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    Preparation of permanent magnet
    1.
    发明授权
    Preparation of permanent magnet 失效
    永磁体的制备

    公开(公告)号：US5595608A

    公开(公告)日：1997-01-21

    申请号：US333982

    申请日：1994-11-02

    申请人： Katashi Takebuchi ,  Shinya Fujito ,  Shinya Hashimoto ,  Koichi Yajima

    发明人： Katashi Takebuchi ,  Shinya Fujito ,  Shinya Hashimoto ,  Koichi Yajima

    IPC分类号： H01F1/057 ,  H01F1/03

    CPC分类号： H01F1/0577

    摘要： A permanent magnet which contains R, T and B as main ingredients wherein R is Y or a rare earth element and T is Fe or Fe and Co and has a primary phase of R.sub.2 T.sub.14 B is produced by compacting a mixture of 60 to 95 wt % of a primary phase-forming master alloy and a grain boundary phase-forming master alloy both in powder form and sintering the compact. The primary phase-forming master alloy has columnar crystal grains of R.sub.2 T.sub.14 B with a mean grain size of 3-50 .mu.m and grain boundaries of an R rich phase and contains 26-32 wt % of R. The grain boundary phase-forming master alloy is a crystalline alloy consisting essentially of 32-60 wt % of R and the balance of Co or Co and Fe. In anther form, a permanent magnet which contains R, T and B as main ingredients wherein R is yttrium or a rare earth element, T is Fe or Fe+Co/Ni and has a primary phase of R.sub.2 T.sub.14 B is produced by compacting a mixture of a primary phase-forming master alloy and a grain boundary-forming master alloy both in powder form and sintering the compact. The primary phase-forming master alloy has a primary phase of R.sub.2 T.sub.14 B and grain boundaries of an R rich phase. The grain boundary-forming master alloy contains 40-65 wt % of R, 30-60 wt % of Fe, Co or Ni and 1-12 wt % of Sn, In or Ga.

    摘要翻译： 含有R，T和B作为主要成分的永磁体，其中R是Y或稀土元素，T是Fe或Fe和Co，并且具有R2T14B的初相是通过将60至95重量％的 主要成型母合金和晶界相成形母合金粉末形式并烧结成型。 主相成形母合金具有R2T14B的平均晶粒尺寸为3-50μm的柱状晶粒和富R相的晶界，并且含有26-32wt％的R。晶界相形成母合金 是基本上由32-60重量％的R和余量的Co或Co和Fe组成的结晶合金。 在花药形式中，含有R，T和B作为主要成分的永磁体，其中R是钇或稀土元素，T是Fe或Fe + Co / Ni，并且具有R2T14B的初相通过压制 主要成型母合金和晶界形成母合金，均为粉末形式并烧结成型。 主相成型母合金具有R2T14B的初相和富R相的晶界。 晶界形成母合金含有40-65重量％的R，30-60重量％的Fe，Co或Ni和1-12重量％的Sn，In或Ga。

    Alloy used for production of a rare-earth magnet and method for producing the same
    2.
    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。

    Alloy used for production of a rare-earth magnet and method for producing the same
    3.
    发明授权
    Alloy used for production of a rare-earth magnet and method for producing the same 有权
    用于生产稀土磁体的合金及其制造方法

    公开(公告)号：US06328825B1

    公开(公告)日：2001-12-11

    申请号：US09314164

    申请日：1999-05-19

    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： B22D1300

    CPC分类号： H01F1/0571 ,  H01F1/0551

    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, and the balance being Fe, or (b) from 35 to 60% of Nd, Dy and/or Pr, 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 volume fraction of R2Fe17 phase (Fe may be replaced with Cu, Co, Al or Ga) is 25% or more in the alloy and the average size of an R2Fe17 phase is 20 &mgr;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，余量为Fe，或（b）35〜60％的Nd，Dy和/或Pr，以及至少一种元素 选自Co占35重量％或更少，Cu为4重量％以下，Al为3重量％以下，Ga为3重量％以下，余量为Fe。 在合金中，R2Fe17相（Fe可以被Cu，Co，Al或Ga代替）的体积分数为25％以上，R2Fe17相的平均粒径为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。

    Alloy used for production of a rare-earth magnet and method for producing the same
    4.
    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：US5948179A

    公开(公告)日：1999-09-07

    申请号：US968005

    申请日：1997-11-12

    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 ,  C22C38/00 ,  H01F1/055 ,  H01F1/057 ,  H01F1/06

    CPC分类号： H01F1/0551 ,  H01F1/055 ,  H01F1/0571

    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, and the balance being Fe, or (b) from 35 to 60% of Nd, Dy and/or Pr, 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 volume fraction of R.sub.2 Fe.sub.17 phase (Fe may be replaced with Cu, Co, Al or Ga) is 25% or more in the alloy and the average size of an R.sub.2 Fe.sub.17 phase 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，余量为Fe，或（b）35〜60％的Nd，Dy和/或Pr，以及至少一种元素 选自Co占35重量％或更少，Cu为4重量％以下，Al为3重量％以下，Ga为3重量％以下，余量为Fe。 在合金中，R2Fe17相的体积分数（Fe可以被Cu，Co，Al或Ga代替）为25％以上，R2Fe17相的平均粒径为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。