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R-T-B series permanent magnet material and preparation method and application thereof

A technology of R-T-B and permanent magnet materials, which is applied in the direction of magnetic materials, inductors/transformers/magnets, magnetic objects, etc., and can solve problems such as poor performance of magnets

Active Publication Date: 2020-06-05
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 defect of poor magnet performance when B<5.88at% in the prior art, and provide a R-T-B permanent magnet material and its preparation method and application

Method used

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  • R-T-B series permanent magnet material and preparation method and application thereof
  • R-T-B series permanent magnet material and preparation method and application thereof
  • R-T-B series permanent magnet material and preparation method and application thereof

Examples

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Embodiment 1～20 and comparative example 1～7

[0281] The raw materials used for preparing the R-T-B series permanent magnet material in Examples 1-20 and Comparative Examples 1-7 are as shown in Table 1, and the technology for its preparation is as follows:

[0282] (1) Melting process: according to the formula shown in Table 1, take the prepared raw materials and put them into a crucible made of alumina, and put them in a high-frequency vacuum induction melting furnace at 5×10 -2 Vacuum smelting at a temperature below 1500°C in a vacuum of Pa to obtain a melt.

[0283] (2) Casting process: Ar gas is introduced into the smelting furnace after vacuum smelting to make the air pressure reach 55,000 Pa, and then the casting is carried out, and the molten liquid is passed through a copper roller with a speed of 29 rpm to obtain a speed of 0.12-0.35mm thickness. Condensed gold sheet, during the casting process, the copper roller needs to be fed with chilled water, and the temperature of the water inlet is ≤25°C.

[0284] (3) H...

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Abstract

The invention discloses an R-T-B series permanent magnet material and a preparation method and application thereof. The raw material composition of the R-T-B series permanent magnet material is prepared from the following components in percentage by mass: 28.5 to 33.0 percent of R; ga:>0.5%; cu: > = 0.4%; b: 0.84%-0.94% of the total weight of the raw materials; 0.05 to 0.07% of Al; co: < = 2.5% but not 0; 60 to 70 percent of Fe; n is one or more of Ti, Zr and Nb; when N contains Ti, the content of Ti is 0.15%-0.25%; when N contains Zr, the content of Zr is 0.2%-0.35%; when N contains Nb, the content of Nb is 0.2%-0.5%; wherein the percentage is the mass percentage of each component in the total mass of the raw material composition. The R-T-B series permanent magnet material disclosed by the invention is relatively good in magnetic performance, and the magnetic performance of the same batch of products is uniform.

Description

technical field [0001] The invention relates to an R-T-B series permanent magnet material and its preparation method and application. Background technique [0002] R-T-B series sintered magnets (R refers to rare earth elements, T refers to transition metal elements and the third main group metal elements, B refers to boron elements) are widely used in electronic products, automobiles, wind power, home appliances, elevators and Industrial robots and other fields, such as hard disks, mobile phones, earphones, and permanent magnet motors such as elevator traction machines and generators, are used as energy sources. requirements are gradually increasing. [0003] In order to increase the remanence of R-T-B sintered magnets, it is usually necessary to reduce the B content. But when the content of B is at a lower level, R will be formed 2 T 17 Mutually. while R 2 T 17 There is no uniaxial anisotropy at room temperature, which degrades the performance of the magnet. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0266
Inventor 付刚黄吉祥黄佳莹陈大崑黄清芳
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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