A kind of neodymium iron boron material and its preparation method and application

A kind of NdFeB technology, which is applied in the direction of magnetic materials, inductors/transformers/magnet manufacturing, magnetic objects, etc., can solve the problems of magnet performance deterioration, and achieve uniform magnetic performance, good magnetic performance, and good temperature stability. Effect

Active Publication Date: 2021-07-30
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD
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  • 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 magnet performance deterioration caused by low B system (B<5.88at%) in the prior art, and provide a kind of NdFeB material and its preparation method and application

Method used

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  • A kind of neodymium iron boron material and its preparation method and application
  • A kind of neodymium iron boron material and its preparation method and application
  • A kind of neodymium iron boron material and its preparation method and application

Examples

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Effect test

Embodiment 1～25 and comparative example 1～9

[0283] The raw materials used to prepare NdFeB materials in Examples 1-25 and Comparative Examples 1-9 are shown in Table 1, and the preparation process is as follows:

[0284] (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.

[0285] (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.

[0286] (3) Hydrogen crushing process: Vacuumize the hydr...

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Abstract

The invention discloses a neodymium iron boron material, a preparation method and application thereof. The raw material composition of the NdFeB material includes the following components in mass content: R: 28.5-33.0%; R is a rare earth element containing at least Nd; Cu: 0.45-2% but not 0.45%; B: 0.84-0.94% %; Al: 0.05-0.07%; Co: ≤2.5% but not 0; Fe: 62-70%; N: one or more of Ti, Zr and Nb; when N contains Ti, the Ti The content of Zr 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%; The mass percent of the total mass of the composition. The magnetic properties of the neodymium-iron-boron material of the present invention are better, and the magnetic properties of the same batch of products are uniform.

Description

technical field [0001] The invention relates to a neodymium-iron-boron material and a preparation method and application thereof. 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] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0266
Inventor 付刚刘少伟黄佳莹黄清芳许德钦
Owner FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD
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