SINTERED R-Fe-B PERMANENT MAGNET AND ITS PRODUCTION METHOD
    1.
    发明申请
    SINTERED R-Fe-B PERMANENT MAGNET AND ITS PRODUCTION METHOD 有权
    烧结R-Fe-B永磁体及其生产方法

    公开(公告)号:US20080017277A1

    公开(公告)日:2008-01-24

    申请号:US11548101

    申请日:2006-10-10

    IPC分类号: H01F41/02 H01F1/01

    摘要: A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of C, which is at least one of rare earth elements including Y, 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein it is in the shape of a ring having an outer diameter of 10-100 mm, an inner diameter of 8-96 mm, and a height of 10-70 mm, with a plurality of magnetic poles axiafly extending on an outer circumferential surface. The distribution of a surface magnetic flux density B0 on magnetic poles in an axial direction of the ring magnet is in a range of 92.5% or more of the maximum of B0.

    摘要翻译: 一种烧结永久磁铁,其特征在于,具有以质量计27〜33.5%的C,所述组合物为包含Y的稀土类元素,B为0.5〜2%,N:0.002〜0.15%,N:0.25%以下的至少1种 O,0.15%以下的C和0.001-0.05%的P,余量为Fe,其中,其外径为10-100mm,内径为8-96mm的环形, 高度为10-70mm,在外圆周表面上延伸有多个磁极轴。 在环形磁体的轴向上的磁极上的表面磁通密度B <0> 0 的分布在B 的最大值的92.5%以上的范围内, 。