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A kind of high remanence NdFeB permanent magnet material and preparation method thereof

A permanent magnet material, NdFeB technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problems of low remanence, unable to ensure the refinement of the material as-cast structure, etc., achieve good performance, and facilitate industrial production. , the effect of reducing the interface defect density

Active Publication Date: 2016-01-20
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The permanent magnet material produced by the above manufacturing method has a remanence of 13.965-12.560kGS, which is relatively low. In addition, the ordinary casting method cannot guarantee the refinement of the as-cast structure of the material

Method used

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  • A kind of high remanence NdFeB permanent magnet material and preparation method thereof
  • A kind of high remanence NdFeB permanent magnet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the high remanence NdFeB permanent magnet material of the present invention comprises the following specific steps:

[0030] (1) According to the following weight percentages, respectively take Nd25%, Te0.5%, Sm3%, Ni0.5%, Cr0.5%, Mn0.5%, Pb0.5%, B2%, Ru0.4%, Ag0 .5%, and the rest are made of Fe; the purity of Nd, Te, Sm, Ni, Cr, Mn, Pb, B, Ru, Ag and Fe are all greater than 99.9%;

[0031] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1510°C, and let stand for 2 minutes to obtain the master alloy liquid;

[0032] (3) Cast the mother alloy liquid on the rotating roller below the tap hole of the induction furnace. The mother alloy liquid encounters the rotating rotating roller and is dragged by the rim of the rotating roller to form a cast belt; the rotational speed of the rotating roller rim is 15m / s; the thickness of the cast strip is about 200μm and the width is about 10mm;

[0033] (4) ...

Embodiment 2

[0038] The preparation method of the high remanence NdFeB permanent magnet material of the present invention comprises the following specific steps:

[0039] (1) According to the following weight percentages, respectively take Nd29%, Te0.9%, Sm6%, Ni1%, Cr1%, Mn1%, Pb1%, B4%, Ru0.6%, Ag0.9%, and the rest are Fe Ingredients; wherein the purity of Nd, Te, Sm, Ni, Cr, Mn, Pb, B, Ru, Ag and Fe are all greater than 99.9%;

[0040] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1520 ℃, and stand for 3 minutes to obtain the master alloy liquid;

[0041] (3) Cast the mother alloy liquid on the rotating roller below the tap hole of the induction furnace. The mother alloy liquid encounters the rotating rotating roller and is dragged by the rim of the rotating roller to form a cast belt; the rotational speed of the rotating roller rim is 16m / s; the thickness of the cast strip is about 400μm and the width is about 20mm;

[0042] (4) C...

Embodiment 3

[0047] The preparation method of the high remanence NdFeB permanent magnet material of the present invention comprises the following specific steps:

[0048] (1) According to the following weight percentages, respectively take Nd27%, Te0.7%, Sm5%, Ni0.7%, Cr0.8%; Mn0.8%, Pb0.7%, B3%, Ru0.5%, Ag0 .8%, and the rest are made of Fe; the purity of Nd, Te, Sm, Ni, Cr, Mn, Pb, B, Ru, Ag and Fe are all greater than 99.9%;

[0049] (2) Put the raw materials into a vacuum induction furnace for smelting, the smelting temperature is 1530°C, and stand for 4 minutes to obtain the master alloy liquid;

[0050](3) Cast the mother alloy liquid on the rotating roller below the tap hole of the induction furnace. The mother alloy liquid encounters the rotating rotating roller and is dragged by the rim of the rotating roller to form a cast belt; the rotational speed of the rotating roller rim is 17m / s; the thickness of the cast strip is about 600μm and the width is about 30mm;

[0051] (4) Cool ...

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Abstract

The invention provides a high-remanence neodymium-iron-boron permanent magnet material and a preparation method thereof. The material has relatively high remanence; the preparation method has simple process, low production cost and is suitable for industrialized production. The weight percentage content of each component of the material is: Nd? 25-29? %, Te? 0.5-0.9%, Sm? 3-6? %, you? 0.5-1? %, Cr? 0.5-1%; Mn? 0.5-1%, Pb? 0.5-1%, B? 2-4%, Ru? 0.4-0.6%, Ag? 0.5-0.9%, the rest is Fe.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high remanence NdFeB permanent magnet material and a preparation method thereof. Background technique [0002] CN201310160603.3 discloses a NdFeB rare earth permanent magnet material and its manufacturing method, mainly including alloy smelting, coarse crushing and powder making, magnetic field forming, sintering, mechanical processing, vacuum heat treatment and other processes; through improving hydrogen crushing and airflow grinding Powder, vacuum heat treatment technology to improve the magnetic properties of permanent magnet devices, thereby reducing the amount of rare earth. [0003] The permanent magnet material produced by the above manufacturing method has a remanence of 13.965-12.560kGS, which is relatively low. In addition, the ordinary casting method cannot guarantee the refinement of the as-cast structure of the material. Contents of the invention [00...

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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