Preparation method of rare-earth permanent magnet material

一种制造方法、稀土永磁的技术，应用在磁性材料、电感/变压器/磁铁制造、磁性物体等方向，能够解决中重稀土化合物浪费、无法充分地利用中重稀土、渗透效果差等问题，达到降低剩磁温度系数和矫顽力温度系数、抗退磁能力改善、提高矫顽力的效果

Active Publication Date: 2015-12-23
BAOTOU TIANHE MAGNETICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above documents do not disclose or imply that the mixed solution containing medium and heavy rare earth elements is atomized and then sprayed on the surface of the magnet, so that the medium and heavy rare earth elements cannot be fully utilized.
[0006] CN10170107A discloses a method for manufacturing a high remanence and high coercivity rare earth permanent magnet material, wherein the magnet is buried in the mixed powder for infiltration, but the infiltration effect of this manufacturing method is poor, and the waste of medium and heavy rare earth compounds is serious

Method used

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Embodiment 1

[0091] The manufacture method of the rare earth permanent magnet material of embodiment 1, its technological process is as follows:

[0092] S1) Magnet manufacturing process:

[0093] S1-1) Smelting process: in terms of atomic percentage, according to 13.8% of Nd, 0.2% of Dy, 0.15% of Cu, 1.2% of Co, 0.3% of Al, 5.85% of B, 0.1% of Ga and the balance Prepare raw materials with Fe, put the raw materials into a vacuum intermediate frequency quick-setting induction furnace, vacuumize to less than 1Pa, fill with argon protection for heating and melting, pour the melted alloy liquid on the rotating cooling copper roller, and prepare a thickness of 0.3 mm alloy sheet;

[0094] S1-2) Powder making process: In the hydrogen crushing furnace, the alloy flakes obtained from the smelting process S1-1) are subjected to low-temperature hydrogen absorption and high-temperature dehydrogenation to form coarse magnetic powder, and then the coarse magnetic powder is used as a medium in the jet ...

Embodiment 2

[0104] The manufacture method of the rare earth permanent magnet material of embodiment 2, its technological process is as follows:

[0105]S1) Magnet manufacturing process: Same as the magnet manufacturing process S1) of Example 1.

[0106] S2) Atomization and spraying process: the sintered rare earth magnet sample obtained by the magnet manufacturing process S1) without aging treatment is put into the sample as attached figure 1 In the atomized spraying device shown, anhydrous ethanol + terbium oxide (TbO 3 ) solution (containing 0.5 g of terbium oxide per milliliter of absolute ethanol) atomized and sprayed on the sintered rare earth magnet sample, and then put the sample into an oven and bake it at 130°C for 2 hours;

[0107] S3) Infiltration process: put the sample obtained by the atomization spraying process S2) into a stainless steel airtight container, and put the stainless steel airtight container into a vacuum infiltration furnace, and evacuate until the absolute va...

Embodiment 3

[0111] The manufacturing method of the rare earth permanent magnet material of embodiment 3, its process flow is as follows: S1) magnet manufacturing process: same as the magnet manufacturing process S1) of embodiment 1.

[0112] S2) Atomization and spraying process: the sintered rare earth magnet sample obtained by the magnet manufacturing process S1) without aging treatment is put into the sample as attached figure 1 In the shown device, gasoline + terbium fluoride (TbF 3 ) solution (0.5 grams of terbium fluoride per milliliter of gasoline) was sprayed on the sintered rare earth magnet sample after atomization, and then the sample was put into an oven and baked at 130°C for 2 hours;

[0113] S3) Infiltration process: put the sample obtained by the atomization spraying process S2) into a stainless steel airtight container, and put the stainless steel airtight container into a vacuum infiltration furnace, and evacuate until the absolute vacuum degree is less than 5.0×10 -5 At...

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Abstract

The invention provides a preparation method of a rare-earth permanent magnet material. The preparation method provided by the invention comprises an atomized spray coating process and a permeation process, wherein a sintered rare-earth magnet which is subject to atomized spray coating is put into a closed container before permeation; a solution containing a heavy rare-earth element is subjected to atomized spray coating on the surface of the sintered R1-Fe(Co)-B-A-X-M rare-earth magnet; and heat treatment is carried out after baking, so that the heavy rare-earth element which is subjected to spray coating permeates into a grain-boundary phase of the sintered rare-earth magnet. Compared with a traditional technology, according to the preparation method provided by the invention, the amount of the heavy rare-earth element is reduced; the production cost is reduced; in addition, the coercive force of the magnet can be greatly improved under the premise of slightly reducing the residual magnetism; the residual magnetism temperature coefficient and the coercive force temperature coefficient of the magnet are obviously lowered; and the anti-demagnetization capability of the magnet at high temperature is obviously improved.

Description

technical field [0001] The invention relates to a method for manufacturing a rare earth permanent magnet material, in particular to a method for manufacturing a sintered R1-Fe(Co)-B-A-X-M system rare earth permanent magnet. Background technique [0002] Take Nd 2 Fe 14 R1-Fe(Co)-B-A-X-M series rare earth sintered magnets with B-type compounds as the main phase are widely used in many fields such as electronics, automobiles, computers, energy, machinery, and medical equipment. When sintered magnets are used in various devices such as motors, in order to adapt to the conditions of use at high temperatures, the magnets are required to have good temperature resistance, low temperature coefficient, and small remanence and coercivity attenuation of the magnets at high temperatures. At present, the traditional process is to add medium and heavy rare earth metals to increase the coercive force of the magnet during the smelting process. However, the substitution of medium and heavy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02B22F3/16B22F3/24
CPCH01F1/0577H01F41/0293B22F3/24B22F9/023B22F9/04B22F2003/248B22F2009/044H01F1/0536H01F1/055
Inventor 刁树林董义武志敏伊海波范跃林苗聚昌吴树杰袁易陈雅袁文杰
Owner BAOTOU TIANHE MAGNETICS TECH CO LTD
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