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21. 发明授权

US09837193B2 R-T-B sintered magnet 有权
公开(公告)号：US09837193B2
公开(公告)日：2017-12-05
申请号：US13980133
申请日：2012-01-19
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F1/053 , B22F3/24 , C22C33/02 , C22C38/00 , H01F41/02 , H01F1/057
CPC分类号： H01F1/0536 , B22F3/24 , C22C33/0278 , C22C38/00 , C22C38/005 , H01F1/0577 , H01F41/0293
摘要： This sintered R-T-B based rare-earth magnet includes: R2Fe14B type compound crystal grains, including a light rare-earth element RL (which includes at least one of Nd and Pr) as a major rare-earth element R, as main phases; and a heavy rare-earth element RH (which includes at least one of Dy and Tb). Before its surface region is removed, the sintered R-T-B based rare-earth magnet has no layer including the rare-earth element R at a high concentration in that surface region. The sintered R-T-B based rare-earth magnet has a portion in which coercivity decreases gradually from its surface region toward its core portion. The difference in the amount of TRE between a portion of the sintered R-T-B based rare-earth magnet that reaches a depth of 500 μm as measured from its surface region toward its core portion and the core portion of the sintered R-T-B based rare-earth magnet is 0.1 through 1.0.

22. 发明申请

US20120112863A1 PROCESS FOR PRODUCTION OF R-T-B BASED SINTERED MAGNETS AND R-T-B BASED SINTERED MAGNETS 有权
标题翻译：生产基于R-T-B的烧结磁体和R-T-B基烧结磁体的方法
公开(公告)号：US20120112863A1
公开(公告)日：2012-05-10
申请号：US13382587
申请日：2010-07-12
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F7/02 , B05D3/02 , B05D5/00
CPC分类号： B22F3/24 , B22F2003/241 , C22C19/07 , C22C28/00 , C22C33/0278 , C22C38/005 , C22C2202/02 , C22F1/10 , C22F1/16 , H01F1/0577 , H01F41/0293
摘要： A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body 1; providing an RH diffusion source 2 including a metal or an alloy of a heavy rare-earth element RH (which is at least one of Dy an Tb); loading the sintered magnet body 1 and the RH diffusion source 2 into a processing chamber 3 so that the magnet body 1 and the diffusion source 2 are movable relative to each other and brought close to, or in contact with, each other; and performing an RH diffusion process by conducting a heat treatment on the sintered R-T-B based magnet body 1 and the RH diffusion source 2 at a temperature of 500° C. to 850° C. for at least 10 minutes while moving the magnet body 1 and the diffusion source 2 either continuously or discontinuously in the processing chamber 3.
摘要翻译：制造R-T-B系烧结磁体的方法包括以下步骤：提供R-T-B系烧结磁体1; 提供包括重稀土元素RH（其为Dy和Tb中的至少一种）的金属或合金的RH扩散源2; 将烧结磁体1和RH扩散源2加载到处理室3中，使得磁体1和扩散源2相对于彼此可移动并且彼此接近或接触; 并且通过在温度为500℃至850℃的温度下在基于RTB的磁体1和RH扩散源2上进行热处理至少10分钟进行RH扩散处理，同时移动磁体1和扩散源2在处理室3中连续地或不连续地。

23. 发明申请

US20120032764A1 ALLOY FOR SINTERED R-T-B-M MAGNET AND METHOD FOR PRODUCING SAME 有权
标题翻译：用于烧结R-T-B-M磁铁的合金及其制造方法
公开(公告)号：US20120032764A1
公开(公告)日：2012-02-09
申请号：US13260755
申请日：2010-03-29
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F7/02 , C21D8/00 , B22F3/12 , B22F1/00 , C21D6/00
CPC分类号： H01F41/0266 , C22C1/0441 , C22C2202/02 , H01F1/0577
摘要： In order to make a sintered R-T-B-M magnet so that R2T14B phases that include a lot of Dy in the surface region of the main phase are distributed over the entire magnet, a region including a heavy rare-earth element RH at a high concentration is formed continuously beforehand at an interface between the crystals of an R2T14B compound that is the main phase of the sintered R-T-B-M magnet and the other phases.
摘要翻译：为了制造烧结的RTBM磁体，使得在主相的表面区域中包含大量Dy的R2T14B相分布在整个磁体上，连续地形成包括高浓度的重稀土元素RH的区域预先在作为烧结RTBM磁体的主相的R2T14B化合物的晶体与其它相之间的界面处。

24. 发明授权

US07931756B2 Method and machine of making rare-earth alloy granulated powder and method of making rare-earth alloy sintered body 有权
标题翻译：制造稀土合金造粒粉的方法和机器及制备稀土合金烧结体的方法
公开(公告)号：US07931756B2
公开(公告)日：2011-04-26
申请号：US12573374
申请日：2009-10-05
申请人： Futoshi Kuniyoshi , Tomoiku Otani
发明人： Futoshi Kuniyoshi , Tomoiku Otani
IPC分类号： H01F1/04 , H01F1/053
CPC分类号： H01F1/0577 , B01J2/16 , B22F1/0096 , B22F2998/00 , B22F2998/10 , H01F1/053 , H01F1/0571 , H01F41/0273 , C22C1/0441 , B22F2202/05 , B22F3/12
摘要： A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remnant magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remnant magnetization of the powder. Since the agglomeration force produced by the remnant magnetization is utilized, the addition of a granulating agent may be omitted.
摘要翻译：制造本发明的稀土类合金造粒粉末的方法包括以下步骤：制备稀土合金粉末; 在粉末中产生残余磁化; 并通过利用由粉末的剩余磁化产生的附聚力来粉碎粉末。由于利用由剩余磁化产生的附聚力，可以省略添加造粒剂。

25. 发明授权

US09415444B2 Process for production of R-T-B based sintered magnets and R-T-B based sintered magnets 有权
标题翻译：制造R-T-B系烧结磁体和R-T-B系烧结磁铁的方法
公开(公告)号：US09415444B2
公开(公告)日：2016-08-16
申请号：US13382587
申请日：2010-07-12
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F41/02 , H01F7/02 , B22F3/24 , C22C28/00 , C22C33/02 , C22C19/07 , C22C38/00 , C22F1/10 , C22F1/16 , H01F1/057
CPC分类号： B22F3/24 , B22F2003/241 , C22C19/07 , C22C28/00 , C22C33/0278 , C22C38/005 , C22C2202/02 , C22F1/10 , C22F1/16 , H01F1/0577 , H01F41/0293
摘要： A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body 1; providing an RH diffusion source 2 including a metal or an alloy of a heavy rare-earth element RH (which is at least one of Dy an Tb); loading the sintered magnet body 1 and the RH diffusion source 2 into a processing chamber 3 so that the magnet body 1 and the diffusion source 2 are movable relative to each other and brought close to, or in contact with, each other; and performing an RH diffusion process by conducting a heat treatment on the sintered R-T-B based magnet body 1 and the RH diffusion source 2 at a temperature of 500° C. to 850° C. for at least 10 minutes while moving the magnet body 1 and the diffusion source 2 either continuously or discontinuously in the processing chamber 3.
摘要翻译：制造R-T-B系烧结磁体的方法包括以下步骤：提供R-T-B系烧结磁体1; 提供包括重稀土元素RH（其为Dy和Tb中的至少一种）的金属或合金的RH扩散源2; 将烧结磁体1和RH扩散源2加载到处理室3中，使得磁体1和扩散源2相对于彼此可移动并且彼此接近或接触; 并且通过在温度为500℃至850℃的温度下在基于RTB的磁体1和RH扩散源2上进行热处理至少10分钟进行RH扩散处理，同时移动磁体1和扩散源2在处理室3中连续地或不连续地。

26. 发明申请

US20130293328A1 R-T-B SINTERED MAGNET 有权
标题翻译： R-T-B烧结磁铁
公开(公告)号：US20130293328A1
公开(公告)日：2013-11-07
申请号：US13980133
申请日：2012-01-19
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F1/053
CPC分类号： H01F1/0536 , B22F3/24 , C22C33/0278 , C22C38/00 , C22C38/005 , H01F1/0577 , H01F41/0293
摘要： This sintered R-T-B based rare-earth magnet includes: R2Fe14B type compound crystal grains, including a light rare-earth element RL (which includes at least one of Nd and Pr) as a major rare-earth element R, as main phases; and a heavy rare-earth element RH (which includes at least one of Dy and Tb). Before its surface region is removed, the sintered R-T-B based rare-earth magnet has no layer including the rare-earth element R at a high concentration in that surface region. The sintered R-T-B based rare-earth magnet has a portion in which coercivity decreases gradually from its surface region toward its core portion. The difference in the amount of TRE between a portion of the sintered R-T-B based rare-earth magnet that reaches a depth of 500 μm as measured from its surface region toward its core portion and the core portion of the sintered R-T-B based rare-earth magnet is 0.1 through 1.0.
摘要翻译：这种烧结的R-T-B系稀土类磁铁包括：作为主要的稀土元素R的稀土类元素RL（包括Nd和Pr中的至少一种）的R2Fe14B型复合晶粒，和重稀土元素RH（其包括Dy和Tb中的至少一种）。在除去表面区域之前，烧结的R-T-B系稀土类磁铁在该表面区域中没有含有高浓度的稀土类元素R的层。烧结的R-T-B类稀土类磁体具有矫顽力从其表面区域向其芯部逐渐减小的部分。从其表面区域向其芯部测量达到深度为500μm的烧结RTB型稀土类磁体的一部分与RTB型稀土类烧结体的核心部分之间的TRE量的差异为 0.1至1.0。

27. 发明申请

US20130171342A1 R-T-B SINTERED MAGNET MANUFACTURING METHOD 有权
标题翻译： R-T-B烧结磁铁制造方法
公开(公告)号：US20130171342A1
公开(公告)日：2013-07-04
申请号：US13823153
申请日：2011-09-29
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F41/00
CPC分类号： H01F41/005 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/16 , C22C38/32 , C22C2202/02 , H01F1/0577 , H01F41/0293
摘要： [Problem] To provide a heavy rare-earth element RH diffusion process that contributes greatly to mass production.[Solution] A method for producing a sintered magnet includes the steps of: providing a sintered R-T-B based magnet body; providing an RH diffusion source which is made of at least one of a fluoride, an oxide and an oxyfluoride that each include Dy and/or Tb; loading the sintered R-T-B based magnet body and the RH diffusion source into a process chamber so that the magnet body and the diffusion source are movable relative to each other and are readily brought close to, or into contact with, each other; and performing an RH diffusion process in which the sintered R-T-B based magnet body and the RH diffusion source are heated to a processing temperature of 800° C. through 950° C. while being moved either continuously or discontinuously in the process chamber.
摘要翻译： [问题]提供重质量的稀土元素RH扩散工艺，其大大有利于批量生产。 [解决方案]烧结磁体的制造方法包括以下工序：提供烧结的R-T-B系磁体; 提供由包含Dy和/或Tb的氟化物，氧化物和氟氧化物中的至少一种制成的RH扩散源; 将烧结的R-T-B基磁体和RH扩散源装载到处理室中，使得磁体和扩散源相对于彼此可移动并且容易彼此接近或接触; 并且在处理室中连续地或不连续地移动时，将烧结的R-T-B系磁体和RH扩散源加热到800℃〜950℃的RH扩散处理。

28. 发明申请

US20130087248A1 METHOD FOR PRODUCING R-T-B-BASED SINTERED MAGNETS 有权
标题翻译：用于生产基于R-T-B的烧结磁体的方法
公开(公告)号：US20130087248A1
公开(公告)日：2013-04-11
申请号：US13805466
申请日：2011-07-12
申请人： Futoshi Kuniyoshi
发明人： Futoshi Kuniyoshi
IPC分类号： H01F41/02 , H01F7/02
CPC分类号： H01F41/0293 , B22F3/24 , C22C1/02 , C22C27/00 , C22C33/0278 , C22C38/00 , C22C38/005 , H01F1/0577 , H01F7/02
摘要： A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body 1; providing an RH diffusion source including a heavy rare-earth element RH (which is at least one of Dy and Tb) and 30 mass % to 80 mass % of Fe; loading the sintered R-T-B based magnet body 1 and the RH diffusion source 2 into a processing chamber 3 so that the magnet body 1 and the diffusion source 2 are movable relative to each other and are readily brought close to, or in contact with, each other; and performing an RH diffusion process in which the sintered magnet body 1 and the RH diffusion source 2 are heated to a processing temperature of more than 850° C. through 1000° C. while being moved either continuously or discontinuously in the processing chamber.
摘要翻译：制造R-T-B系烧结磁体的方法包括以下步骤：提供R-T-B系烧结磁体1; 提供包括重稀土元素RH（其为Dy和Tb中的至少一种）和30质量％至80质量％的Fe的RH扩散源; 将烧结的RTB基磁体1和RH扩散源2加载到处理室3中，使得磁体1和扩散源2可相对于彼此移动并且容易彼此接近或接触 ; 并且在处理室中连续地或不连续地移动时，进行将烧结磁体1和RH扩散源2加热到850℃以上1000℃以下的加工温度的RH扩散工序。

29. 发明授权

US08142573B2 R-T-B sintered magnet and method for producing the same 有权
标题翻译： R-T-B烧结磁体及其制造方法
公开(公告)号：US08142573B2
公开(公告)日：2012-03-27
申请号：US12595293
申请日：2008-04-11
申请人： Hiroya Kobayashi , Futoshi Kuniyoshi
发明人： Hiroya Kobayashi , Futoshi Kuniyoshi
IPC分类号： H01F1/057
CPC分类号： H01F41/0266 , B22F7/02 , B22F2999/00 , C21D6/00 , C21D8/1211 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/0577 , H01F7/021 , H01F41/0293 , B22F2207/01
摘要： An R-T-B based sintered magnet includes both a light rare-earth element RL (which is at least one of Nd and Pr) and a heavy rare-earth element RH (which is at least one of Dy and Tb) and Nd2Fe14B type crystals as a main phase. The magnet has a first region, which includes either the heavy rare-earth element RH in a relatively low concentration or no heavy rare-earth elements RH at all, and a second region, which includes the heavy rare-earth element RH in a relatively high concentration. The first and second regions are combined together by going through a sintering process.
摘要翻译： RTB型烧结磁体包括轻稀土元素RL（其为Nd和Pr中的至少一种）和重稀土元素RH（其为Dy和Tb中的至少一种）和Nd 2 Fe 14 B型晶体作为主要阶段磁体具有第一区域，其包括相对低浓度的重稀土元素RH或根本没有重稀土元素RH，第二区域包括相对较重的稀土元素RH 高浓度通过烧结过程将第一和第二区域组合在一起。

30. 发明申请

US20110025440A1 R-T-B-TYPE SINTERED MAGNET AND METHOD FOR PRODUCTION THEREOF 有权
标题翻译： R-T-B型烧结磁体及其制造方法
公开(公告)号：US20110025440A1
公开(公告)日：2011-02-03
申请号：US12935318
申请日：2009-03-30
申请人： Futoshi Kuniyoshi , Rintaro Ishii
发明人： Futoshi Kuniyoshi , Rintaro Ishii
IPC分类号： H01F7/02 , B22F3/12
CPC分类号： C22C38/16 , B22F2998/10 , B22F2999/00 , C22C33/0278 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/10 , C22C2202/02 , H01F1/0571 , H01F1/0573 , H01F1/0577 , H01F41/0273 , B22F9/04 , B22F3/02 , B22F3/10 , B22F2202/05
摘要： An R-T-B based sintered magnet according to the present invention has a composition including: 27.3 mass % to 29.5 mass % of R; 0.92 mass % to 1 mass % of B; 0.05 mass % to 0.3 mass % of Cu; 0.02 mass % to 0.5 mass % of M; and T as the balance, and has an oxygen content of 0.02 mass % to 0.2 mass %. The main phase of the sintered magnet is an R2T14B type compound. The crystal grain size of the main phase is represented by an equivalent circle diameter of 8 μm or less. And crystal grains with equivalent circle diameters of 4 μm or less account for at least 80% of the overall area of the main phase.
摘要翻译：本发明的R-T-B系烧结磁体具有以下成分：R：27.3质量％〜29.5质量％ 0.92质量％〜1质量％ 0.05质量％〜0.3质量％的Cu; 0.02质量％〜0.5质量％的M; T为余量，氧含量为0.02质量％〜0.2质量％。烧结磁体的主相是R2T14B型化合物。主相的晶粒尺寸由等效圆直径为8μm以下表示。而等效圆直径为4μm以下的晶粒占主相面积的至少80％。

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