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Neodymium iron boron material and preparation method and application thereof

A kind of NdFeB technology, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as the deterioration of magnet performance

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 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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  • Neodymium iron boron material and preparation method and application thereof
  • Neodymium iron boron material and preparation method and application thereof
  • Neodymium iron boron material and preparation method and application thereof

Examples

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Embodiment 1～25 and comparative example 1～9

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

[0284] (1) Smelting process: According to the formula shown in Table 1, take the prepared raw materials and put them into a crucible made of alumina. -2 In a vacuum of Pa, vacuum melting was performed at a temperature of 1500° C. or lower 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, then casting is performed, and the molten liquid is passed through a copper roller with a rotating speed of 29 rpm to obtain a speed of 0.12-0.35mm thickness. To condense the alloy sheet, during the casting process, the copper roll needs to be fed with chilled water, and the water inlet temperature is less than or equal to 25°C.

[0286] (3) The process of hydrogen breaking and pulverization: at room t...

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Abstract

The invention discloses a neodymium iron boron material and a preparation method and application thereof. The raw material composition of the neodymium-iron-boron material comprises the following components in percentage by mass: 28.5-33.0% of R and the balance of Fe and inevitable impurities, r is a rare earth element at least containing Nd; 0.45%-2% of Cu, but not 0.45% of Cu; b: 0.84%-0.94% ofthe total weight of the raw materials; 0.05 to 0.07% of Al; co: < = 2.5% but not 0; 62 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 neodymium iron boron material is good in magnetic performance, and the magnetic performance of products of the same batch is uniform.

Description

technical field [0001] The present invention relates to a kind of neodymium iron boron 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 third main group metal elements, and 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, generators, etc., are used as energy sources, and their demand is expanding. requirements are gradually increasing. [0003] In order to improve the remanence of the R-T-B based sintered magnet, it is generally necessary to reduce the B content. But when the content of B is at a lower level, R is formed 2 T 17 Mutually. while R 2 T 17 It does not have room temperature uniaxial anisotropy, thereby...

Claims

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Application Information

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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 CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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