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Method for manufacturing high-performance NeFeB permanent-magnet material

A technology of permanent magnet material and manufacturing method, which is applied in the direction of magnetic material, inorganic material magnetism, magnetic object, etc., can solve the problems of coercive force and magnetic energy product of NdFeB permanent magnet material can not meet the actual needs, and achieves the improvement of molecular weight. Effects of anisotropic field, improved coercivity, and improved performance

Active Publication Date: 2010-05-19
BAOTOU TIANHE MAGNETICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of science and technology, the application range of NdFeB permanent magnet materials has been expanded, and higher requirements have been put forward for the coercive force and magnetic product energy of NdFeB permanent magnet materials in some fields. Therefore, , the coercivity and magnetic energy product of the NdFeB permanent magnet materials produced according to the existing NdFeB permanent magnet material manufacturing methods cannot meet the actual needs more and more, so there is an urgent need for a method that can improve the NdFeB permanent magnet. Coercive force and magnetic energy product properties of materials and manufacturing methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Produced in the following steps:

[0019] (1) the following raw materials by weight: 26.845% neodymium (Nd), 66.200% iron (Fe), 0.989% boron (B), 3.223% dysprosium (Dy), 1.212% terbium (Tb) , 1.079% cobalt (Co), 0.452% aluminum (Al) are mixed together for batching;

[0020] (2) Put the raw materials prepared in step (1) into the vacuum intermediate frequency induction furnace, adjust the pressure of the vacuum intermediate frequency induction furnace, when the vacuum degree reaches 2.1×10 -2 Under the condition of Pa, the raw materials in the furnace are heated and melted, and at the same time, an atmospheric pressure of Ar gas is filled for refining, and then the hydrogenated alloy ingot is cast in the hydrogen crushing furnace, and the hydrogenated alloy ingot is ground into an average particle size in the jet mill. 3.75μm magnetic powder, orientated and pressed into a formed magnetic alloy in a magnetic field with a magnetic field strength of 1.45KOe;

[0021] (3) ...

Embodiment 2

[0025] Produced in the following steps:

[0026] (1) the following raw materials by weight: by 16.952% neodymium (Nd), 64.873% iron (Fe), 0.998% boron (B), 10.913% dysprosium (Dy), 3.518% terbium (Tb ), 1.799% cobalt (Co), and 0.947% aluminum (Al) are mixed together for batching;

[0027] (2) Put the raw materials prepared in step (1) into the vacuum intermediate frequency induction furnace, adjust the pressure of the vacuum intermediate frequency induction furnace, when the vacuum degree reaches 2.1×10 -2 Under the condition of Pa, the raw materials in the furnace are heated and melted, and at the same time, an atmospheric pressure of Ar gas is filled for refining, and then the hydrogenated alloy ingot is cast in the hydrogen crushing furnace, and the hydrogenated alloy ingot is ground into an average particle size in the jet mill. 3.7μm magnetic powder, orientated and pressed into a formed magnetic alloy in a magnetic field with a magnetic field strength of 1.47KOe;

[002...

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PUM

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Abstract

The invention relates to a manufacturing method of a high performance Rb-Fe-B permanent magnetic material, comprising the steps of: mixing the following raw materials: 16.924 -30.855 by weight of Nd,53.364-80.132 by weight of Fe, 1.087-1.233 by weight of B, 0.817-6.952 by weight of Dy, 0.266-4.533 by weight of Tb, 0.593-2.101 by weight of Co, and 0.181-0.962 by weight of Al; refining; pressing; and sintering. Metal element Tb is added to partially replace metal element Nd. According to the manufactured permanent magnetic material, the molecul anisotropy field is improved, the coercive force of the b-Fe-B permanent magnetic material is increased, the effect to magnetic energy product is reduced, so that the performance of the Rb-Fe-B permanent magnetic material is greatly improved.

Description

technical field [0001] The invention relates to a manufacturing method of a permanent magnetic material, in particular to a manufacturing method of a high-performance NdFeB permanent magnetic material. Background technique [0002] At present, permanent magnet materials are widely used in many fields such as electronics, automobiles, computers, energy, machinery, medical equipment, etc., such as manufacturing various permanent magnet motors, vibration motors, permanent magnet instruments, electronics industry (magnetic rings on mobile phones, computers , magnetic column), automobile industry, petrochemical industry, nuclear magnetic resonance device, audio equipment (audio, earphone, loudspeaker, circular magnetic piece of magnetic vibrator), magnetic levitation system, permanent magnet crane, magnetic separator, magnetic transmission mechanism and magnetic Among them, NdFeB permanent magnet materials have the advantages of excellent magnetic properties and low price, and ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08B22F3/10
Inventor 袁文杰
Owner BAOTOU TIANHE MAGNETICS TECH CO LTD
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