Cohesive rare earth magnetic powder and preparation equipment thereof

A technology of rare earth magnetic powder and equipment, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of increasing the cost of quick-quenching bonded NdFeB magnetic powder, failing to meet high magnetic energy product, and rusting of magnets, etc., to achieve enhanced Ferromagnetic exchange, low coercive force, solve the effect of easy rust

Inactive Publication Date: 2014-05-07
江西江钨稀有金属新材料股份有限公司
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  • Description
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Problems solved by technology

The formula of CN101241789A added a very high amount of rare earth and added nearly 5% of the Zr element, which not only increased the cost of the quick-quenching bonded NdFeB magnetic powder, but also caused the magnet to rust more easily due to the addition of too much Zr element, and This patent cannot meet the magnetic properties of high energy product and low coercive force

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  • Cohesive rare earth magnetic powder and preparation equipment thereof
  • Cohesive rare earth magnetic powder and preparation equipment thereof
  • Cohesive rare earth magnetic powder and preparation equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Proportioning each component according to the above composition formula, the rare earth Nd with a purity of 99.9%, the weight percentage is 24%, the Fe-B alloy (wherein the B content is 19%), the B weight percentage is 2.1%, and the Co weight percentage is 2.0 %, the rest is Fe content. Mix the ingredients evenly, put them into a vacuum melting furnace for smelting under the protection of inert gas argon, and obtain 30 kg of alloy ingots with uniform components after smelting, and perform rapid quenching treatment, 4x10 4 Under the argon pressure of Pa and the rapid quenching speed of 30m / s, the temperature of the rapid quenching furnace is controlled at 1400°C. After obtaining the thin metal strip, it is crushed through a 40-mesh sieve, and crystallized at 700°C for 10 minutes. The prepared sample The magnetic properties were measured by a vibrating sample magnetometer (VSM), and the properties are shown in Table 1.

Embodiment 2

[0047] According to the following formula, the purity is 99.9% Nd, the weight percentage is 24%, the Fe-B alloy (wherein the B content is 19%), the B weight percentage is 2.1%, the Co weight percentage is 2.0%, and the rest is Fe content . Repeat the preparation process for sample 1, 4x10 4 Under the argon pressure of Pa and the rapid quenching speed of 30m / s, the rapid quenching temperature was controlled at 1100°C, crystallized at 700°C for 10 minutes, and the magnetic properties of the prepared samples were measured with a vibrating sample magnetometer (VSM). The performance is shown in Table 1.

[0048] It can be seen from the above examples that the bonded NdFeB magnetic powder obtained under the parameters of Example 1 has high magnetic energy product and low coercive force. Compared with Example 2, when other parameters are the same, changing the quenching temperature directly affects the properties of the magnetic powder. The comparison shows that controlling the que...

Embodiment 3

[0050] According to the following formula, the purity is 99.9% Nd, the weight percentage is 18.6%, the Fe-B alloy (wherein the B content is 19%), the B weight percentage is 2.1%, the Co weight percentage is 2.0%, and the rest is Fe content . Repeat the preparation process for sample 1, 4x10 4 Under the argon pressure of Pa and the rapid quenching speed of 30m / s, the rapid quenching temperature is controlled at 1400°C, and crystallized at a temperature of 700°C for 10 minutes. The prepared sample is measured by a vibrating sample magnetometer (VSM). The magnetic properties are shown in Table 1.

[0051] Comparing Examples 1 and 3, it can be seen that under the same conditions of other parameters, when the weight percentage of rare earth Nd drops from 24% to 18.6%, the main magnetic properties of the magnetic powder also decline significantly. It can be known that the content of rare earth Nd is a major factor affecting the performance of magnetic powder. One of the factors, a...

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Abstract

The invention discloses cohesive rare earth magnetic powder. According to the percentage by weight, the basic representation is RExFe100-x-y-zByMz, wherein RE is neodymium element, Fe is iron element, B is boron element, M is cobalt element, x is 13-25.8, y is 0.1-2.1, and z is 0.1-4. The cohesive NdFeB permanent magnet material with high magnetic energy product and low intrinsic coercive force is prepared.

Description

technical field [0001] The present invention relates to a high-performance rare earth permanent magnet material and its preparation equipment, and more to a bonded NdFeB rare earth permanent magnet material and its preparation equipment, especially a high magnetic energy product and low intrinsic coercivity Strongly bonded magnetic powder of NdFeB rare earth permanent magnet material and its preparation equipment. Background technique [0002] NdFeB permanent magnet material is currently the most magnetic permanent magnet, with excellent characteristics such as high magnetic energy product and high cost performance. NdFeB has the characteristics of small size, light weight and strong magnetism. It is the best performance-price ratio magnet so far. NdFeB is widely used in fields such as information technology, automobiles, nuclear magnetic resonance, wind power generation and motors because of its energy-saving and environmental protection characteristics. Improving the per...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/08B22F9/06C22C38/10C22C33/02
Inventor 陈鑫杨安
Owner 江西江钨稀有金属新材料股份有限公司
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