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Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof

A technology of magnetic materials and composite addition, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of no improvement in the corrosion resistance of magnetic materials, high use of precious metals, and the inability to reduce weight loss, etc., to achieve less porosity, Improving the crystal structure and increasing the density

Active Publication Date: 2014-08-27
宁波同创强磁材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the usage of its precious metals is still on the high side, for example, the mass percentage of cobalt (Co) is 2%-7%, and the mass percentage of dysprosium (Dy) is 3%-10%, and the cost is still high, and it is only for neodymium The working temperature of iron boron is improved, and the problem of weight loss cannot be reduced, so there is no improvement in the corrosion resistance of magnetic materials

Method used

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  • Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof
  • Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof
  • Low-weight-loss neodymium iron boron magnetic material with Titanium, zirconium and gallium compound addition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Ingredients: Proportion according to the contents stated in the following composition ratio table.

[0032] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 1-1:

[0033] Table 1-1: The distribution ratio of each component (% by weight) in Example 1

[0034] Element

Nd

B

Dy

Al

Zr

Ti

co

Cu

Ga

Fe

Embodiment one

30.1

1.3

0.8

0.6

0.2

0.4

0.5

0.25

0.2

margin

[0035] According to the above proportioning composition, the raw materials are mixed and put into the vacuum belt furnace.

[0036] (1) Smelting: The raw materials that have been cleaned on the surface are prepared according to the alloy composition ratio; placed in a medium-vacuum belt throwing furnace, when the air in the vacuum belt throwing furnace is evacuated to 4-5Pa, heating and smelting is started until When the ingre...

Embodiment 2

[0045] Ingredients: Proportion according to the contents stated in the following composition ratio table.

[0046] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 2-1:

[0047] Table 2-1: The distribution ratio of each component in Example 2

[0048] Element

Nd

B

Dy

Al

Zr

Ti

co

Cu

Ga

Fe

Embodiment two

28.0

1.0

4.0

0.5

0.2

0.2

0.6

0.1

0.2

margin

[0049] According to the above proportioning composition, the raw materials are mixed and put into the vacuum belt furnace.

[0050] (1) Smelting: The raw materials that have been cleaned on the surface are prepared according to the alloy composition ratio; placed in a medium-vacuum belt throwing furnace, when the air in the vacuum belt throwing furnace is evacuated to 4-5Pa, heating and smelting is started until When the ingredients in the f...

Embodiment 3

[0059] Ingredients: Proportion according to the content stated in the following composition ratio table

[0060] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 3-1:

[0061] Table 3-1: The distribution ratio of each component in Example 3

[0062] Element

Nd

B

Dy

Al

Zr

Ti

co

Cu

Ga

Fe

Embodiment Three

25.0

1.5

5.0

0.3

0.3

0.1

0.4

0.2

0.1

margin

[0063] According to the above proportioning composition, each raw material is mixed and charged into a vacuum belt throwing furnace, and other preparation procedures are the same as in Example 2.

[0064] The sintered NdFeB magnet produced according to the above process uses 0.1% titanium, 0.3% zirconium, and 0.1% gallium to replace 2% cobalt and 0.4% dysprosium, reducing the amount of 0.2% gallium to make sintered neodymium iron Boron alloy...

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Abstract

The invention discloses a neodymium iron boron magnetic material with titanium, zirconium and gallium compound addition, which belongs to the technical field of magnetic materials and solves the technical problem that the existing neodymium iron boron magnetic material is high in preparation cost and weight loss. Components of the neodymium iron boron magnetic material with titanium, zirconium and gallium compound addition and mass percent of the components are 25%-30.1% of Nd, 1%-1.5% of B, 0.3%-5% of Dy, 0.5%-0.6% of Al, 0.2% of Zr, 0.2% of Ti, 0.6% -0.8% of Co, 0.2%-0.4% of Cu, 0.2% of Ga and the balance Fe. Simultaneously, the invention further discloses a preparation method for preparing the magnetic material, which includes steps of smelting, powder processing, molding and firing. Cheap metal elements titanium and zirconium are used to replace expensive Dy and Ga, thereby achieving the effect of reducing cost by 10% to 20%, enabling the material to be small in weight loss, and meeting requirements of the existing neodymium iron boron in various application fields.

Description

technical field [0001] The invention relates to a magnetic material and a preparation method thereof, in particular to a high-performance low-weight-loss neodymium-iron-boron magnetic material compounded with titanium, zirconium and gallium, and a preparation method thereof. Background technique [0002] In the process of the transfer of the world's manufacturing and new material industry centers to China, the new material industry as the basis of high-tech industries has attracted much attention. As an important part of the new material industry, rare earth permanent magnet materials, especially NdFeB industry, have also entered It has entered a critical period of development; my country has initially formed its own industrial system in the production of NdFeB. Production has accounted for 40% of the world's total. [0003] Neodymium iron boron (NdFeB) magnetic material is the third generation of permanent magnet material developed in the early 1980s. It has strong magnetic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057B22D11/06B22F3/16
Inventor 赵红良
Owner 宁波同创强磁材料有限公司