-
公开(公告)号：US10381141B2
公开(公告)日：2019-08-13
申请号：US14441961
申请日：2013-11-08
Inventor： Hiroshi Nagata , Chonghu Wu
IPC: H01F1/057 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/10 , C22C38/16 , C22C38/22 , C22C38/32 , C22C38/46 , C22C38/54 , B22F3/04 , B22F3/12 , B22F9/04 , C22C38/30 , H01F1/055 , H01F41/02
Abstract: The present invention discloses manufacturing methods of a powder for compacting rare earth magnet powder and rare earth magnet that omit jet milling process, which comprises the steps as follows: 1) casting: casting the molten alloy of rare earth magnet raw material by strip casting method to obtain a quenched alloy with average thickness in a range of 0.2˜0.4 mm; 2) hydrogen decrepitation: decrepitating the quenched alloy and a plurality of rigid balls into a rotating hydrogen decrepitation container simultaneously, the quenched alloy is crushed under a hydrogen pressure between 0.01˜1 MPa, cooling the alloy and the balls, then screening the mixture to remove the rigid balls and obtain the powder. As the jet milling process is omitted, the oxygenation during the process of the jet milling may be avoided, therefore the process may be non-oxide, and the mass production of magnet with super high property may be possible.
-
公开(公告)号：US10242779B2
公开(公告)日：2019-03-26
申请号：US14758699
申请日：2013-12-30
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
IPC: B22F1/00 , C21D6/00 , C22C38/04 , C22C38/02 , H01F1/057 , C22C38/06 , C22C38/00 , C22C38/54 , C22C38/32 , C22C38/28 , C22C38/14 , H01F41/02 , C22C38/10 , C22C38/12 , C22C38/16 , C22C38/44 , B22F9/04 , B22F3/16 , C21D1/773 , C22C38/18 , H01F1/053
Abstract: A manufacturing method of an alloy powder for rare earth magnet and the rare earth magnet based on heat treatment includes the following: an alloy of the rare earth magnet is firstly coarsely crushed and then finely crushed by jet milling to obtain a fine powder; the fine powder is obtained by being heated in vacuum or in inert gas atmosphere at a temperature of 100° C.˜1000° C. for 6 minutes to 24 hours. The heat treatment of fine powder is performed after the process of finely crushed jet milling before the process of compacting under a magnetic field, so that the sintering property of the powder is changed drastically, and it obtains a magnet with a high coercivity, a high squareness and a high heat resistance.
-
3.发明申请MANUFACTURING METHOD OF RARE EARTH MAGNET ALLOY POWDER, RARE EARTH MAGNET AND A POWDER MAKING DEVICE 审中-公开稀土磁铁合金粉末，稀土磁粉和粉末制造装置的制造方法公开(公告)号：US20150239048A1
公开(公告)日：2015-08-27
申请号：US14427159
申请日：2013-09-10
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
CPC classification number: B22F9/04 , B22F9/023 , B22F2009/044 , B22F2009/045 , B22F2998/10 , B22F2999/00 , H01F1/0536 , H01F1/0571 , H01F1/0577 , H01F41/0266 , B22F3/02 , B22F3/1017 , B22F2003/248 , B22F2201/10 , B22F2201/11 , B22F2202/05
Abstract: The present invention discloses a manufacturing method and device of rare earth magnet alloy powder and rare earth magnet. The method comprises a process of fine grinding at least one kind of rare earth magnet alloy or at least one kind of rare earth magnet alloy coarse powder in inert jet stream with oxygen content below 1000 ppm to obtain powder with grain size smaller than 50 μm. Low oxygen content ultra fine powder with grain size smaller than 1 μm is not separated from the pulverizer, the oxygen content of the atmosphere is reduced to below 1000 ppm in the pulverizer when crushing the powder, thereby abnormal grain growth (AGG) rarely happens in the sintering process to get low oxygen content sintered magnet, it has advantages of simplifying process and reducing manufacturing cost.
Abstract translation: 本发明公开了一种稀土磁体合金粉末和稀土磁体的制造方法和装置。 该方法包括在氧含量低于1000ppm的惰性喷射流中精细研磨至少一种稀土磁体合金或至少一种稀土磁体合金粗粉末以获得粒径小于50μm的粉末的方法。 颗粒尺寸小于1μm的低氧含量超细粉末与粉碎机不分离，当粉碎粉碎时，粉碎机中气氛的氧含量降低到1000ppm以下，因此异常晶粒生长（AGG）很少发生在 烧结过程中获得低含氧烧结磁体，具有简化工艺，降低制造成本的优点。
-
4.发明申请公开(公告)号：US20180281072A1
公开(公告)日：2018-10-04
申请号：US15937795
申请日：2018-03-27
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
CPC classification number: B22F9/04 , B22F9/023 , B22F2009/044 , B22F2009/045 , B22F2998/10 , B22F2999/00 , H01F1/0536 , H01F1/0571 , H01F1/0577 , H01F41/0266 , B22F3/02 , B22F3/1017 , B22F2003/248 , B22F2201/10 , B22F2201/11 , B22F2202/05
Abstract: The present invention discloses a method of manufacturing, powder making device for rare earth magnet alloy powder, and a rare earth magnet. The method comprises a process of fine grinding at least one kind of rare earth magnet alloy or at least one kind of rare earth magnet alloy coarse powder in inert jet stream with an oxygen content below 1000 ppm to obtain powder that has a grain size smaller than 50 μm. Low oxygen content ultra-fine powder having a grain size smaller than 1 μm is not separated from the pulverizer, and the oxygen content of the atmosphere is reduced to below 1000 ppm in the pulverizer when crushing the powder. Therefore, abnormal grain growth (AGG) rarely happens in the sintering process. A low oxygen content sintered magnet is obtained and the advantages of a simplified process and reduced manufacturing cost are realized.
-
Patent Agency Ranking
5.发明申请MANUFACTURING METHOD OF GREEN COMPACTS OF RARE EARTH ALLOY MAGNETIC POWDER AND A MANUFACTURING METHOD OF RARE EARTH MAGNET 审中-公开稀土合金粉末的绿色混合制造方法及稀土磁铁的制造方法公开(公告)号：US20150287529A1
公开(公告)日：2015-10-08
申请号：US14435017
申请日：2013-10-11
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
CPC classification number: H01F41/0266 , B22F3/14 , B22F3/24 , B22F2003/248 , B22F2999/00 , C22C38/002 , C22C38/005 , C22C38/10 , C22C2202/00 , H01F1/0576 , H01F1/0577 , H01F1/08 , B22F3/02 , B22F2201/00
Abstract: The present invention discloses a manufacturing method of green compacts of rare earth alloy magnetic powder and a manufacturing method of rare earth magnet, it is a manufacturing method that pressing the rare earth alloy magnetic powder added with organic additive in a closed space filled with inert gases to manufacture the green compacts, wherein the rare earth alloy magnetic powder is compacted under magnetic field in a temperature atmosphere of 25° C.-50° C. and a relative humidity atmosphere of 10%-40%. This method is to set the temperature of the inert atmosphere in a fully closed space, inhibiting bad forming phenomenon of the magnet with low oxygen content (broken, corner-breakage, crack) after sintering, and increasing the degree of orientation, Br and (BH)max.
Abstract translation: 本发明公开了一种稀土合金磁粉的生坯的制造方法和稀土类磁铁的制造方法，是在填充有惰性气体的封闭空间内加入有机添加剂的稀土类合金磁性粉末的制造方法 制造生坯，其中稀土合金磁粉在25℃-50℃的温度气氛和10％-40％的相对湿度气氛中在磁场下压实。 该方法是将惰性气氛的温度设定在完全封闭的空间内，抑制烧结后氧含量低的磁体（断裂，断裂，裂纹）的不良形成现象，提高取向度Br和（ BH）最大
-
6.发明申请MANUFACTURING METHOD OF A POWDER FOR COMPACTING RARE EARTH MAGNET AND THE RARE EARTH MAGNET OMITTING JET MILLING PROCESS 审中-公开用于压制稀土磁铁的粉末制造方法和稀土磁铁注入喷嘴流程公开(公告)号：US20150279530A1
公开(公告)日：2015-10-01
申请号：US14441961
申请日：2013-11-08
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
IPC: H01F1/057 , H01F41/02 , B22F3/12 , B22F3/04 , B22F9/04 , C22C38/00 , C22C38/04 , C22C38/32 , C22C38/30 , C22C38/22 , C22C38/54 , C22C38/46 , C22C38/02 , C22C38/16 , C22C38/10 , H01F1/055
CPC classification number: H01F1/0577 , B22F3/04 , B22F3/12 , B22F9/04 , B22F2009/043 , B22F2009/048 , B22F2999/00 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/10 , C22C38/16 , C22C38/22 , C22C38/30 , C22C38/32 , C22C38/46 , C22C38/54 , C22C2202/02 , H01F1/0556 , H01F1/0557 , H01F1/0573 , H01F1/0576 , H01F41/0266 , B22F2201/013
Abstract: The present invention discloses manufacturing methods of a powder for compacting rare earth magnet powder and rare earth magnet that omit jet milling process, which comprises the steps as follows: 1) casting: casting the molten alloy of rare earth magnet raw material by strip casting method to obtain a quenched alloy with average thickness in a range of 0.2˜0.4 mm; 2) hydrogen decrepitation: decrepitating the quenched alloy and a plurality of rigid balls into a rotating hydrogen decrepitation container simultaneously, the quenched alloy is crushed under a hydrogen pressure between 0.01˜1 MPa, cooling the alloy and the balls, then screening the mixture to remove the rigid balls and obtain the powder. As the jet milling process is omitted, the oxygenation during the process of the jet milling may be avoided, therefore the process may be non-oxide, and the mass production of magnet with super high property may be possible.
Abstract translation: 本发明公开了一种用于压实稀土磁体粉末和稀土磁体的粉末的制造方法，该方法包括以下步骤：1）铸造：通过带铸法铸造稀土磁体原料的熔融合金 得到平均厚度在0.2〜0.4mm范围内的淬火合金; 2）氢气爆裂：将淬火的合金和多个刚性球同时破裂成旋转氢爆裂容器，淬火的合金在0.01〜1MPa的氢气压力下冷却，冷却合金和球，然后将混合物筛分 取出刚性球并获得粉末。 由于省略喷射研磨方法，因此可以避免喷射研磨过程中的氧合，因此该方法可以是非氧化物的，并且具有超高性能的磁体的批量生产是可能的。
-
公开(公告)号：US10717131B2
公开(公告)日：2020-07-21
申请号：US15937795
申请日：2018-03-27
Inventor： Hiroshi Nagata , Chonghu Wu
Abstract: The present invention discloses a method of manufacturing, powder making device for rare earth magnet alloy powder, and a rare earth magnet. The method comprises a process of fine grinding at least one kind of rare earth magnet alloy or at least one kind of rare earth magnet alloy coarse powder in inert jet stream with an oxygen content below 1000 ppm to obtain powder that has a grain size smaller than 50 μm. Low oxygen content ultra-fine powder having a grain size smaller than 1 μm is not separated from the pulverizer, and the oxygen content of the atmosphere is reduced to below 1000 ppm in the pulverizer when crushing the powder. Therefore, abnormal grain growth (AGG) rarely happens in the sintering process. A low oxygen content sintered magnet is obtained and the advantages of a simplified process and reduced manufacturing cost are realized.
-
公开(公告)号：US10242778B2
公开(公告)日：2019-03-26
申请号：US14758698
申请日：2013-12-30
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
IPC: B22F1/00 , H01F1/053 , C21D6/00 , C21D1/773 , H01F1/057 , C22C38/06 , C22C38/00 , C22C38/54 , C22C38/32 , C22C38/28 , C22C38/14 , H01F41/02 , C22C38/02 , C22C38/04 , C22C38/10 , C22C38/12 , C22C38/16 , C22C38/44 , B22F9/04 , B22F3/16 , C22C38/18
Abstract: A manufacturing method of rare earth magnet based on heat treatment of fine powder includes the following: an alloy for the rare earth magnet is firstly coarsely crushed and then finely crushed by jet milling to obtain a fine powder; the fine powder is heated in vacuum or in inert gas atmosphere at a temperature of 100° C.˜1000° C. for 6 minutes to 24 hours; then the fine powder is compacted under a magnet field and is sintered in vacuum or in inert gas atmosphere at a temperature of 950° C.˜1140° C. to obtain a sintered magnet; and machining the sintered magnet to obtain a magnet; then the magnet performs a RH grain boundary diffusion at a temperature of 700° C.˜1020° C. An oxidation film forms on the surface of all of the powder.
-
公开(公告)号：US10062503B2
公开(公告)日：2018-08-28
申请号：US14435017
申请日：2013-10-11
Applicant: XIAMEN TUNGSTEN CO., LTD.
Inventor： Hiroshi Nagata , Chonghu Wu
CPC classification number: H01F41/0266 , B22F3/14 , B22F3/24 , B22F2003/248 , B22F2999/00 , C22C38/002 , C22C38/005 , C22C38/10 , C22C2202/00 , H01F1/0576 , H01F1/0577 , H01F1/08 , B22F3/02 , B22F2201/00
Abstract: The present invention discloses a manufacturing method of green compacts of rare earth alloy magnetic powder and a manufacturing method of rare earth magnet, it is a manufacturing method that pressing the rare earth alloy magnetic powder added with organic additive in a closed space filled with inert gases to manufacture the green compacts, wherein the rare earth alloy magnetic powder is compacted under magnetic field in a temperature atmosphere of 25° C.-50° C. and a relative humidity atmosphere of 10%-40%. This method is to set the temperature of the inert atmosphere in a fully closed space, inhibiting bad forming phenomenon of the magnet with low oxygen content (broken, corner-breakage, crack) after sintering, and increasing the degree of orientation, Br and (BH)max.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.013 seconds)
