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A lanthanon permanent magnetic powder and its making method

A rare earth permanent magnet and magnetic powder technology, which is applied in the direction of magnetic materials, magnetic objects, and inorganic materials, can solve the problems of high price of rare earth metal Nd, high price of rare earth permanent magnet powder, and poor coercive force of rare earth permanent magnet powder. Achieve good market application prospects, high cost performance, and improve the effect of coercive force

Inactive Publication Date: 2008-08-13
绵阳西磁科技开发公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rare earth metal Nd used in this patented technology is expensive, which increases the price of rare earth permanent magnetic powder and limits the scope of application
At the same time, the metal Zr content in the ingredients is low, and the coercive force of the rare earth permanent magnet powder produced by arc remelting and quick quenching is poor

Method used

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  • A lanthanon permanent magnetic powder and its making method
  • A lanthanon permanent magnetic powder and its making method
  • A lanthanon permanent magnetic powder and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation by arc remelting and rapid quenching

[0032] The used metal batching composition of the present embodiment is: (Nd 0.49 La 0.51 ) 12.7 Fe 76.4 B 7.7 Zr 3.2

[0033] The total mass percentage of pure metal and mixed rare earth elements in the ingredients is: Nd: 13.95wt% La: 13.92wt% Fe: 66.31wt% B: 1.29wt% Zr: 4.53wt%, the preparation process of the arc remelting and rapid quenching method is as follows:

[0034] (1) Alloy melting and crushing

[0035]After the above raw materials are prepared according to the ingredients, they are melted and cast into alloy ingots in a vacuum induction melting furnace. The smelted alloy ingot is broken into alloy particles of <10mm by jaw crusher.

[0036] (2) Rapid Quenching Milling

[0037] Put the broken alloy particles into the vacuum arc quenching furnace and vacuumize. After the vacuum is lower than 10Pa, fill Ar gas to -0.04MPa~0.2MPa, start arc quenching, and the linear speed of the roller is 15...

Embodiment 2

[0045] Example 2 Preparation by induction remelting and rapid quenching

[0046] The used metal batching composition of the present embodiment is: (Nd 0.49 La 0.51 ) 12.7 Fe 76.4 B 7.7 Zr 3.2

[0047] The total mass percentage of pure metals and mixed rare earth elements in the ingredients is: Nd: 13.95wt% La: 13.92wt% Fe: 66.31wt% B: 1.29wt% Zr: 4.53wt%, made by induction remelting and rapid quenching process including the following step:

[0048] (1) Alloy smelting

[0049] After the above raw materials are prepared according to the ingredients, they are melted and cast into alloy ingots in a vacuum induction melting furnace.

[0050] (2) Rapid Quenching Milling

[0051] Put the melted alloy ingot into the vacuum induction quenching furnace, pump the vacuum to below 10Pa, start the intermediate frequency and high frequency melting bag, after the alloy ingot is melted, fill it with Ar gas to -0.04MPa~0.2MPa, after melting The molten metal flows through the nozzle to...

Embodiment 3

[0059] Example 3 Preparation by Arc Remelting and Rapid Quenching

[0060] The used metal batching composition of the present embodiment is: (Nd 0.61 La 0.39 ) 11.6 Fe 77.6 B 7.6 Zr 3.2

[0061] The total mass percentage of pure metal and mixed rare earth elements in the batch is: Nd: 16.05wt% La: 9.89wt% Fe: 68.18wt% B: 1.29wt% Zr: 4.59wt%, the implementation process is as in Example 1.

[0062] After testing, the performance of the quenching magnet is:

[0063] B r : 597.10mT H cj : 707.17kA / m (BH) max : 57.761kJ / m 3 h k : 206.79kA / m

[0064] The test curve is shown in Figure 3

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Abstract

The present invention provides a rare-earth permanent-magnetic powder and the preparing method thereof. The basic representation of the rare-earth permanent-magnetic powder is as follows: (R<1-a>La)uFe<100-u-x-y>MxBy, wherein R is Nd, Pr or NdPr or the mixed rare earth metal alloy which is mainly La, Ce and Nd. La is metal lanthanum element. Fe is metal iron element. M is metal Zr, Hf, Nb, V or the alloy. B is boron element. The rare-earth permanent-magnetic powder of the invention can be prepared with arc remelting fast quenching method or induction remelting fast quenching method. Under the condition that the Nd content is reduced greatly, the invention keeps higher synthetic magnetic character and has better temperature stability. After the 150 DEG C high temperature aging experiment, the irreversible flux loss is only 3to 5 The performance-price ratio of the rare-earth permanent-magnetic powder of the invention is higher and the invention has better market applying prospect.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation, and in particular relates to a rare earth permanent magnetic powder and a preparation method thereof. Background technique [0002] NdFeB permanent magnet material is a magnetic material with better magnetic properties at present. NdFeB permanent magnet materials are divided into sintered NdFeB permanent magnet materials and bonded NdFeB permanent magnet materials. Bonded NdFeB permanent magnet materials can be made into various thin-walled, special-shaped and multi-pole magnets due to their good forming and multi-pole magnetization characteristics. It is mainly used in fields such as motors. [0003] The bonded NdFeB permanent magnet material is formed by bonding NdFeB permanent magnet powder, and the NdFeB permanent magnet powder is produced by a rapid quenching method. The microstructure of NdFeB permanent magnetic powder is composed of nanocrystals, and the main cryst...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/06B22F9/06
Inventor 王永强李兆波李世贵赵淳
Owner 绵阳西磁科技开发公司
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