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High-coercivity sintered R-T-B permanent magnet material and manufacturing method therefor

An R-T-B, permanent magnet material technology, applied in the direction of magnetic material, inorganic material magnetism, metal material coating process, etc., can solve the problems of high process cost, low effective utilization rate of rare earth elements, etc., and achieve the effect of low rare earth content

Inactive Publication Date: 2017-07-04
NINGBO KONIT IND +1
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Problems solved by technology

[0007] The purpose of this invention is to provide a kind of method and R-T-B series permanent magnet material of making high coercive force R-T-B series permanent magnet material, solve the effective utilization rate of the rare earth element existing in the coercive force aspect that solves the existing technology of R-T-B series rare earth permanent magnet material The problem of low cost and high process cost

Method used

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  • High-coercivity sintered R-T-B permanent magnet material and manufacturing method therefor
  • High-coercivity sintered R-T-B permanent magnet material and manufacturing method therefor
  • High-coercivity sintered R-T-B permanent magnet material and manufacturing method therefor

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Embodiment 3

[0055] Experiment 3 Utilizes the method provided by the present invention to make a magnet sample containing Dy, except for steps A, B, and C, the equipment and experimental conditions used are the same as those of Comparative Examples 1 and 2, and the specific steps are as follows:

[0056] Firstly, the Nd-Fe-B alloy was made by strip-spinning process, and its composition ratio was 31.0% Nd, 65.7% Fe, 1.0% Co, 0.1% Cu, 0.1% Al, 0.1% Zr, 1.0% B;

[0057] Then, the alloy is subjected to hydrogen explosion treatment, and about 0.1% lubricant is added to the obtained coarse powder and mixed;

[0058] Then, the above coarse powder is pulverized with a jet mill to obtain a fine powder whose average particle size is 3.0 μm;

[0059] Then, the fine powder is subjected to orientation compression molding under a magnetic field of 1.9T;

[0060] Then, the formed blank is placed in a high vacuum sintering furnace, sintered at a temperature of 1080°C, and then aged at 900°C and 500°C res...

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Abstract

The invention discloses a high-coercivity sintered R-T-B permanent magnet material and a manufacturing method therefor. The manufacturing method comprises the following steps of A, preparing spherical powder comprising heavy rare earth elements; and B, coating an R-T-B series permanent magnet material manufactured by a normal process with the spherical powder comprising heavy rare earth elements in a laser coating mechanism. By virtue of the manufacturing method for the high-coercivity R-T-B series permanent magnet material provided by the invention, the magnet coercivity can be remarkably improved without influencing remanence, and meanwhile, the usage amount of the heavy rare earth elements is obviously lowered.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet materials, and in particular relates to a method for manufacturing high-coercivity sintered R-T-B permanent magnet materials and R-T-B permanent magnet materials. Background technique [0002] Sintered R-T-B series rare earth permanent magnet materials are widely used as the permanent magnet materials with the strongest magnetic properties. Coercive force is a very important performance index to measure the working stability of sintered R-T-B permanent magnet materials, and one of the most important means to improve the coercive force of magnets is to add heavy rare earth elements to the materials. However, heavy rare earth elements are very expensive due to the scarcity of reserves, difficulty in refining, and easy pollution of the environment. Even in the case of relatively small additions, they still occupy a very important part of the cost of magnet raw materials. [0003] Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F1/06C23C4/123C23C4/06
CPCC23C4/06H01F1/0572
Inventor 黄浩罗天勇姚宇良
Owner NINGBO KONIT IND
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