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Neodymium iron boron magnet material, raw material composition and preparation method and application thereof

A raw material composition, NdFeB technology, applied in the direction of magnetic materials, magnetic objects, inductor/transformer/magnet manufacturing, etc., can solve the problems of rare and expensive heavy rare earth metals

Active Publication Date: 2020-09-01
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Neodymium iron boron magnet material, raw material composition and preparation method and application thereof
  • Neodymium iron boron magnet material, raw material composition and preparation method and application thereof
  • Neodymium iron boron magnet material, raw material composition and preparation method and application thereof

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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 impurity and oxygen impurity contents are conventional in the art.

[0131] (1) Melting and casting process: according to the formula in Table 1 and 2 and the ratio in Table 3, get the composition of corresponding proportion and put into vacuum melting furnace at 5 * 10 -2 Vacuum smelting is carried out at a temperature of 1500° C. in a vacuum of Pa; and then the melts obtained from the smelting are respectively cast by strip continuous casting method to obtain main alloy flakes A and master alloy flakes B.

[0132] (2) Hydrogen crushing process: at room temperature, the main alloy sheet A and the main alloy sheet B in the step (1) are placed in the hydrogen crushing furnace, vacuumized, and then introduced into the hydrogen crushing furnace with a purity of 99.9% hydrogen, maintain the pressure of hy...

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Abstract

The invention discloses a neodymium-iron-boron magnet material, a raw material composition and a preparation method and application thereof. The raw material composition comprises 0.2-1 mas% of R1, the main alloy A comprises RA, and the RA comprises: 27.5-28.5 mas% of Nd and RA; 0-0.3 mas% of N1; 0.94-1.1 mas% of B; 60-71.5 mas% of Fe, wherein the sum of the components is 100 mas%. The main alloyB comprises RB, and the RB comprises 29-31 mas% of Nd and RB; 0-0.3 mas% of N2; 0.85-1 mas% of B; 60-70 mas% of Fe, wherein the contents of N1 and N2 are not 0 at the same time; and the mass ratio ofthe main alloy A to the main alloy B is 50:50-95:5. The neodymium-iron-boron magnet material prepared from the raw material composition has the advantages that the grain boundary continuity is improved, the triangular area is reduced, and the temperature coefficient is reduced.

Description

technical field [0001] The invention specifically relates to a neodymium-iron-boron magnet material, a raw material composition, a preparation method and an application. Background technique [0002] Due to the characteristics of high remanence, high coercive force and high magnetic energy product, NdFeB rare earth magnet materials are widely used in power electronics, communications, information, motors, transportation, office automation, medical equipment, military and other fields. The market application of some small, highly integrated high-tech products has become possible, such as voice coil motors (VCM) for hard disks, hybrid electric vehicles (HEV), electric vehicles, etc. To meet the above market demands, it is necessary to prepare NdFeB magnets with both high remanence and high coercive force at a lower cost. [0003] At present, there are two main ways to prepare NdFeB permanent magnets in the prior art: [0004] 1) Single alloy preparation process: using Tb 2 ...

Claims

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Application Information

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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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