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High-performance NdFeB permanent magnet material and preparation method thereof

A permanent magnet material, neodymium iron boron technology, applied in the direction of magnetic materials, inductors/transformers/magnet manufacturing, magnetic objects, etc., can solve the problems of unsatisfactory performance, large usage, low magnetic performance, etc., and achieve the maximum magnetic energy product , low price and cost, and the effect of improving impact toughness

Active Publication Date: 2018-06-22
宁波雄海稀土速凝技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, most of the permanent magnet materials with relatively low magnetic properties are used in the Chinese market. Due to the unsatisfactory performance during use, it will cause a large amount of use and increase the cost.

Method used

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  • High-performance NdFeB permanent magnet material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] The permanent magnet material is composed of the following components in weight percentage: PrNd: 32%, Gd1%, Ga 0.1%, Zr0.1%, B 1%, Co0.3%, Al 0.3%, Cu 0.08%, Mo0. 15%, Ti 0.1%, LaCe 0.3%, and the balance is Fe.

[0024] The above-mentioned PrNd in the present invention is a PrNd alloy, wherein the Nd content is 2%.

[0025] The present invention also provides a method for preparing the above-mentioned NdFeB permanent magnet material, the preparation steps are:

[0026] (1) According to the composition and mass percentage of NdFeB magnets, the raw materials are mixed and smelted. After the smelting is complete, it is poured and cooled to form strips;

[0027] (2) carrying out hydrogen crushing and jet milling to the above-mentioned obtained strips to make powder;

[0028] (3) Putting the above-mentioned powder into a forming press mold under the protection of an inert gas and applying a magnetic field to carry out orientation, and press molding after orientation;

[...

Embodiment 2

[0035] The permanent magnet material is composed of the following components in weight percentage: PrNd: 32.5%, Gd 0.70%, Ga0.09%, Zr 0.08%, B 1.0%, Co 0.30%, Al 0.30%, Cu0.08%, Mo0 .20%, Ti 0.20%, LaCe 0.3%, and the balance is Fe.

[0036] Method is with embodiment 1.

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Abstract

The invention relates to a high-performance Nd-Fe-B permanent magnet material. The permanent magnet material is characterized by comprising the following constituents by weight percent: 31-35% of PrNd, 0.5-1% of Gd, 0.05-0.15% of Ga, 0.05-0.15% of Zr, 0.8-1.6% of B, 0.2-0.5% of Co, 0.1-0.4% of Al, 0.05-0.2% of Cu, 0.05-0.3% of Mo, 0.05-0.3% of Ti and 0.1-0.5% of LaCe with the balance being Fe. In the permanent magnet material, the PrNd content and the Nd content are reasonably controlled, meanwhile, elements such as rear earth and Zr are added, thus, the integral maximum magnetic energy product of a magnet is improved, the usage amount of the magnet is reduced, and the permanent magnet material is lighter and is lower in cost.

Description

technical field [0001] The invention relates to the technical field of permanent magnet materials, in particular to a high-performance (maximum energy product of more than 390MGOe) NdFeB permanent magnet material and a preparation method thereof. Background technique [0002] NdFeB magnets are by far the strongest permanent magnets. NdFeB is called the third-generation rare earth permanent magnet material, and it is the permanent magnet material with the highest magnetic energy product today. In 1983, it was first successfully developed by Sumitomo Special Metals Corporation of Japan and General Motors Corporation of the United States. With the development of industries such as computers and communications, the preparation and application of NdFeB permanent magnet materials have developed rapidly. Its application can greatly reduce the volume and quality of the whole machine, such as the application on the disk, which can make the disk drive miniaturized and have better per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0573H01F1/0576H01F1/0577H01F41/0266
Inventor 路河树
Owner 宁波雄海稀土速凝技术有限公司
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