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    Cast alloy used for production of rare earth magnet and method for producing cast alloy and magnet
    3.
    发明授权
    Cast alloy used for production of rare earth magnet and method for producing cast alloy and magnet 失效
    用于生产稀土磁体的铸造合金和用于生产铸造合金和磁体的方法

    公开(公告)号：US5908513A

    公开(公告)日：1999-06-01

    申请号：US838784

    申请日：1997-04-10

    申请人： Shiro Sasaki ,  Hiroshi Hasegawa ,  Yoichi Hirose

    发明人： Shiro Sasaki ,  Hiroshi Hasegawa ,  Yoichi Hirose

    IPC分类号： C22C1/04 ,  C22C28/00 ,  H01F1/057

    CPC分类号： H01F1/057 ,  C22C1/0441 ,  C22C28/00 ,  H01F1/0571 ,  H01F1/0577 ,  B22F2009/041 ,  B22F2998/00 ,  B22F2998/10

    摘要： The magnetic properties of rare earth magnet are improved by means of forming a novel structure of the cast alloy used for the production of a rare earth magnet, which contains from 27 to 34% by weight of at least one rare earth element (R) including yttrium, from 07 to 1.4% by weight of boron, and the balance being essentially iron and, occasionally any other transition element, and comprises an R.sub.2 T.sub.14 B phase, an R-rich phase and optionally at least one ternary phase except for the R.sub.2 T.sub.14 B phase and the R-rich phase. The novel structure is that the volume fraction (V) in percentage of said R.sub.2 T.sub.14 B phase and said at least one ternary phase is more than 138-1.6r (with the proviso that r is the content of R), the average grain size of the R.sub.2 T.sub.14 B phases is from 10 to 100 .mu.m and, further, the average spacing between the adjacent R-rich phases is from 3 to 15 .mu.m. The novel structure can be formed by by means of feeding alloy melt onto a rotary casting roll, cooling in a temperature range of from melting point to 1000.degree. C. at a cooling rate of 300.degree. C. per second or more, and further cooling in a temperature range of from 800 to 600.degree. C. at a cooling rate of 1.degree. C./second or less.

    摘要翻译： 通过形成用于制备稀土磁体的铸造合金的新型结构，稀土类磁体的磁特性得到改善，该稀土类磁铁含有27〜34重量％的至少一种稀土元素（R），包括 钇，从07至1.4重量％的硼，余量基本上为铁，偶尔为任何其它过渡元素，并且包含R2T14B相，富R相和任选的至少一个三元相，除了R2T14B相和 富R相。 新结构是所述R2T14B相和所述至少一个三元相的百分比的体积分数（V）大于138-1.6r（条件是r是R的含量），平均粒径 R2T14B相为10〜100μm，相邻的富R相之间的平均间隔为3〜15μm。 该新型结构可以通过将合金熔体供给到旋转铸辊上，以300℃/秒或更高的冷却速度在熔点为1000℃的温度范围内冷却，并进一步冷却 在800〜600℃的温度范围内，以1℃/秒以下的冷却速度。

    Alloy used for production of a rare-earth magnet and method for producing the same
    6.
    发明授权
    Alloy used for production of a rare-earth magnet and method for producing the same 失效
    用于生产稀土磁体的合金及其制造方法

    公开(公告)号：US6045629A

    公开(公告)日：2000-04-04

    申请号：US18050

    申请日：1998-02-03

    申请人： Hiroshi Hasegawa ,  Shiro Sasaki ,  Yoichi Hirose ,  Shinya Fujito ,  Koichi Yajima

    发明人： Hiroshi Hasegawa ,  Shiro Sasaki ,  Yoichi Hirose ,  Shinya Fujito ,  Koichi Yajima

    IPC分类号： B22D13/02 ,  B22D13/10 ,  B22F1/00 ,  C22C1/04 ,  C22C33/02 ,  C22C38/00 ,  H01F1/053 ,  H01F1/057 ,  H01F1/055

    CPC分类号： C22C1/0441 ,  H01F1/057 ,  H01F1/0571 ,  B22F2009/041 ,  B22F2998/10 ,  B22F2999/00

    摘要： An alloy used for the production of a rare-earth magnet alloy, particularly the boundary-phase alloy in the two-alloy method is provided to improve the crushability.The alloy consists of (a) from 35 to 60% of Nd, Dy and/or Pr, 1% or less of B, and the balance being Fe, or (b) from 35 to 60% of Nd, Dy and/or Pr, 1% or less of B, and at least one element selected from the group consisting of 35% by weight or less of Co, 4% by weight or less of Cu, 3% by weight or less of Al and 3% by weight or less of Ga, and the balance being Fe. The total volume fraction of R.sub.2 Fe.sub.17 and R.sub.2 Fe.sub.14 B phases (Fe may be replaced with Cu, Co, Al or Ga) is 25% or more in the alloy. The average size of each of the R.sub.2 Fe.sub.17 and R.sub.2 Fe.sub.14 B phases is 20 .mu.m or less. The alloy can be produced by a centrifugal casting at an average accumulating rate of melt at 0.1 cm/second or less.

    摘要翻译： 提供了用于生产稀土类磁体合金的合金，特别是双合金方法中的边界相合金，以提高粉碎性。 该合金由（a）35〜60％的Nd，Dy和/或Pr，1％以下的B，余量为Fe，（b）35〜60％的Nd，Dy和/ Pr，1％以下的B，以及选自Co，35重量％以下的Co，4重量％以下的Cu，3重量％以下的Al和3重量％以下的至少一种元素， 重量或更少的Ga，余量为Fe。 在合金中，R2Fe17和R2Fe14B相（Fe可以用Cu，Co，Al或Ga代替）的总体积分数为25％以上。 R2Fe17和R2Fe14B相的平均尺寸为20μm以下。 该合金可以以0.1cm /秒以下的熔融物的平均累积速度通过离心铸造来制造。

    Method for producing cast alloy and magnet
    7.
    发明授权
    Method for producing cast alloy and magnet 失效
    铸造合金和磁铁的生产方法

    公开(公告)号：US5963774A

    公开(公告)日：1999-10-05

    申请号：US65564

    申请日：1998-04-24

    申请人： Shiro Sasaki ,  Hiroshi Hasegawa ,  Yoichi Hirose

    发明人： Shiro Sasaki ,  Hiroshi Hasegawa ,  Yoichi Hirose

    IPC分类号： C22C1/04 ,  C22C28/00 ,  H01F1/057 ,  B22F3/12

    CPC分类号： H01F1/057 ,  C22C1/0441 ,  C22C28/00 ,  H01F1/0571 ,  H01F1/0577 ,  B22F2009/041 ,  B22F2998/00 ,  B22F2998/10

    摘要： The magnetic properties of rare earth magnet are improved by means of forming a novel structure of the cast alloy used for the production of a rare earth magnet, which contains from 27 to 34% by weight of at least one rare earth element (R) including yttrium, from 0.7 to 1.4% by weight of boron, and the balance being essentially iron and, occasionally any other transition element, and comprises an R.sub.2 T.sub.14 B phase, an R-rich phase and optionally at least one ternary phase except for the R.sub.2 T.sub.14 B phase and the R-rich phase. The novel structure is that the volume fraction (V) in percentage of said R.sub.2 T.sub.14 B phase and said at least one ternary phase is more than 138-1.6r (with the proviso that r is the content of R), the average grain size of the R.sub.2 T.sub.14 B phases is from 10 to 100 .mu.m and, further, the average spacing between the adjacent R-rich phases is from 3 to 15 .mu.m. The novel structure can be formed by by means of feeding alloy melt onto a rotary casting roll, cooling in a temperature range of from melting point to 1000.degree. C. at a cooling rate of 300.degree. C. per second or more, and further cooling in a temperature range of from 800 to 600.degree. C. at a cooling rate of 1.degree. C./second or less.

    摘要翻译： 通过形成用于制备稀土磁体的铸造合金的新型结构，稀土类磁体的磁特性得到改善，该稀土类磁铁含有27〜34重量％的至少一种稀土元素（R），包括 钇，0.7至1.4重量％的硼，余量基本上为铁，偶尔为任何其它过渡元素，并且包括R2T14B相，富R相和任选的至少一个三元相，除了R2T14B相和 富R相。 新结构是所述R2T14B相和所述至少一个三元相的百分比的体积分数（V）大于138-1.6r（条件是r是R的含量），平均粒径 R2T14B相为10〜100μm，相邻的富R相之间的平均间隔为3〜15μm。 该新型结构可以通过将合金熔体供给到旋转铸辊上，以300℃/秒或更高的冷却速度在熔点为1000℃的温度范围内冷却，并进一步冷却 在800〜600℃的温度范围内，以1℃/秒以下的冷却速度。

    Refractory material for casting a rare-earth alloy and its production method as well as method for casting the rare-earth alloys
    9.
    发明申请
    Refractory material for casting a rare-earth alloy and its production method as well as method for casting the rare-earth alloys 审中-公开
    用于铸造稀土合金的耐火材料及其制备方法以及铸造稀土合金的方法

    公开(公告)号：US20060033247A1

    公开(公告)日：2006-02-16

    申请号：US11201296

    申请日：2005-08-11

    申请人： Hiroshi Hasegawa ,  Nobuhiko Kawamura ,  Shiro Sasaki ,  Yoichi Hirose

    发明人： Hiroshi Hasegawa ,  Nobuhiko Kawamura ,  Shiro Sasaki ,  Yoichi Hirose

    IPC分类号： C21B7/04

    CPC分类号： F27B5/04 ,  B22D13/102 ,  B22D41/02 ,  C04B35/10 ,  C04B35/48 ,  C21C5/44 ,  F27B5/13 ,  F27D3/145

    摘要： Rare-earth alloy is cast into a sheet (6) or the like by using a tundish (3, 13). The refractory material of the tundish used for casting does not necessitate preheating for improving the flowability of the melt (2). The refractory material used essentially consists of 70 wt % or more of Al2O3 and 30 wt % or less of SiO2, or 70 wt % or more of ZrO2 and 30 wt % or less of one or more of Y2O3, Ce2O3, CaO, MgO, Al2O3, TiO2 and SiO2. The refractory material has 1 g/cm3 or less of bulk density, has 0.5 kcal/(mh° C.) or less of thermal conductivity in the temperature range of from 1200 to 1400° C., and has 0.5 wt % or less of ratio of ignition weight-loss under the heating condition of 1400° C. for 1 hour.

    摘要翻译： 通过使用中间包（3,13）将稀土合金铸造成板（6）等。 用于铸造的中间包的耐火材料不需要预热以改善熔体（2）的流动性。 使用的耐火材料基本上由70重量％以上的Al 2 O 3 3和30重量％以下的SiO 2或70 重量％以上的ZrO 2 2和30重量％以下的Y 2 O 3，Ce 2， CaO，MgO，Al 2 O 3，TiO 2和SiO 2， 2 。 耐火材料具有1g / cm 3或更小的堆积密度，在1200至1400℃的温度范围内具有0.5kcal /（mh℃）或更低的热导率， 并且在1400℃的加热条件下具有0.5重量％以下的点火失重比率1小时。

    R-T-B based permanent magnet material alloy and R-T-B based permanent magnet
    10.
    发明申请
    R-T-B based permanent magnet material alloy and R-T-B based permanent magnet 审中-公开
    R-T-B型永磁材料合金和R-T-B型永磁体

    公开(公告)号：US20050098239A1

    公开(公告)日：2005-05-12

    申请号：US10958653

    申请日：2004-10-06

    申请人： Futoshi Kuniyoshi ,  Yuji Kaneko ,  Hiroshi Hasegawa ,  Shiro Sasaki

    发明人： Futoshi Kuniyoshi ,  Yuji Kaneko ,  Hiroshi Hasegawa ,  Shiro Sasaki

    IPC分类号： H01F1/057

    CPC分类号： H01F1/0571 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16

    摘要： An R-T-B based permanent magnet material alloy according to the present invention is an alloy in the shape of a thin plate including R2T14B columnar crystals and R-rich phases (where R is at least one of the rare-earth elements including Y, T is Fe with or without at least one nonferrous transition metal element, and B is boron with or without carbon). In a structure of the alloy as viewed on an arbitrary cross section including a normal to the thin plate, the ratio of the combined area of some of the R-rich phases, which have aspect ratios of 10 or more and the major axes of which define angles of 90±30 degrees with respect to the surface of the thin plate, to the overall area of the R-rich phases included in the alloy is at least 30%.

    摘要翻译： 根据本发明的基于RTB的永磁材料合金是包括R 2 Ti 14 B柱状晶体和富R相的薄板形状的合金（ 其中R是包括Y的至少一种稀土元素，T是具有或不具有至少一个非铁过渡金属元素的Fe，B是具有或不具有碳的硼）。 在包含平板法线的任意截面观察合金的结构中，具有10个以上的长宽比的长宽比为10以上的部分富R相的部分的合并面积的比例 相对于薄板的表面定义90±30度的角度，合金中包含的富R相的总面积为至少30％。