利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.008 秒)

    Method of manufacturing a permanent magnet
    1.
    发明公开
    Method of manufacturing a permanent magnet 失效
    维尔法赫恩zum Herstellen eines Dauermagneten。

    公开(公告)号：EP0365079A1

    公开(公告)日：1990-04-25

    申请号：EP89202564.4

    申请日：1989-10-11

    申请人： Philips Electronics N.V.

    发明人： Flipse, Abraham Reinder ,  Kay, Peter James ,  Rozendaal, Ewoud

    IPC分类号： H01F1/053

    CPC分类号： H01F1/0577

    摘要： The invention describes a method of manufacturing a magnet on the basis of RE₂Fe₁₄B. To this end, a shaped body of the said composition is sintered by means of induction heating to a density exceeding 95% of the theoretical maximum density. The method according to the invention enables the manufacture of magnets having excellent properties in a very short time, these properties being: a high energy product, a large remanence, a high density, a large intrinsic coercive force and a small particle size.

    摘要翻译： 本发明描述了一种基于RE2Fe14B制造磁体的方法。 为此，通过感应加热将所述组合物的成形体烧结至超过理论最大密度的95％的密度。 根据本发明的方法能够在非常短的时间内制造具有优异性能的磁体，这些性能是：高能量产品，大剩磁，高密度，大的固有矫顽力和小的粒度。

    Improved method for the manufacture of rare earth transition metal alloy magnets
    2.
    发明公开
    Improved method for the manufacture of rare earth transition metal alloy magnets 无效
    Verfahren zur Erzeugung von Seltenerd-Übergangsmetall-Legierungsmagneten。

    公开(公告)号：EP0280372A1

    公开(公告)日：1988-08-31

    申请号：EP88200306.4

    申请日：1988-02-22

    申请人： PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

    发明人： Rozendaal, Ewoud

    IPC分类号： H01F1/06

    CPC分类号： H01F1/0577 ,  H01F1/0573

    摘要： In a known method of manufacturing a sintered rare earth transition metal and boron magnet body, e.g. of Nd-Fe-B, the cast alloy is comminuted by hydrogen decrepitation in an atmosphere of pure hydrogen before further comminution, pressing in a magnetic alignment field, sintering and magnetisation. The use of pure hydrogen introduces a serious risk of explosion.
    In the improved method the hydrogen is provided mixed with a chemically non-reactive gas, suitably nitrogen, suitably in a proportion in the range 5 percent to 30 percent by volume of hydrogen, to form an explosion suppressant atmosphere in the decrepitation vessel 1.

    摘要翻译： 在已知的制造烧结稀土过渡金属和硼磁体的方法中，例如， 的Nd-Fe-B，在再次粉碎之前，在纯氢气氛中通过氢气破裂将铸造合金粉碎，在磁取向场中压制，烧结和磁化。 使用纯氢气会引起严重的爆炸危险。 在改进的方法中，提供氢与化学非反应性气体（合适的氮气）合适地以比例为5％至30体积％的氢气混合，以在爆炸容器1中形成防爆气氛。