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1.发明授权Method and apparatus for producing magnetically anisotropic Nd-Fe-B magnet material 失效用于制备磁各向异性Nd-Fe-B磁体材料的方法和装置
公开(公告)号：US4985086A
公开(公告)日：1991-01-15
申请号：US361685
申请日：1989-06-02
CPC分类号： B22F3/14 , B22F9/008 , H01F1/0576 , H01F41/0253
摘要： A method of producing a magnetically anisotropic Nd-Fe-B magnet material comprising the steps of: charging a green body produced by pressing a flaky or powdery material consisting of an amorphous alloy and/or a finely crystallized alloy, into a cavity defined by a die having a hole extending therethrough, a lower plunger inserted into said hole, and an upper plunger having a larger diameter than that of said hole; pressing said green body by elevating said lower plunger while keeping a temperature thereof (pressing temperature) at 600.degree.-850.degree.; elevating the resulting pressed body by elevating said lower plunger while heating; and upsetting said pressed body while keeping a temperature thereof (upsetting temperature) at 600.degree.-850.degree. C. to provide it with magnetic anisotropy.
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2.发明授权Method of manufacturing magnetically anisotropic magnet materials and device for same 失效制造磁各向异性磁体材料的方法及其装置
公开(公告)号：US4960469A
公开(公告)日：1990-10-02
申请号：US274570
申请日：1988-11-23
CPC分类号： B22F3/14 , H01F1/0576 , H01F41/0273 , H02K15/03 , Y10S264/58 , Y10S425/033
摘要： Disclosed are a method of and a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. According to the method, a green compact or a densified compact is first prepared from a selected flake or a powder material composed of amorphous and/or fine-crystallized particles obtained through rapid quenching of the molten alloy. It is then provided with magnetic anisotropy through plastic deformation effected radially inwardly along substantially the entire periphery of the compact initially deformed to receive a mandrel-core, and maintained at a temperature of 600 to 850 degrees C. Subsequently, the deformed body is magnetized with the desired radial or polar magnetization pattern. The device of this invention is composed of a die an upper punch, and a lower punch having two concentric sections. The space defined by the die and the upper and lower punches includes induction means for heating the green compact or the densified compact and sealing means for keeping the die under a reduced pressure condition or in an inert gas atmosphere.
摘要翻译： 公开了用于制造Nd-Fe-B合金磁体材料的方法和装置，特别是用于制造沿其圆周多极磁化的整体的柱状环形Nd-Fe-B磁体 并用作高效步进电机的转子磁铁。 根据该方法，首先从选择的薄片或由熔融合金的快速淬火获得的无定形和/或微细结晶颗粒构成的粉末材料制备生坯或致密成形体。 然后通过沿初始变形的初始变形的容器的整个周边径向向内地进行塑性变形而获得磁各向异性以接收心轴芯，并保持在600至850℃的温度。随后，变形体被磁化 所需的径向或极化磁化模式。 本发明的装置由上冲头模具和具有两个同心部分的下冲头组成。 由模具和上下冲头限定的空间包括用于加热生坯或致密的压实和密封装置的感应装置，用于将模具保持在减压条件下或在惰性气体气氛中。
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公开(公告)号：US5039292A
公开(公告)日：1991-08-13
申请号：US554400
申请日：1990-07-19
CPC分类号： B22F3/14 , H01F1/0576 , H01F41/0273 , H02K15/03 , Y10S264/58 , Y10S425/033
摘要： Disclosed is a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. The device of this invention is composed of a die punch, an upper and a lower punch having two concentric sections. The space is defined by the die and the upper and lower punches includes induction means for heating the green compact or the densified compact and sealing means for keeping the die under a reduced pressure condition or in an inert gas atmosphere.
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公开(公告)号：US4952239A
公开(公告)日：1990-08-28
申请号：US366160
申请日：1989-06-14
CPC分类号： H01F1/0578
摘要： Magnetically anisotropic powder and resin-bonded magnets made therefrom have "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis. The "flattened" grains are produced by plastically deforming a green compact of flakes formed by rapidly-quenching an alloy melt, and then crushing the plastically deformed body. In the alloy system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.
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5.发明授权
公开(公告)号：US5096509A
公开(公告)日：1992-03-17
申请号：US283910
申请日：1988-12-13
CPC分类号： H01F1/057 , B61C15/102 , C22C1/0441 , H01F1/0571 , H01F1/0577 , H01F1/0578
摘要： A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.
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6.发明授权Magnetically anisotropic bond magnet, magnetic powder for the magnet and manufacturing method of the powder 失效MAGNETICALLY ANISOTROPIC BOND MAGNET，MAGNETIC POWDER FOR THE MAGNET AND MANUFACTURING METHOD OF THE POWDER
公开(公告)号：US5085715A
公开(公告)日：1992-02-04
申请号：US443242
申请日：1989-12-04
CPC分类号： H01F1/0578
摘要： A process for producing magnetically anisotropic powder having "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis, includes the steps of plastically deforming a green compact of flakes formed by rapidly-quenching the alloy melt, and then crushing the plastically deformed body. In the alloy system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.
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7.发明授权
公开(公告)号：US4983232A
公开(公告)日：1991-01-08
申请号：US112875
申请日：1987-10-27
CPC分类号： H01F1/057 , B61C15/102 , C22C1/0441 , H01F1/0571 , H01F1/0577 , H01F1/0578
摘要： A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.
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公开(公告)号：USRE38042E1
公开(公告)日：2003-03-25
申请号：US09985262
申请日：2001-11-02
IPC分类号： H01F1053
CPC分类号： H01F1/0577 , B61C15/102 , C22C1/0441 , H01F1/057 , H01F1/0571 , H01F1/0578
摘要： A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 &mgr;m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 &mgr;m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.
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公开(公告)号：US4960474A
公开(公告)日：1990-10-02
申请号：US241735
申请日：1988-09-08
CPC分类号： H01F1/0576 , B22F3/14 , C22C1/0441 , H01F1/057 , H02K1/02 , H02K15/03
摘要： In a magnetically anisotropic magnet for use in a motor, comprising at least one rare earth element (R), Fe and boron (B), said magnet having fine crystal grains, the improvement comprising Ga added in the magnet so that the magnet has a surface magnification of not less than 6, a residual magnetic flux density in the direction of easy magnetization of not less than 11 kG and a coercive force of not less than 12 kOe.The invention also provide a method of producing the magnetically anisotropic magnet for use in a motor, comprising the steps of: forming flakes by rapid quenching a molten alloy consisting of at least one rare earth element (R), Fe, boron (B) and an optical metal element (M); compacting the flakes to provide a green compact; and warm plastic working the green compact at a temperature between 600.degree. C. and 800.degree. C. at a strain rate of 0.0001 to 0.1 per second with a plastic working ratio (ho/h) of not less than 2.
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10.发明授权Magnetically anisotropic bond magnet, magnetic powder for the magnet and manufacturing method of the powder 失效磁各向异性粘结磁体，磁粉用于磁体和粉末的制造方法
公开(公告)号：US4921553A
公开(公告)日：1990-05-01
申请号：US26969
申请日：1987-03-17
CPC分类号： H01F1/0578
摘要： Magnetically anisotripic powder and resin-bonded magnets made therefrom have "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis. The "flattened" grains are produced by plastically deforming a green compact of flakes formed by rapidly-quenching an alloy melt, and then crushing the plastically deformed body. In the allow system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.
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