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Low neodymium content magnetic particle and preparation process thereof

A preparation process and technology of magnetic powder, applied in the field of low neodymium magnetic powder and its preparation process, can solve the problem of high content of neodymium in the bonded permanent magnetic powder, and achieve the effects of improving the remanence of the magnetic powder, reducing the cost and reducing the content of neodymium

Inactive Publication Date: 2015-04-29
MIANYANG XINYA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a low neodymium magnetic powder with low product cost and saving rare earth resources for the above-mentioned problem of high content of neodymium in the existing bonded permanent magnet magnetic powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The low neodymium magnetic powder 1000g listed in this embodiment has the following formula, mass and mass percentage:

[0034] Neodymium 120g (12%);

[0035] Iron 750g (75%);

[0036] Aluminum 30g (3%);

[0037] Boron 40g (4%);

[0038] Zirconium 60g (6%).

[0039] Preparation Process:

[0040] 1. Weigh 120 g of neodymium, 750 g of iron, 30 g of aluminum, 40 g of boron, and 60 g of zirconium, respectively, mix them, place them in a vacuum induction furnace, and smelt them into alloy ingots in an argon atmosphere;

[0041] 2. The alloy ingot is crushed to a particle size of less than 10mm, placed in a vacuum rapid quenching furnace, and the alloy ingot is melted by an electric arc, and then a molybdenum wheel is used as a cooling medium to make the alloy solution at a speed of hundreds of thousands to millions of degrees per second. Cool to make amorphous or microcrystalline ribbons with a thickness of about 30 μm;

[0042] 3. The amorphous or microcrystalline thi...

Embodiment 2

[0044] The low neodymium magnetic powder 2000g listed in this embodiment has the following formula, mass and mass percentage:

[0045] Neodymium 200g (10%);

[0046] Iron 1600g (80%);

[0047] Aluminum 40g (2%);

[0048] Boron 60g (3%);

[0049] Zirconium 100g (5%).

[0050] Preparation Process:

[0051] 1. Weigh 200 g of neodymium, 1600 g of iron, 40 g of aluminum, 60 g of boron, and 100 g of zirconium, respectively, mix them, place them in a vacuum induction furnace, and smelt them into alloy ingots in an argon atmosphere;

[0052] 2. The alloy ingot is crushed to a particle size of less than 10mm, placed in a vacuum rapid quenching furnace, and the alloy ingot is melted by an electric arc, and then a molybdenum wheel is used as a cooling medium to make the alloy solution at a speed of hundreds of thousands to millions of degrees per second. Cool to make amorphous or microcrystalline ribbons with a thickness of about 30 μm;

[0053] 3. The amorphous or microcrystalline...

Embodiment 3

[0055] The low neodymium magnetic powder 500g listed in this embodiment has the following formula, mass and mass percentage:

[0056] Neodymium 75g (15%);

[0057] Iron 350g (70%);

[0058] Aluminum 20g (4%);

[0059] Boron 25g (5%);

[0060] Zirconium 30g (6%).

[0061] Preparation Process:

[0062] 1. Weigh 75g of neodymium, 350g of iron, 20g of aluminum, 25g of boron, and 30g of zirconium, respectively, mix them, place them in a vacuum induction furnace, and smelt them into alloy ingots under an argon atmosphere;

[0063] 2. The alloy ingot is crushed to a particle size of less than 10mm, placed in a vacuum rapid quenching furnace, and the alloy ingot is melted by an electric arc, and then a molybdenum wheel is used as a cooling medium to make the alloy solution at a speed of hundreds of thousands to millions of degrees per second. Cool to make amorphous or microcrystalline ribbons with a thickness of about 30 μm;

[0064] 3. The amorphous or microcrystalline thin rib...

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Abstract

The invention relates to the field of magnetic material, in particular to a low neodymium content magnetic particle and a preparation process thereof. The raw materials of low neodymium content magnetic particle include, by weight percentage: 10% to 15% of neodymium, 70% to 80% of iron, 1% to 5% of aluminum, 1% to 5% of boron, and 3% to 10% of zirconium. The preparation process includes weighing the neodymium, iron, aluminum, boron and zirconium properly, arranging in a vacuum induction furnace, and smelting to obtain alloy ingots; crushing the alloy ingots into particles with the particle degree smaller than 10mm, arranging in a vacuum quenching furnace, cooling the liquid alloy in the speed of hundred thousand to million degree centigrade per second, and obtaining amorphous or microcrystalline thin strips with the thickness of 30 micrometers; pressing the amorphous or microcrystalline thin strips to obtain particles with the particle degree of 150 micrometers, performing crystallization treatment in a vacuum crystallization furnace at the temperature of 70 DEG C, crushing the magnetic powder into powder material with the mesh ranging from 100 to 200, and obtaining the low neodymium content magnetic particle after detection qualification.

Description

technical field [0001] The invention relates to the field of magnetic materials, and specifically discloses a low neodymium magnetic powder and a preparation process thereof. Background technique [0002] Bonded rare earth permanent magnet materials have become an important material basis for contemporary new technologies, and have been used in microwave communication technology, audio and video technology, television engineering, instrument technology, computing technology, automation technology, automobile industry, communication industry, transportation industry, petrochemical industry, Bioengineering and magnetic medical and fitness equipment and other fields have been widely used. Therefore, as a new basic functional material, the rapid development of bonded rare earth permanent magnets will surely play a catalytic and boosting role for the development of the above-mentioned fields. [0003] However, the existing bonded permanent magnetic powder is usually produced by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057B22F9/04B22F1/00B22D11/06C22C38/14
Inventor 岑国长谢桥
Owner MIANYANG XINYA TECH
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