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Method for preparing amorphous metal soft magnetic powder core

An amorphous metal, soft magnetic powder core technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of low inductance value, small quality factor, large density gradient, etc., to achieve effective magnetic permeability improvement, high Effective permeability and quality factor improvement effect

Active Publication Date: 2014-12-10
NINGBO YUNSHENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The powder adopts the traditional compression molding process. Although the higher the pressure at the initial stage of pressing, the higher the density of the amorphous metal magnetic powder core is, and the magnetic permeability increases accordingly. However, when the pressing pressure reaches a certain level, due to the amorphous metal magnetic powder core powder The material has very high hardness, and the density of the amorphous metal magnetic powder core will not increase any more. When the pressing pressure is too high, it will damage the pressing mold to a certain extent, and it will also damage the insulating package of the amorphous metal magnetic powder core. Covering, resulting in the rupture

Method used

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  • Method for preparing amorphous metal soft magnetic powder core
  • Method for preparing amorphous metal soft magnetic powder core
  • Method for preparing amorphous metal soft magnetic powder core

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one: a kind of preparation method of amorphous metal soft magnetic powder core, comprises the following steps:

[0032] ①The amorphous alloy thin strip is heat-treated to make it embrittled; the amorphous alloy thin strip is selected from the Fe-based amorphous alloy thin strip obtained by the single-roll rapid quenching method, and the composition of the Fe-based amorphous alloy thin strip is Fe 78 Si 9 B 13 (at%);

[0033]② The brittle Fe-based amorphous alloy strip is crushed by mechanical milling and jet mill composite crushing method to obtain Fe-based amorphous metal soft magnetic powder. The SEM morphology of Fe-based amorphous metal soft magnetic powder is as follows figure 1 shown;

[0034] ③ Sieving the amorphous metal soft magnetic powder to obtain the first powder passing through -100 to +200 mesh and the second powder passing through -200 to +300 mesh;

[0035] ④ mixing the first powder and the second powder to obtain powder, in the powder, t...

Embodiment 2

[0046] Embodiment two: a kind of preparation method of amorphous metal soft magnetic powder core, comprises the following steps:

[0047] ①The amorphous alloy thin strip is heat-treated to make it embrittled; the amorphous alloy thin strip is selected from the Fe-based amorphous alloy thin strip obtained by the single-roll rapid quenching method, and the composition of the Fe-based amorphous alloy thin strip is Fe 78 Si 9 B 13 (at%);

[0048] ② The brittle Fe-based amorphous alloy strip is crushed by mechanical milling and jet mill composite crushing method to obtain Fe-based amorphous metal soft magnetic powder. The SEM morphology of Fe-based amorphous metal soft magnetic powder is as follows figure 1 shown;

[0049] ③ Sieving the amorphous metal soft magnetic powder to obtain the first powder passing through -100 to +200 mesh and the second powder passing through -200 to +300 mesh;

[0050] ④ mixing the first powder and the second powder to obtain powder, in the powder, ...

Embodiment 3

[0059] Embodiment three: a kind of preparation method of amorphous metal soft magnetic powder core, comprises the following steps:

[0060] ①The amorphous alloy thin strip is heat-treated to make it embrittled; the amorphous alloy thin strip is selected from the Fe-based amorphous alloy thin strip obtained by the single-roll rapid quenching method, and the composition of the Fe-based amorphous alloy thin strip is Fe 78 Si 9 B 13 (at%);

[0061] ② The brittle Fe-based amorphous alloy strip is crushed by mechanical milling and jet mill composite crushing method to obtain Fe-based amorphous metal soft magnetic powder. The SEM morphology of Fe-based amorphous metal soft magnetic powder is as follows figure 1 shown;

[0062] ③ Sieving the amorphous metal soft magnetic powder to obtain the first powder passing through -100 to +200 mesh and the second powder passing through -200 to +300 mesh;

[0063] ④ mixing the first powder and the second powder to obtain powder, in the powder...

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Abstract

The invention discloses a method for preparing an amorphous metal soft magnetic powder core. First powder passing through -100 to 200 meshes and second powder passing through -200 to +300 meshes are obtained by screening amorphous metal soft magnetic powder; the first powder and the second powder are mixed to obtain powder, the weight percentage of the first powder in the powder is 60-90 percent, and the weight percentage of the second powder in the powder is 10-40 percent; after an amorphous metal soft magnetic powder core blank is obtained by pressing the powder, isostatic pressing processing is conducted on the amorphous metal soft magnetic powder core blank, the amorphous metal soft magnetic powder core blank obtained after the isostatic pressing processing is put into a heat treatment furnace, and stress relief annealing processing is conducted in the air or nitrogen or inert gas atmosphere. The method has the advantages that the acting force on the amorphous metal soft magnetic powder core in all directions is large and good in evenness under the isostatic pressing condition, the density of the amorphous metal soft magnetic powder core is greatly improved, the distribution evenness is good, and therefore the amorphous metal soft magnetic powder core has the high effective magnetic conductivity, the high inductance and the high quality coefficient.

Description

technical field [0001] The invention relates to a preparation technology of a magnetic powder core, in particular to a preparation method of an amorphous metal soft magnetic powder core. Background technique [0002] As an important magnetic functional material, magnetic powder core has a very broad application prospect in various inductance devices, power transformers and other fields. Traditional magnetic powder cores mainly include iron powder cores, sendust magnetic powder cores, iron-nickel magnetic powder cores and molybdenum permalloy (MPP) magnetic powder cores. Iron powder cores are cheap, but their high-frequency characteristics are poor; sendust magnetic powder cores have very low core loss and good frequency characteristics, but sendust magnetic powder cores have relatively low DC bias capability under large currents. Poor, the use in a large current field is greatly restricted; the iron-nickel powder core has excellent frequency characteristics in the frequency...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/02B22F3/16H01F1/153H01F1/24
Inventor 张泽强蔡平平戴娟蒋小察余鑫树向明亮
Owner NINGBO YUNSHENG