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A kind of high magnetic energy product neodymium iron boron permanent magnet material and preparation method thereof

A high magnetic energy product, permanent magnet material technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problems of inability to ensure the stability of material structure and performance, low magnetic energy product of materials, etc., to facilitate industrial production and preparation. The effect of simple process and good performance

Active Publication Date: 2016-06-01
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The above preparation method requires the material to undergo three high-temperature sintering and two aging treatments in a vacuum sintering furnace, but the high-temperature sintering method used cannot guarantee the stability of the material structure and performance, and the prepared material has a low magnetic energy product.

Method used

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  • A kind of high magnetic energy product neodymium iron boron permanent magnet material and preparation method thereof
  • A kind of high magnetic energy product neodymium iron boron permanent magnet material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] The preparation method of the high magnetic energy product NdFeB permanent magnet material of the present invention has the following specific steps:

[0027] (1) Take Pr5%, Nd20%, Cu0.7%, Ni2%, B1%, Bi1%, Ru0.3%, Tb0.5% according to the following weight percentages, and the rest is Fe for ingredients; among them, Pr, Nd The purity of Cu, Ni, B, Bi, Ru, Tb and Fe are all greater than 99.9%;

[0028] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1660℃, and let it stand for 2 minutes to obtain the master alloy liquid;

[0029] (3) Cast the master alloy liquid onto the roller under the tap hole of the induction furnace. The master alloy liquid encounters the rotating roller and is dragged by the roller flange to form a cast belt; the rotating linear velocity of the roller flange is 12m / s; the thickness of the cast strip is about 200μm and the width is about 10mm;

[0030] (4) Cool the cast strip naturally for 5 minutes, and th...

Embodiment 2

[0035] The preparation method of the high magnetic energy product NdFeB permanent magnet material of the present invention has the following specific steps:

[0036] (1) Take Pr8%, Nd23%, Cu1.2%, Ni4%, B2%, Bi2%, Ru0.5%, Tb0.8% according to the following weight percentages, the rest is Fe, and the rest is Fe. The purity of Pr, Nd, Cu, Ni, B, Bi, Ru, Tb and Fe are all greater than 99.9%;

[0037] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1700℃, and let it stand for 3 minutes to obtain the master alloy liquid;

[0038] (3) Cast the master alloy liquid onto the roller under the tap hole of the induction furnace. The master alloy liquid encounters the rotating roller and is dragged by the roller flange to form a cast belt; the rotating linear velocity of the roller flange is 14m / s; the thickness of the cast strip is about 400μm and the width is about 20mm;

[0039] (4) Cool the cast strip naturally for 8 minutes, then put the cast...

Embodiment 3

[0044] The preparation method of the high magnetic energy product NdFeB permanent magnet material of the present invention has the following specific steps:

[0045] (1) Take Pr6%, Nd22%, Cu0.9%, Ni3%, B1.5%, Bi1.5%, Ru0.4%, Tb0.7% according to the above weight percentages, the rest is Fe, the rest is Fe Ingredients; the purity of Pr, Nd, Cu, Ni, B, Bi, Ru, Tb and Fe are all greater than 99.9%;

[0046] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1780℃, and let it stand for 4 minutes to obtain the master alloy liquid;

[0047] (3) Cast the master alloy liquid onto the roller under the tap hole of the induction furnace. The master alloy liquid encounters the rotating roller and is dragged by the roller flange to form a cast belt; the rotating linear velocity of the roller flange is 16m / s; the thickness of the cast strip is about 600μm and the width is about 30mm;

[0048] (4) Cool the cast strip naturally for 10 minutes, and then...

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Abstract

The invention provides a high magnetic energy product neodymium-iron-boron permanent magnet material and a preparation method thereof. The material has relatively high magnetic energy product; the preparation method has simple process, low production cost and is suitable for industrialized production. The weight percentage of each component in the material is: Pr? 5-8%, Nd? 20-23%, Cu? 0.7-1.2%, Ni? 2-4%, B? 1-2%, Bi? 1-2%, Ru? 0.3-0.5%, Tb? 0.5-0.8%, the rest is Fe.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high energy product neodymium-iron-boron permanent magnet material and a preparation method thereof. Background technique [0002] Application No. CN201210012940.3 discloses a manufacturing method of high coercive force R-Fe-B series sintered permanent magnet material, which specifically includes: mixing the raw materials in proportion and casting them into alloy sheets with a thickness of 0.1-0.4mm; After the hydrogen is pulverized, it is dehydrogenated at a temperature of 400-600°C until the hydrogen pressure is <10Pa; in an oxygen-free environment under the protection of an inert gas, the alloy flakes after hydrogen pulverization are sent to an intermediate mill to be pulverized to a particle size of <0.5mm , and then finely pulverized by a jet mill, and classified to make NdFeB alloy powder with a particle size of d=2-4μm; in an oxygen-free environment under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08C22C38/12C22C33/06
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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