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    • 7. 发明申请
    • BONDED MAGNETS MADE WITH ATOMIZED PERMANENT MAGNETIC POWDERS
    • 粘合磁铁与原始的永磁粉末制成
    • WO02069357A8
    • 2002-11-14
    • PCT/US0206092
    • 2002-02-27
    • MAGNEQUENCH INC
    • SELLERS CHARLES HOWARDRABIN BARRY HALERVENS WILHELMWORDEN JOSEPH JAMESPANCHANATHAN VISWANATHAN
    • B22F9/08B22F1/00B22F3/00B22F9/10C22C38/00H01F1/053H01F1/057H01F1/08C04B35/04
    • C22C38/005B22F3/225B22F9/082B22F9/10B22F2998/00B22F2998/10C22C38/14C22C38/16H01F1/0574H01F1/0578B22F1/0003B22F1/0048B22F1/0055B22F1/0085B22F1/0059B22F3/20B22F3/02
    • The invention relates to magnets, particularly bonded magnets, of the Re-Fe-B type made from atomized magnetic powders and to methods of producing the powders and the magnet. The magnetic powders comprise, by weight, about 15 % to 25 % of RE; about 0.8 % to 2.0 % of B; about 1 % to 10 % of T; and balanced with Fe, Co, or mixtures thereof; wherein RE is one or more rare earth elements selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Er, Gd, Tb, Dy, Ho, Tm, Yb and Lu, and T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W. To produce bonded magnets, the atomized powders are heat treated, combined with a binder, pressed or molded, and cured to produce the bonded magnets. As compared to bonded magnets made from melt-spun powders or from other conventional atomized powders, bonded magnets of the present invention exhibit one or more of the following properties: less loss of intrinsic coercivity under repeated injection molding cycles; less internal magnetic shearing loss; improved flowability of the magnetic powders; improved Br and part integrity; less environmental degradation after exposure to high temperature and less flux loss; complex shapes and high part integrity; lower viscosity of the magnetic powder-binder mixtures; and high magnetic strength even for small-dimension magnets.
    • 本发明涉及由雾化磁粉制成的Re-Fe-B型磁体,特别是粘结磁体,以及制造粉末和磁体的方法。 磁粉包含重量约15%至25%的RE; 约0.8%至2.0%的B; 约1%至10%的T; 并与Fe,Co或其混合物平衡; 其中RE是选自Y,La,Ce,Pr,Nd,Sm,Er,Gd,Tb,Dy,Ho,Tm,Yb和Lu中的一种或多种稀土元素,T是一种或多种元素 选自Ti,Zr,Hf,V,Nb,Ta,Cr,Mo和W.为了制备粘结磁体,将雾化的粉末进行热处理,与粘合剂结合,压制或模制,并固化 粘结磁铁。 与由熔纺粉末或其它常规雾化粉末制成的粘结磁体相比,本发明的粘结磁体显示以下特性中的一种或多种:在重复注射成型循环下较少的固有矫顽力损失; 较少的内部磁剪切损耗; 提高磁粉的流动性; 改善Br和部分完整性; 暴露于高温后的环境退化较少,通量损失较少; 复杂的形状和高的零件完整性; 磁性粉末 - 粘合剂混合物的粘度较低; 并且即使对于小尺寸磁体也具有高的磁强度。
    • 8. 发明申请
    • BONDED MAGNETS MADE WITH ATOMIZED PERMANENT MAGNETIC POWDERS
    • 用雾化永久磁粉制成的粘结磁铁
    • WO2002069357A1
    • 2002-09-06
    • PCT/US2002/006092
    • 2002-02-27
    • MAGNEQUENCH INC.
    • SELLERS, Charles, HowardRABIN, Barry, HalERVENS, WilhelmWORDEN, Joseph, JamesPANCHANATHAN, Viswanathan
    • H01F1/057
    • C22C38/005B22F3/225B22F9/082B22F9/10B22F2998/00B22F2998/10C22C38/14C22C38/16H01F1/0574H01F1/0578B22F1/0003B22F1/0048B22F1/0055B22F1/0085B22F1/0059B22F3/20B22F3/02
    • The invention relates to magnets, particularly bonded magnets, of the Re-Fe-B type made from atomized magnetic powders and to methods of producing the powders and the magnet. The magnetic powders comprise, by weight, about 15 % to 25 % of RE; about 0.8 % to 2.0 % of B; about 1 % to 10 % of T; and balanced with Fe, Co, or mixtures thereof; wherein RE is one or more rare earth elements selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Er, Gd, Tb, Dy, Ho, Tm, Yb and Lu, and T is one or more elements selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W. To produce bonded magnets, the atomized powders are heat treated, combined with a binder, pressed or molded, and cured to produce the bonded magnets. As compared to bonded magnets made from melt-spun powders or from other conventional atomized powders, bonded magnets of the present invention exhibit one or more of the following properties: less loss of intrinsic coercivity under repeated injection molding cycles; less internal magnetic shearing loss; improved flowability of the magnetic powders; improved Br and part integrity; less environmental degradation after exposure to high temperature and less flux loss; complex shapes and high part integrity; lower viscosity of the magnetic powder-binder mixtures; and high magnetic strength even for small-dimension magnets.
    • 本发明涉及由雾化磁粉制成的Re-Fe-B型磁体,特别是粘结磁体,以及制造粉末和磁体的方法。 磁粉包含按重量计约15%至25%的RE; B的约0.8%至2.0% 约1%至10%的T; 并与Fe,Co或其混合物平衡; 其中RE是选自Y,La,Ce,Pr,Nd,Sm,Er,Gd,Tb,Dy,Ho,Tm,Yb和Lu中的一种或多种稀土元素,T是一种或多种元素 选自由Ti,Zr,Hf,V,Nb,Ta,Cr,Mo和W组成的组。为了制造粘结磁体,将雾化粉末热处理,与粘合剂结合,压制或模制, 粘结磁体。 与由熔体纺丝粉末或其他常规雾化粉末制成的粘结磁体相比,本发明的粘结磁体表现出以下性质中的一种或多种:在重复注塑循环下更少的本征矫顽力损失; 内部磁剪切损失少; 改善磁粉的流动性; 提高了Br和部件的完整性; 暴露于高温后的环境恶化较少且通量损失较少; 形状复杂,部件完整性高; 磁性粉末 - 粘合剂混合物的较低粘度; 即使对于小尺寸磁体也具有高磁性。