includes an R-rich phase in which the total atomic concentration of the rare earth elements is 70 at % or greater and a transition metal-rich phase in which the total atomic concentration of the rare earth elements is 25 to 35 at %.

    Abstract translation: R-T-B稀土烧结磁体包含表示稀土元素的R， T代表基本上含有Fe的过渡金属; 表示Al和/或Ga的金属元素M; B; 铜 和R-T-B系稀土类烧结磁体的不可避免的杂质，其中R为13.4〜17原子％，B为4.5〜5.5原子％，M为0.1〜2.0原子％，余量为T; 其中R-T-B稀土烧结磁体由包括由R2Fe14B组成的主相和包含比主相大的R的晶界相的烧结体形成; 其中主相的磁化方向是c轴方向，其中主相的晶粒具有椭圆形和椭圆形之一，沿着与c轴方向交叉的方向延伸; 并且其中晶界相包括稀土元素的总原子浓度为70原子％以上的富R相，以及稀土元素的总原子浓度为25的过渡金属富集相 至35原子％。

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