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1. 发明专利

JPS6067630A PREPARATION OF PERMANENT MAGNET ALLOY 失效
公开(公告)号：JPS6067630A
公开(公告)日：1985-04-18
申请号：JP17473683
申请日：1983-09-21
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , UCHIDA KIMIHO , TANIGAWA SHIGEO , MIZUHARA TAKESHI
IPC分类号： C22C1/04 , B22F1/00 , H01F1/06
摘要： PURPOSE:To prepare a permanent magnet alloy excellent in magnetic characteristics, by reducing and diffusing a powder comprising Co, Fe, Cu and other metals and rare earth metal oxide having proper tap density at a proper temp. by using a proper reducing agent. CONSTITUTION:Oxide of R (one or more of a rare earth metal based on Sm, Ce and Pr) with tap density of 0.3g/cm or more and a metal powder of Co, Fe, Cu and M (one or more of Si, Ti, Zr, V, Cr, Mn, Nb, Mo and Hf) or oxide thereof are preliminarily mixed with a reducing agent comprising one or more of Ca, CaH2 and Mg, and reduced and diffused at 1,000-1,300 deg.C while the obtained cake is thrown into water to remove CaO or the like by dissolving the same in water to obtain a permanent magnet alloy having a composition represented by R (Co1-x-y-zFexCuyMz)w (wherein 0.01 =0.25, 0.001

2. 发明专利

JPS5171062A Denshisenshusokuyojikaisochinojikaianteika shorihoho 失效
公开(公告)号：JPS5171062A
公开(公告)日：1976-06-19
申请号：JP14438674
申请日：1974-12-18
申请人： Nippon Telegraph & Telephone , Hitachi Metals Ltd
发明人： KAWASHIMA FUJIO , SUGAWARA TSUTOMU , KOMINE YUKIO , HARADA HIDEKI , TAKIMOTO SADAJI , MIZUHARA TAKESHI
IPC分类号： H01J23/087 , H01F7/02 , H01F13/00 , H01G4/22 , H01J23/08

3. 发明专利

JPH03287740A MANUFACTURE OF RAW MATERIAL FOR RARE EARTH PERMANENT MAGNET 失效
公开(公告)号：JPH03287740A
公开(公告)日：1991-12-18
申请号：JP8970190
申请日：1990-04-04
申请人： HITACHI METALS LTD
发明人： UCHIDA KIMIO , USHIJIMA MAKOTO , MIZUHARA TAKESHI , SHIBUSAWA HARUTAKA
IPC分类号： C22C1/04 , C22C1/00 , C22C1/02 , C22C33/00 , C22C33/02 , C22C33/04 , H01F1/053
摘要： PURPOSE:To manufacture a raw material for a rare earth permanent magnet excellent in magnetic properties at a low cost by heating and reducing a material constituted of the oxides of rare earth elements and the oxides of specified elements, thereafter washing the material, subjecting it to pulverizing, compacting and sintering and executing its componental regulation. CONSTITUTION:A material constituted of the oxides of rare earth elements R (where R denotes one or more kinds among La, Ce, Pr Nd, Sm or the like) and the oxides of elements M (where M denotes one or more kinds among Co, Fe, Ni, Mo, Cu or the like) is mixed with a reducing agent such as metallic Ca and metallic Mg, and this mixture is heated and reduced to form an RM series alloy. This RM series alloy is thereafter washed to remove CaO, MgO or the like which are reaction by-products. Next, the RM alloy is pulverized and is compacted, and this green compact is sintered in the atmosphere of an inert gas or in vacuum. After that, this sintered body is added to a molten metal constituted of R and/or M blended so as to form an RM series alloy having prescribed components including R and M in the sintered body, which is melted to manufacture an RM series alloy having prescribed components. In this way, the rare earth permanent magnet satisfactorily maintaining the magnetic properties of its own can be obtd. at a low cost.

4. 发明专利

JPS61239608A ANISOTROPIC MAGNET AND MANUFACTURE THEREOF 失效
公开(公告)号：JPS61239608A
公开(公告)日：1986-10-24
申请号：JP8064485
申请日：1985-04-16
申请人： HITACHI METALS LTD
发明人： KOBAYASHI AKIO , NAKAZONO IZUMI , MIZUHARA TAKESHI
IPC分类号： B22F3/02 , B22F5/10 , H01F41/02
摘要： PURPOSE:To easily obtain anisotropic magnetic characteristics as well as to manufacture the magnet to be used in the magnetic circuit such as a magnetron, a speaker and the like by a method wherein a press work is performed in such a manner that the density of magnetic flux on one punch surface is made higher than that of the other punch surface by adding magnetic field in molding space in the direction of compression. CONSTITUTION:Magnetic powder 4 is filled in the space formed by the dies 1 made of a non-magnetic material or the material having low permeability, the upper punch 2 and the lower punch 3, at least a part or more of which is made of ferromagnetic material. A coil 5, on which a magnetic field 6 is applied in the direction as shown by the arrow in the diagram, is arranged in the above-mentioned magnetic space. Magnetic space is formed in such a manner that the magnetic flux density on the surface of one punch 3 is made higher than the magnetic flux density on the surface of the other punch 2, and a press work is performed by adding magnetic field to the magnetic space in the direction of compression. An anisotropic magnet having excellent anisotropic characteristics can be manufactured easily by performing the above- mentioned processing method.

5. 发明专利

JPS61238938A SINTERING METHOD FOR PERMANENT MAGNET ALLOY 失效
公开(公告)号：JPS61238938A
公开(公告)日：1986-10-24
申请号：JP8064585
申请日：1985-04-16
申请人： HITACHI METALS LTD
发明人： KOBAYASHI AKIO , MIZUHARA TAKESHI , TAKANO MAKOTO
IPC分类号： C22C33/02 , C22C38/00 , H01F1/057 , H01F1/08
摘要： PURPOSE:To manufacture a permanent magnet alloy having high maximum energy product and excelling in magnetic properties by subjecting an alloy containing as essential components rare earth elements, B and Fe to crushing, compacting, heating and holding under specific conditions and then cooling. CONSTITUTION:The alloy consisting of, as essential components, about 8-30atom% R (at least one element among rare earth elements including Y), about 2-28atom% B, and the balance Fe with inevitable impurities is crushed to about 0.34-80mu average grain size and compacted under a pressure of about 0.5-10t/cm . The green compact is subjected to temp. raise from ordinary temp. in vacuum or in an inert gas (Ar etc.) or reducing gas (H2 etc.) and then to heating and holding at 900-1,200 deg.C in an H2 gas atmosphere, followed by cooling in vacuum or in an inert gas (Ar etc.) at a rate of about 0.5-100 deg.C/min.

6. 发明专利

JPS61210162A AGING TREATMENT FOR PERMANENT MAGNET ALLOY 失效
公开(公告)号：JPS61210162A
公开(公告)日：1986-09-18
申请号：JP5011085
申请日：1985-03-13
申请人： HITACHI METALS LTD
发明人： KOBAYASHI AKIO , UNO RYOJI , UCHIDA KIMIO , MIZUHARA TAKESHI
IPC分类号： H01F1/053 , C22C38/00 , C22F1/00 , C22F1/10 , H01F1/04
摘要： PURPOSE:To obtain permanent magnet alloy superior in magnetic characteristic, by soln. heat treating permanent magnetic alloy having a specified compsn. composed of rare earth element, Fe, Cu, Ti, Zr, Hf and Co, then cooling, next age treating said alloy under a suitable condition. CONSTITUTION:The permanent magnet alloy having compsn. composed of 20-30wt% R (R; >=one kind among rare earth element such as Sm, Ce), 10-25% Fe, 2-10% Cu, 0.5-6% M (M; >=one kind among Ti, Zr, Hf) and the balance Co substantially is soln. heat treated, then cooled. Next, said alloy is heated to 750-900 deg.C and held thereat, then cooled to

7. 发明专利

JPS58181836A Manufacture of permanent magnet alloy 失效
标题翻译：永磁合金的制造
公开(公告)号：JPS58181836A
公开(公告)日：1983-10-24
申请号：JP6293882
申请日：1982-04-15
申请人： Hitachi Metals Ltd
发明人： UCHIDA KIMIHO , USHIJIMA MAKOTO , MIZUHARA TAKESHI
IPC分类号： C22B7/00 , B22F8/00 , C22C1/02 , C22C1/04 , H01F1/04 , H01F1/08
CPC分类号： Y02P10/214 , Y02P10/24 , Y02W30/541
摘要： PURPOSE: To obtain the rare earth permanent magnet alloy excellent in magnetic permeability barely containing impurities, by remelting scraps formed on and after the step of sintering the magnet alloy of rare earth metals in the atmosphere of inert gas or the like.
CONSTITUTION: In the process of manufacturing the magnet alloy of rare earth metals represented by R
1 CO
5 or R
2 CO
17 (wherein R is one or more of rare earth metals including Y), scraps formed on and after the step of sintering are recovered. Said scraps are finely crushed, formed in a magnetic field and then remelted in the atmosphere of inert gas or a substantially vacuum atmosphere. By this treatment, various oxides based on the oxides of rare earth elements contained in the scraps are removed together with C and a part of formed carbides. Consequently, the scraps can be regenerated into the permanent magnet alloy of rare earth metals having the same level of a magnetic property as that of a product manufactured in an ordinary process.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过在惰性气体等的气氛中烧结稀土类金属的磁铁合金的工序之后形成的废料再次熔融，获得了几乎不含杂质的磁导率优异的稀土永磁体合金。构成：在制造由R 1 CO 5或R 2 CO 17（其中R是包括Y的稀土金属中的一种或多种）的稀土金属的磁体合金的制造过程中，回收在烧结步骤之后和之后形成的废料。将所述碎屑细粉碎，在磁场中形成，然后在惰性气体或基本真空气氛中重熔。通过这种处理，残留物中所含的稀土元素的氧化物的各种氧化物与C和一部分形成的碳化物一起被除去。因此，能够将废料再生成具有与通常的方法制造的产品相同的磁性水平的稀土金属的永久磁铁合金。

8. 发明专利

JPH03277733A MANUFACTURE OF RAW MATERIAL FOR RARE EARTH PERMANENT MAGNET 失效
公开(公告)号：JPH03277733A
公开(公告)日：1991-12-09
申请号：JP7775690
申请日：1990-03-27
申请人： HITACHI METALS LTD
发明人： UCHIDA KIMIO , USHIJIMA MAKOTO , MIZUHARA TAKESHI , SHIBUSAWA HARUTAKA
IPC分类号： C22C33/04 , C22C1/02 , H01F1/053
摘要： PURPOSE:To manufacture the raw material for a rare earth permanent magnet contg. Dy and excellent in magnetic properties at low cost by manufacturing a Dy-Fe alloy by the use of Dy2O3, Fe and metallic Ca as a raw material, pulverizing this alloy, thereafter compacting and sintering it, successively adding the alloy to a molten metal contg. rare earth elements and other specified elements, melting it and executing solidification. CONSTITUTION:The powder of Dy2O3 and Fe is mixed with metallic Ca as a reducing agent, and this mixture is heated in an Ar atmosphere to reduce Dy2O3 by Ca and to manufacture a Dy-Fe series alloy. This alloy is finely pulverized and is thereafter compacted, and the obtd. green compact is sintered in the atmosphere of an inert gas or a reducing gas or in vacuum. On the other hand, the molten metal of an alloy in which one or more kinds among Sc, Y and lanthanoide series elements and other specified elements are melted by an other apparatus is mixed with the above sintered body, and the mixture is heated and melted. The raw material for a rare earth permanent magnet contg. no CaO as a reducing product and excellent in magnetic properties such as coercive force, residual magnetic flux density and maximum energy product can be manufactured at a low cost.

9. 发明专利

JPH03198304A MANUFACTURE OF MATERIAL POWDER FOR RARE EARTH PERMANENT MAGNET 失效
公开(公告)号：JPH03198304A
公开(公告)日：1991-08-29
申请号：JP33906389
申请日：1989-12-27
申请人： HITACHI METALS LTD
发明人： USHIJIMA MAKOTO , MIZUHARA TAKESHI , SHIBUSAWA HARUTAKA
IPC分类号： B22F9/04 , C22C1/00 , C22C1/02 , H01F1/055 , H01F1/06 , H01F41/02
摘要： PURPOSE:To make it preserve the magnetic property peculiar to rare earth and reduce cost by using specific grain diameter of powder, which is obtained by mixing one or more kinds out of oxides, fluorides, sulfides, chlorides, nitrides, and carbonates of rare earth metal, and metal having Co as an indispensable ingredient, and metal Ca and classifying it after reduction by heating, as a main ingredient. CONSTITUTION:One ore more kinds out of oxides, fluorides, sulfides, chlorides, nitrides, carbonates of rare earth metal, and metal M (M is Co, Fe, Ni, Mo, etc., being indispensable ingredients), and metal Ca are mixed, and then are reduced after heating to produce RM alloy (R is Sc, Y, La, Ce, or the like), and the RM alloy is classified so that the ones of 10mum or more in grain diameter may exist 90wt.% or more. Next, it is made into a block shape at formation pressure of 0.3 ton/cm or more, and while making a compact contain RM ingredients by desired amounts within itself, such material is dissolved. Then it is made into powder form, thus it is made into desired material powder for magnet.

10. 发明专利

JPS60121239A MANUFACTURE OF PERMANENT MAGNET ALLOY 失效
公开(公告)号：JPS60121239A
公开(公告)日：1985-06-28
申请号：JP23016683
申请日：1983-12-06
申请人： HITACHI METALS LTD
发明人： TAWARA KAZUNORI , UCHIDA KIMIHO , TANIGAWA SHIGEO , MIZUHARA TAKESHI
IPC分类号： C22C1/00 , C22C1/04 , C22C19/07 , H01F1/08
摘要： PURPOSE:To obtain a homogeneous permanent magnet alloy by preparing a Cu substituted multicomponent intermetallic compound contg. a rare earth metal as a permanent magnet alloy. CONSTITUTION:The oxide of a rare earth metal is mixed with metallic powders of Fe, Co, Cu and M or oxides of the metals and a reducing agent (Na and/or K combined optionally with one or more among Ca, CaH2 and Mg), and the mixture is brought into a reduction diffusion reaction. A permanent magnet alloy having a composition represented by the formula is obtd. In the formula, R is one or more among Sm, Ce and Pr, M is one or more among Si, Ti, V, Cr, Mn, Nb, Mo and Hf, 0.01

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