A kind of NdFeB magnetic material compounded with lanthanide elements and its preparation method

A magnetic material and compound additive technology, which is applied in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve problems such as high production costs, waste of rare earth resources, and poor corrosion resistance, and achieve process improvement and reduction The distribution of grain boundary rich phase structure and the effect of cost reduction

Active Publication Date: 2017-06-13
宁波同创强磁材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, there are 17 kinds of rare earth elements. At present, only six elements of praseodymium, neodymium, dysprosium, terbium, gadolinium, and holmium are widely used in sintered NdFeB. Other rare earth elements, especially lanthanum, Cerium is rarely or basically not used, resulting in a large waste of rare earth resources
[0004] Due to the sharp rise in the price of rare earth elements in recent years, this has led to high production costs of high-performance NdFeB magnetic materials, and the existing high-performance NdFeB permanent magnet materials have poor corrosion resistance and high weight loss, resulting in sintered NdFeB magnetic materials. The iron and boron industry has entered a stage of stagnation after rapid development from 2000 to 2011

Method used

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  • A kind of NdFeB magnetic material compounded with lanthanide elements and its preparation method
  • A kind of NdFeB magnetic material compounded with lanthanide elements and its preparation method
  • A kind of NdFeB magnetic material compounded with lanthanide elements and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Ingredients: Proportion according to the contents stated in the following composition ratio table.

[0033] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 1-1:

[0034] Table 1-1: Each component distribution ratio (mass percentage %) in embodiment 1

[0035] Element Nd B La co Cu Ti Al Nb Ga Fe Embodiment one 21 1.05 10 0.5 0.20 0.4 0.6 0.3 0.2 margin

[0036] According to the above proportioning composition, the raw materials are mixed and put into the vacuum belt furnace.

[0037] (1) Melting: The raw materials that have been cleaned on the surface are prepared according to the alloy composition ratio; placed in a vacuum belt furnace, when the air in the vacuum belt furnace is evacuated to 4-5Pa, heating and melting begins, until the furnace When the inner ingredients turn red, close the vacuum valve, fill in argon to 0.4MPa, and raise the temperature t...

Embodiment 2

[0046] Ingredients: Proportion according to the contents stated in the following composition ratio table.

[0047] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 2-l:

[0048] Table 2-1: Each component distribution ratio (mass percentage %) in embodiment 2

[0049] Element PrN B La Ce co Cu Ti Al Nb Ga Fe Example 2 28.5 1.05 1 1 1.0 0.12 0.1 0.2 0.2 0.1 margin

[0050] According to the above proportioning composition, the raw materials are mixed and put into the vacuum belt furnace.

[0051] (1) Melting: The raw materials that have been cleaned on the surface are prepared according to the alloy composition ratio; placed in a vacuum belt furnace, when the air in the vacuum belt furnace is evacuated to 4-5Pa, heating and melting begins, until the furnace When the inner ingredients turn red, close the vacuum valve, fill in argon to 0.5MPa, and raise the temperat...

Embodiment 3

[0060] Ingredients: Proportion according to the content stated in the following composition ratio table

[0061] Taking the smelting of 600Kg NdFeB alloy as an example, the distribution ratio of each component is shown in Table 3-l:

[0062] Table 3-1: Each component distribution ratio (mass percentage %) in embodiment 3

[0063]

[0064] According to the above proportioning composition, the raw materials are mixed and put into the vacuum belt furnace.

[0065] (1) Melting: The raw materials that have been cleaned on the surface are prepared according to the alloy composition ratio; placed in a vacuum belt furnace, when the air in the vacuum belt furnace is evacuated to 5-8Pa, heating and smelting is started, until the furnace When the inner ingredients turn red, close the vacuum valve, fill in argon to 0.5MPa, and raise the temperature to 1480°C until the ingredients are completely melted, then refine for 10-15 minutes, and adjust the power to 80KW for pouring after the s...

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Abstract

The invention relates to a lanthanide-compounded NdFeB magnetic material, and belongs to the technical field of rare earth magnetic materials. The NdFeB magnetic material comprises the following components by mass percent: 0.1-32% of Nd or PrNd, 0.9-1.5% of B, 0-10% of Dy, 0.5-10% of Co, 0.05-0.25% of Cu, 0.1-15% of lanthanide, 0.1-4.5% of trace element M and the balance of Fe. The invention further discloses a preparation method of the NdFeB magnetic material. The preparation method comprises the following steps: smelting, pulverizing, moulding and sintering. Through compound addition of the lanthanide and the trace element M, 10-20% of the cost is reduced on the premise that the performance of the NdFeB magnetic material is not lowered; the weight loss of the material is less than 0.5mg / cm2; by the preparation method, the lanthanide-compounded NdFeB magnetic material with relatively high performance is prepared.

Description

technical field [0001] The invention relates to a neodymium-iron-boron magnetic material compounded with lanthanide elements and a preparation method thereof, belonging to the technical field of rare earth magnetic materials. Background technique [0002] Sintered NdFeB magnetic materials, as an important part of the new material industry, are widely used in international and domestic emerging industries and pillar industries, such as computer industry, information industry, communication industry, automobile industry, nuclear magnetic resonance imaging industry, office automation etc. A large industrial scale has been formed in our country, and the output has accounted for 85% of the world's total. [0003] However, with the continuous expansion of the production scale of NdFeB magnetic materials, the consumption of rare earth resources in China has become increasingly serious. By the end of 2005, the total amount of proven rare earth resources in my country was 87.31 mill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02B22F3/16
Inventor 赵红良范逢春张子祥
Owner 宁波同创强磁材料有限公司
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