Method for preparing composite bonded permanent magnet

A technology for bonding permanent magnets and permanent magnet powders. It is applied in the fields of magnetic objects, inductors/transformers/magnets, and magnetic materials. , improve the overall cost-effective effect

Inactive Publication Date: 2013-09-11
嘉兴集禾电子商务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Anisotropic NdFeB magnetic powder is a high-performance magnetic powder that has just appeared in recent years. However, due to insufficient market awareness, only a few companies are currently producing in small batches and have not yet fully industrialized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The samarium-cobalt-based permanent magnet powder of the present embodiment has the following chemical formula: Sm 2 (Co 1-a-b-c Cu 0.18 Fe 0.15 Y 0.03 ) 8.5 , mix Co, Cu, Fe and Y according to the proportion of the chemical formula, place it in the heating crucible of the electric arc furnace, and evacuate to 10 -4 Pa or above, then introduce high-purity helium gas at 0.2 atmospheric pressure, and heat it with electricity. After all the materials in the crucible are melted, add Sm and metal calcium with a mass fraction of 0.1% of the total weight of the alloy raw materials into the crucible according to the above chemical formula ratio. , repeated smelting 3 times to obtain a uniform alloy liquid, and then poured into a water-cooled copper mold to obtain an alloy ingot. The above alloy ingot was first mechanically crushed into particles of 2-5mm in size, and then ball-milled to a particle size of 1-3μm powder.

[0021] The anisotropic NdFeB magnetic powder and th...

Embodiment 2

[0024] The samarium-cobalt-based permanent magnet powder of the present embodiment has the following chemical formula: Sm 2 (Co0. 57 Cu 0.2 Fe 0.18 Y 0.05 ) 8.5 , mix Co, Cu, Fe and Y according to the proportion of the chemical formula, place it in the heating crucible of the electric arc furnace, and evacuate to 10 -4 Pa or above, then introduce high-purity helium gas at 0.3 atmospheric pressure, and heat it with electricity. After all the materials in the crucible are melted, add Sm and metal calcium with a mass fraction of 0.3% of the total weight of the alloy raw materials into the crucible according to the above chemical formula ratio. , repeated smelting 5 times to obtain a uniform alloy liquid, and then poured into a water-cooled copper mold to obtain an alloy ingot. The above alloy ingot was first mechanically crushed into particles with a size of 2-5mm, and then ball-milled to a particle size of 1-3μm. powder.

[0025] Mix the anisotropic NdFeB magnetic powder a...

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Abstract

The invention relates to a method for preparing a composite bonded permanent magnet. The method includes the following steps that (1), samarium-cobalt-based permanent powder is prepared; (2), the permanent powder is mixed and granulation is performed; (3), injection molding is performed. According to the prepared composite bonded permanent magnet, samarium cobalt magnet material and neodymium iron boron material are composite, wherein the samarium cobalt magnet material and the neodymium iron boron material have good high-temperature performance, and the high-temperature magnetic performance of the permanent magnet is improved. Meanwhile, the usage amount of rare earth of the material is reduced, and the overall cost performance of the magnet is improved.

Description

Technical field [0001] The invention relates to a preparation method of a composite bonded permanent magnet. Background technique [0002] Permanent magnet materials are an important branch of electronic materials, and their performance directly reflects the development level of electronic materials in a country. With the wide application of high-performance permanent magnet materials in industries such as computers, automobiles, aerospace, office equipment, home appliances and medical treatment, their market demand is increasing year by year. [0003] As a new type of composite functional material, bonded rare earth permanent magnet is widely used in information technology, automobile industry, computer and other fields. Compared with sintered magnets, bonded rare earth permanent magnets have the advantages of low process cost, high dimensional accuracy, easy molding of complex shape devices, and easy realization of large-scale automated production. And performance resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/053H01F1/08
Inventor 李超
Owner 嘉兴集禾电子商务有限公司
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