公开(公告)号：US20150357119A1

公开(公告)日：2015-12-10

申请号：US14758696

申请日：2013-12-31

Applicant: XIAMEN TUNGSTEN CO., LTD.

Inventor： Hiroshi NAGATA ,  Chonghu WU

IPC: H01F41/02 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  H01F1/057 ,  C22C1/04 ,  B22F9/04 ,  C22C38/12 ,  H01F1/055 ,  C22C38/16 ,  C22C38/00

CPC classification number: H01F41/0293 ,  B22F9/04 ,  B22F9/12 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/04 ,  C22C33/02 ,  C22C33/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/007 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  H01F1/0557 ,  H01F1/057 ,  H01F1/0572 ,  H01F1/0577 ,  B22F9/023 ,  B22F3/02 ,  B22F3/04 ,  B22F3/101 ,  B22F2003/248 ,  B22F2003/247 ,  B22F2201/20 ,  B22F2201/11 ,  B22F2202/05 ,  B22F2009/044 ,  B22F1/0018

Abstract: A manufacturing method of a powder for rare earth magnet and the rare earth magnet based on evaporation treatment, includes the steps of: coarsely crushing an alloy for the rare earth magnet and then finely crushing to obtain a fine powder; and evaporating the fine powder and an evaporation material in vacuum or in inert gas atmosphere; wherein the weight ratio of the evaporation material evaporated to the fine powder and the fine powder is 10-6˜0.05:1. By adding the process of evaporation treatment of fine powder before the process of compacting under a magnetic field and after the process of fine crushing, the sintering property of the powder is changed drastically; a magnet with a high coercivity, a high squareness and a high heat resistance is obtained.

Abstract translation: 稀土类磁粉粉末和稀土类磁体的蒸镀处理的制造方法，包括以下步骤：将稀土类磁体的合金粗粉碎，然后进行细粉碎，得到细粉末。 并在真空或惰性气体气氛中蒸发细粉和蒸发材料; 其中蒸发物质与细粉末和细粉末的重量比为10-6〜0.05:1。 通过在磁场压实过程之前加入细粉末蒸发处理工艺，经过细粉碎处理后，粉末的烧结性能发生显着变化; 得到矫顽磁力高，矩形度高，耐热性高的磁铁。

公开(公告)号：US20150364234A1

公开(公告)日：2015-12-17

申请号：US14758698

申请日：2013-12-30

Applicant: XIAMEN TUNGSTEN CO., LTD.

Inventor： Hiroshi NAGATA ,  Chonghu WU

IPC: H01F1/057 ,  B22F9/04 ,  C21D1/773 ,  C21D6/00 ,  C22C38/16 ,  C22C38/12 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C22C38/54 ,  C22C38/44 ,  C22C38/02 ,  C22C38/32 ,  C22C38/28 ,  C22C38/18 ,  C22C38/14 ,  H01F41/02 ,  H01F1/053 ,  B22F3/16

CPC classification number: H01F1/057 ,  B22F1/0003 ,  B22F1/0085 ,  B22F3/162 ,  B22F9/04 ,  B22F2009/044 ,  B22F2999/00 ,  C21D1/773 ,  C21D6/00 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/007 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/28 ,  C22C38/32 ,  C22C38/44 ,  C22C38/54 ,  C22C2202/02 ,  H01F1/0536 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0293 ,  B22F3/02 ,  B22F2202/05

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.

Abstract translation: 基于细粉末的热处理的稀土类磁铁的制造方法，其特征在于，首先将稀土类磁体的合金粗粉碎，然后通过喷射研磨精细粉碎，得到细粉末; 在真空中或在惰性气体气氛中，在100℃〜1000℃的温度下将细粉末加热6分钟至24小时; 然后将细粉末在磁场下压实，并在950℃-1140℃的温度下在真空或惰性气体气氛中烧结，得到烧结磁体; 并加工烧结磁体以获得磁体; 那么磁铁在700℃〜1020℃的温度下进行RH晶界扩散。在所有粉末的表面上形成氧化膜。

公开(公告)号：US20150340136A1

公开(公告)日：2015-11-26

申请号：US14758699

申请日：2013-12-30

Applicant: XIAMEN TUNGSTEN CO., LTD.

Inventor： Hiroshi NAGATA ,  Chonghu WU

IPC: H01F1/057 ,  C22C38/12 ,  C22C38/10 ,  C22C38/06 ,  C22C38/04 ,  B22F1/00 ,  C22C38/54 ,  C22C38/44 ,  C22C38/02 ,  C22C38/32 ,  C22C38/28 ,  C22C38/14 ,  C22C38/16 ,  C22C38/00

CPC classification number: H01F1/057 ,  B22F1/0003 ,  B22F1/0085 ,  B22F3/162 ,  B22F9/04 ,  B22F2009/044 ,  B22F2999/00 ,  C21D1/773 ,  C21D6/00 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/007 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/28 ,  C22C38/32 ,  C22C38/44 ,  C22C38/54 ,  C22C2202/02 ,  H01F1/0536 ,  H01F1/0577 ,  H01F41/0266 ,  H01F41/0293 ,  B22F3/02 ,  B22F2202/05

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.

Abstract translation: 稀土类磁铁合金粉末和稀土类磁体的制造方法如下：将稀土类磁体的合金粗粉碎，然后用喷射研磨精细粉碎，得到细粉末; 通过在真空中或在惰性气体气氛中在100℃〜1000℃的温度下加热6分钟至24小时来获得细粉末。 细粉末的热处理是在磁场压实过程之前的细碎的喷射研磨过程之后进行的，从而粉末的烧结性能发生显着变化，得到矫顽磁力高的磁体 平方度和高耐热性。

公开(公告)号：US20150302960A1

公开(公告)日：2015-10-22

申请号：US14441944

申请日：2013-11-08

Applicant: XIAMEN TUNGSTEN CO., LTD.

Inventor： Hiroshi NAGATA ,  Chonghu WU

IPC: H01F1/057 ,  C21D6/00 ,  C22C1/06 ,  C22C38/00 ,  C22C38/16 ,  C22C38/14 ,  C22C38/06 ,  C22C33/00 ,  B22F9/04 ,  B22F3/12 ,  B22F3/04 ,  H01F1/08 ,  H01F1/053 ,  H01F1/055 ,  H01F41/02 ,  C21D3/06

CPC classification number: H01F1/0573 ,  B22F3/04 ,  B22F3/12 ,  B22F9/04 ,  B22F2999/00 ,  C21D3/06 ,  C21D6/007 ,  C22C1/06 ,  C22C33/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/007 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0536 ,  H01F1/0557 ,  H01F1/0577 ,  H01F1/086 ,  H01F41/0266 ,  B22F2009/045 ,  B22F2201/013

Abstract: The present invention discloses manufacturing methods of a powder for compacting rare earth magnet and rare earth magnet that omit jet milling process, which comprise 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 hydrogen under a hydrogen pressure between 0.01˜1 MPa for 0.5˜24 h to obtain the powder. The present invention improves the manufacturing processes which are before the process of jet milling for omitting the process of jet milling, thus simplifying the process; which may also acquire a low cost production by efficiently using the precious rare earth resource.

Abstract translation: 本发明公开了一种用于压实稀土磁体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：通过带式铸造法将稀土磁体原料的熔​​融合金铸造成 获得平均厚度在0.2〜0.4mm范围内的淬火合金; 2）氢气爆裂：在0.01〜1MPa的氢气压力下将淬火的合金氢气破裂0.5〜24h，得到粉末。 本发明改进了在喷射研磨过程之前的制造过程，以省略喷射铣削的过程，从而简化了工艺过程; 也可以通过有效利用稀土资源获得低成本生产。