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    R-T-B-C BASED RARE EARTH MAGNETIC POWDER AND BONDED MAGNET
    1.
    发明公开
    R-T-B-C BASED RARE EARTH MAGNETIC POWDER AND BONDED MAGNET 有权
    磁性稀土粉末ON R-T-B-C-base和粘结磁铁

    公开(公告)号：EP1411532A4

    公开(公告)日：2008-10-29

    申请号：EP01945740

    申请日：2001-06-29

    申请人： HITACHI METALS LTD

    发明人： TOMIZAWA HIROYUKI ,  KANEKO YUJI

    IPC分类号： B22F9/10 ,  H01F1/058 ,  B22F1/00 ,  B22F8/00 ,  C22C33/02 ,  C22C38/00 ,  H01F1/04 ,  H01F1/053 ,  H01F1/057 ,  H01F1/06 ,  H01F1/08

    CPC分类号： H01F1/058 ,  H01F1/0578 ,  H01F41/0266

    摘要： A method for preparing a R−T−B−C based rare earth alloy magnetic material, which comprises a step of quenching a melt of a R−T−B−C based rare earth alloy, wherein R represents at least one of the rare earth elements including Y, T represents a mixture of transition metals containing iron as a main component, B is boron and C is carbon, to form a rapidly solidified alloy, and a heat treatment step of heating the rapidly solidified alloy to allow crystallization to proceed, wherein a first compound phase having a R 2 Fe 14 B type crystal structure and a second compound phase having a diffraction peak at a position corresponding to a lattice plane interval (d) of from 0.295 nm to 0.300 nm (approximately 2θ = 30˚) are formed in the heat treatment step, and the intensity ratio of the above diffraction peak of the second compound phase to the diffraction peak ascribed to (410) plane of the R 2 Fe 14 B type crystal structure is 10 % or more; and a R−T−B−C based rare earth alloy magnetic material prepared by the method. The rare earth alloy magnetic material contains carbon (C) as an essential element and also has excellent magnetic characteristics and thus can be recycled with ease and at a low cost.

    R-T-CU-MN-B TYPE SINTERED MAGNET
    2.
    发明公开
    R-T-CU-MN-B TYPE SINTERED MAGNET 有权
    SINTERMAGNET DES R-T-CU-MN-B-TYPS

    公开(公告)号：EP2302646A4

    公开(公告)日：2017-05-03

    申请号：EP09762274

    申请日：2009-06-11

    申请人： HITACHI METALS LTD

    发明人： KUNIYOSHI FUTOSHI ,  ISHII RINTARO ,  TOMIZAWA HIROYUKI

    IPC分类号： H01F1/08 ,  H01F1/057 ,  H01F41/02

    CPC分类号： H01F1/0577 ,  H01F41/0266

    摘要： An R-T-Cu-Mn-B based sintered magnet includes: 12.0 at% to 15.0 at% of R, which is at least one of the rare-earth elements that include Y and of which at least 50 at% is Pr and/or Nd; 5.5 at% to 6.5 at% of B; 0.08 at% to 0.35 at% of Cu; 0.04 at% to less than 0.2 at% of Mn; at most 2 at% (including 0 at%) of M, which is one, two, or more elements that are selected from the group consisting of Al, Ti, V, Cr, Ni, Zn, Ga, Zr, Nb, Mo, Ag, In, Sn, Hf, Ta, W, Au, Pb and Bi; and T as the balance, which is either Fe alone or Fe and Co and of which at most 20 at% is Co if T includes both Fe and Co.

    摘要翻译： 本发明的RT-Cu-Mn-B系烧结磁铁包含：R为12.0〜15.0原子％的至少一种含Y的稀土元素，其中至少50原子％为Pr和/或 钕; B的5.5原子％至6.5原子％; 0.08原子％至0.35原子％的铜; Mn：0.04原子％以上且小于0.2原子％ 最多2原子％（包括0原子％）的M，其是选自Al，Ti，V，Cr，Ni，Zn，Ga，Zr，Nb，Mo中的一种，两种或更多种元素 ，Ag，In，Sn，Hf，Ta，W，Au，Pb和Bi; 和T作为余量，其单独为Fe或Fe和Co，并且如果T包括Fe和Co，则其中至多20原子％为Co。

    R-T-B SINTERED MAGNET
    6.
    发明公开
    R-T-B SINTERED MAGNET 有权
    R-T-B-SINTERMAGNET

    公开(公告)号：EP2034493A4

    公开(公告)日：2009-07-22

    申请号：EP07742819

    申请日：2007-05-02

    申请人： HITACHI METALS LTD

    发明人： TOMIZAWA HIROYUKI

    IPC分类号： H01F1/057 ,  C22C38/00 ,  H01F1/08

    CPC分类号： H01F1/0577 ,  C22C38/005 ,  C22C38/04 ,  C22C38/06

    摘要： R-T-B sintered magnet comprising 12 to 17 atom% rare earth element (R), 5.0 to 8.0 atom% boron (B), 0.02 to 0.3 atom% Mn and the balance transition metal (T). The rare earth element (R) is at least one member selected from among rare earth elements including Y(yttrium), wherein 0.2 to 10 atom% Pr is contained. The element of transition metal (T) contains Fe as a main component.

    摘要翻译： 包含12-17原子％稀土元素（R），5.0-8.0原子％硼（B），0.02-0.3原子％Mn和余量过渡金属（T）的R-T-B烧结磁体。 稀土元素（R）是选自包含Y（钇）的稀土元素中的至少一种元素，其中包含0.2至10原子％的Pr。 过渡金属元素（T）含有Fe作为主要成分。