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    Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets
    1.
    发明授权
    Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets 失效
    用于压实生产稀土铁烧结永磁体的粉末混合物

    公开(公告)号：US5486224A

    公开(公告)日：1996-01-23

    申请号：US364315

    申请日：1994-12-27

    申请人： Yoshihisa Kishimoto ,  Nobushige Hiraishi ,  Wataru Takahashi ,  Masakazu Ohkita ,  Naoyuki Ishigaki ,  Yutaka Matsuura

    发明人： Yoshihisa Kishimoto ,  Nobushige Hiraishi ,  Wataru Takahashi ,  Masakazu Ohkita ,  Naoyuki Ishigaki ,  Yutaka Matsuura

    IPC分类号： C22C1/04 ,  H01F1/057 ,  B22F1/00

    CPC分类号： H01F1/0577 ,  C22C1/0441 ,  Y10T428/2991

    摘要： To a fine R--Fe--B alloy powder comprised predominantly of 10-30 atomic % of R (wherein R stands for at least one element selected from rare earth elements including yttrium), 2-28 atomic % of B, and 65-82 atomic % of Fe in which up to 50 atomic % of Fe may be replaced by Co, at least one boric acid ester compound such as tributyl borate is added as a lubricant in a proportion of 0.01%-2% by weight and mixed uniformly before, during, or after fine grinding of the alloy powder. The resulting powder mixture is compacted by compression molding in a magnetic field and the green compacts are sintered and aged. Compression molding can be performed continuously without need of mold lubrication, and the resulting magnets have improved magnet properties with respect to residual flux density, maximum energy product, and intrinsic coercive force.

    摘要翻译： 对于主要由10-30原子％的R（其中R表示选自包括钇的稀土元素中的至少一种元素），B-28的2-28原子％和65-82的细R-Fe-B合金粉末 其中至多50原子％的Fe可被Co替代的Fe的原子％，至少一种硼酸酯化合物如硼酸三丁酯作为润滑剂以0.01重量％-2重量％的比例加入并在 ，在合金粉末的精细研磨期间或之后。 所得粉末混合物通过在磁场中的压缩成型而压实，并将生坯压坯烧结和老化。 压缩成型可以连续进行而不需要模具润滑，并且所得到的磁体相对于剩余磁通密度，最大能量积和固有矫顽力具有改进的磁体性质。

    Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets
    2.
    发明授权
    Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets 失效
    用于压实生产稀土铁烧结永磁体的粉末混合物

    公开(公告)号：US5527504A

    公开(公告)日：1996-06-18

    申请号：US437373

    申请日：1995-05-09

    申请人： Yoshihisa Kishimoto ,  Nobushige Hiraishi ,  Wataru Takahashi ,  Masakazu Ohkita ,  Naoyuki Ishigaki ,  Yutaka Matsuura

    发明人： Yoshihisa Kishimoto ,  Nobushige Hiraishi ,  Wataru Takahashi ,  Masakazu Ohkita ,  Naoyuki Ishigaki ,  Yutaka Matsuura

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

    CPC分类号： H01F1/0577 ,  C22C1/0441 ,  Y10T428/2991

    摘要： To a fine R-Fe-B alloy powder comprised predominantly of 10-30 atomic % of R (wherein R stands for at least one elements selected from rare earth elements including yttrium), 2-28 atomic % of B, and 65-82 atomic % of Fe in which up to 50 atomic % of Fe may be replaced by Co, at least one boric acid ester compound such as tributyl borate is added as a lubricant in a proportion of 0.01%-2% by weight and mixed uniformly before, during, or after fine grinding of the alloy powder. The resulting powder mixture is compacted by compression molding in a magnetic field and the green compacts are sintered and aged. Compression molding can be performed continuously without need of mold lubrication, and the resulting magnets have improved magnet properties with respect to residual flux density, maximum energy product, and intrinsic coercive force.

    摘要翻译： 对于主要由10-30原子％的R（其中R代表选自包括钇在内的稀土元素中的至少一种元素），2-28原子％的B和65-82的细R-Fe-B合金粉末 其中至多50原子％的Fe可被Co替代的Fe的原子％，至少一种硼酸酯化合物如硼酸三丁酯作为润滑剂以0.01重量％-2重量％的比例加入，并在 ，在合金粉末的精细研磨期间或之后。 所得粉末混合物通过在磁场中的压缩成型而压实，并将生坯压坯烧结和老化。 压缩成型可以连续进行而不需要模具润滑，并且所得到的磁体相对于剩余磁通密度，最大能量积和固有矫顽力具有改进的磁体性质。

    Method for preparing rare-earth system sintered magnet
    3.
    发明授权
    Method for preparing rare-earth system sintered magnet 失效
    制备稀土系烧结磁体的方法

    公开(公告)号：US06187259B1

    公开(公告)日：2001-02-13

    申请号：US08793368

    申请日：1997-03-19

    申请人： Osamu Yamashita ,  Yoshihisa Kishimoto ,  Wataru Takahashi ,  Nobushige Hiraishi ,  Yoshiyuki Hashimasa ,  Masakazu Ohkita

    发明人： Osamu Yamashita ,  Yoshihisa Kishimoto ,  Wataru Takahashi ,  Nobushige Hiraishi ,  Yoshiyuki Hashimasa ,  Masakazu Ohkita

    IPC分类号： C22C3836

    CPC分类号： H01F1/0557 ,  H01F1/0577 ,  H01F41/0273

    摘要： The object of the present invention is to provide rare-earth system sintered magnets such as R—Fe—B system or R—Co system having excellent magnetic properties, unique configuration of a small size, thin wall thickness and intricate geometry. With the method for preparing the present invention, a granulation of alloy powders can be achieved easily, a chemical reaction between rare-earth system and binder substances can be suppressed, so that the residual oxygen and carbon levels in the sintered products can be reduced. Moreover, by this production method, the flowability and lubricant capability during the forming process can be improved. The dimension accuracy and productivity are also enhanced. A certain type of binder is added to rare-earth alloy powders and kneaded into a slurry state. The slurry is then formed into granulated powders by spray-dryer equipment. The thus granulated powders are molded, and sintered through a powder metallurgy technique.

    摘要翻译： 本发明的目的是提供具有优异的磁特性的R-Fe-B系或R-Co系稀土系烧结磁体，其尺寸小，壁厚小，复杂几何形状独特。 通过制备本发明的方法，可以容易地实现合金粉末的造粒，可以抑制稀土系和粘合剂物质之间的化学反应，从而可以降低烧结产品中的残留氧和碳含量。 此外，通过该制造方法，可以提高成形时的流动性和润滑性。 尺寸精度和生产率也得到提高。 将一定类型的粘合剂加入到稀土合金粉末中并捏合成淤浆状态。 然后通过喷雾干燥器设备将浆料形成成粒状粉末。 将如此制粒的粉末成型，并通过粉末冶金技术进行烧结。