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A kind of preparation technology of alloy soft magnetic powder core

A technology of soft magnetic powder core and preparation process, which is applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems of magnetic permeability reduction, achieve high density, stable high-frequency characteristics, and minimize eddy current The effect of loss

Active Publication Date: 2015-09-30
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at higher frequencies, conventional techniques have serious problems with reduced permeability

Method used

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  • A kind of preparation technology of alloy soft magnetic powder core
  • A kind of preparation technology of alloy soft magnetic powder core
  • A kind of preparation technology of alloy soft magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation process of the alloy soft magnetic powder core of the present embodiment comprises the following steps:

[0029] The iron-based nanocrystalline metal strip produced by the single-roller extremely cold method is mainly crushed in two steps of coarse crushing and fine crushing by a pulverizer to obtain nanocrystalline metal powder;

[0030] The nanocrystalline metal powder is sieved and proportioned, thereby dividing the powder into a powder that can pass through -200~+270 mesh and a powder that can pass through -270~+325 mesh, and then mixing them into powder particles. The proportion distribution of the powder particles is composed of 80% by weight of powder passing through -200~+270 mesh and 20% by weight of powder passing through -270~+325 mesh.

[0031] The mixed nanocrystalline metal powder is subjected to passivation and insulation bonding coating treatment, passivation treatment: Pour the nanocrystalline metal powder with a good ratio into the ...

Embodiment 2

[0035] The difference between this example and Example 1 is that in the nanocrystalline metal powder particles mixed by sieving and proportioning, the weight content of the powder passing through -200~+270 mesh is 50%, and the powder passing through -270~+325 mesh The weight content is 50%.

[0036] Observe the surface composition of the prepared magnetic powder core, measure the magnetic properties of the prepared magnetic powder core, and record the magnetic permeability in Table 1.

Embodiment 3

[0038] The difference between this example and Example 1 is that in the nanocrystalline metal powder particles mixed by sieving and proportioning, the weight content of the powder passing through -200~+270 mesh is 65%, and the powder passing through -270~+325 mesh The weight content is 35%.

[0039] Observe the surface composition of the prepared magnetic powder core, measure the magnetic properties of the prepared magnetic powder core, and record the magnetic permeability in Table 1.

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Abstract

The invention relates to a preparation technology of alloy soft magnetic powder cores, in particular to the preparation technology of Fe-based nanocrystalline magnetic powder cores which have good high-frequency characteristics. The preparation technology includes the following steps: mechanically crushing Fe-based nanocrystalline metal ribbons to obtain nanocrystalline metal powder, screening and proportioning the nanocrystalline metal powder and then mixing the nanocrystalline metal powder into powder grains which are composed of first powder and second powder, wherein the first powder by weight, occupies 50%-80% of the powder grains, and passes through -200-270 meshes. The second powder, by weight, occupies 20%-50% of the powder grains, and passes through -270-325 meshes. The mixed nanocrystalline metal powder is subjected to passivation process and insulation bonding cladding process, and then is press-molded into magnetic cores. The molded magnetic cores are subjected to annealing process, and then coating insulation process is carried out on the surfaces of the magnetic cores.

Description

technical field [0001] The invention relates to a manufacturing process of an alloy soft magnetic powder core, in particular to a manufacturing process of an iron-based nanocrystalline magnetic powder core with excellent high-frequency characteristics. Background technique [0002] The magnetic powder core is a kind of composite soft magnetic material prepared by powder metallurgy method after the soft magnetic powder is insulated and protected. It is widely used in the production of various electronic components such as communication, energy, automobile industry, home appliances, automatic door control and inductors, filters, transformers, inverters, etc. [0003] Amorphous and nanocrystalline soft magnetic materials are recently developed green and environmentally friendly materials. They are substitutes for traditional soft magnetic materials including silicon steel, ferrite and permalloy. They have made remarkable achievements in both theoretical and applied research fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/24B22F1/02B22F3/16
Inventor 李晓雨王亚娜纪杰江志滨
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD