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NdFeB magnet material, raw material composition, preparation method and application

A raw material composition, NdFeB technology, applied in the manufacturing of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of rare and expensive heavy rare earth metals, and achieve improved grain boundary continuity and good adaptability Effect

Active Publication Date: 2022-08-02
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects that heavy rare earth metals need to be used in the existing double alloy method, and heavy rare earth metals are expensive and rare, and provide a kind of NdFeB magnet material, raw material composition, preparation method, application

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  • NdFeB magnet material, raw material composition, preparation method and application
  • NdFeB magnet material, raw material composition, preparation method and application
  • NdFeB magnet material, raw material composition, preparation method and application

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preparation example Construction

[0129] The preparation method of NdFeB permanent magnet material is as follows:

[0130] In the examples and comparative examples of the present invention, the introduced carbon impurities and oxygen impurities are conventional in the art.

[0131] (1) Smelting and casting process: According to the formula in Tables 1 and 2 and the ratio in Table 3, get the composition of the corresponding ratio and put it into a vacuum melting furnace at 5 × 10 -2 Vacuum smelting was carried out at a temperature of 1500°C in a vacuum of Pa; then the melts obtained by smelting were respectively cast by the thin strip continuous casting method to obtain the main alloy sheet A and the main alloy sheet B.

[0132] (2) Hydrogen breaking powdering process: at room temperature, place the main alloy sheet A and the main alloy sheet B in step (1) in the hydrogen breaking furnace, vacuumize, and then pass into the hydrogen breaking furnace with a purity of 99.9% hydrogen, maintain a hydrogen pressure ...

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Abstract

The invention discloses a neodymium iron boron magnet material, its raw material composition, its preparation method and application. The raw material composition includes R1, 0.2 to 1 mas%, in the main alloy A, which includes R A , and R A Including Nd, R A , 27.5~28.5mas%; N1, 0~0.3mas%; B, 0.94~1.1mas%; Fe, 60~71.5mas%; the sum of each component is 100mas%; in the main alloy B, it includes R B , and R B Including Nd, R B , 29~31mas%; N2, 0~0.3mas%; B, 0.85~1mas%; Fe, 60~70mas%; the contents of N1 and N2 are not 0 at the same time; the mass ratio of main alloy A and main alloy B is 50 :50~95:5. The NdFeB magnet material prepared from the raw material composition has improved grain boundary continuity, reduced triangular area area and reduced temperature coefficient.

Description

technical field [0001] The invention specifically relates to a NdFeB magnet material, a raw material composition, a preparation method and an application. Background technique [0002] Because NdFeB rare earth magnet materials have the characteristics of high remanence, high coercivity and high magnetic energy product, they are widely used in power electronics, communications, information, motors, transportation, office automation, medical equipment, military and other fields, and make The market application of some small, highly integrated high-tech products is possible, such as voice coil motor (VCM) for hard disk, hybrid electric vehicle (HEV), electric vehicle, etc. To meet the above market demands, it is necessary to prepare NdFeB magnets with high remanence and high coercivity at a lower cost. [0003] At present, the methods for preparing NdFeB permanent magnets in the prior art mainly include the following two: [0004] 1) Single alloy preparation process: using Tb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02B22F1/00C22C33/02C22C38/00C22C38/04C22C38/08C22C38/10C22C38/12C22C38/14C22C38/16C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/30C22C38/32C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C22C38/60
CPCB22F1/0003H01F1/0576H01F1/0577H01F41/0253H01F41/0266H01F41/0293H01F41/0273C22C38/005C22C38/002C22C38/008C22C38/16C22C38/007C22C38/60C22C38/14C22C38/10C22C38/105C22C38/08C22C38/12C22C38/32C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/30C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/52C22C38/54C22C33/0278
Inventor 骆溁师大伟廖宗博陈志庆黄佳莹
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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