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Amorphous alloy powder and preparation method thereof

An amorphous alloy, iron-based amorphous alloy technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve problems such as unfavorable preparation performance magnetic powder core, achieve crystallization transformation and uniform stress release, particle size optimization, The effect of uniform length and width of particles

Active Publication Date: 2016-11-23
张听
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the prior art discloses that the iron-silicon-boron amorphous metal strip is first heat-treated to make it brittle and easily crushed; then the brittle amorphous metal strip is pulverized to obtain amorphous metal powder; but , the preparation method of the prior art has the above-mentioned defects, which is not conducive to the preparation of magnetic powder cores with excellent performance

Method used

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  • Amorphous alloy powder and preparation method thereof
  • Amorphous alloy powder and preparation method thereof
  • Amorphous alloy powder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] This embodiment provides an amorphous alloy powder and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0040] S1. Using a mechanical crusher, the thickness is 18μm, the bandwidth is 10mm, and the composition is Fe 80 Si 9 B 11 The iron-based amorphous alloy thin strips are broken into fragments of 50 mesh to 200 mesh;

[0041] S2. Under a nitrogen protective atmosphere, put the amorphous fragments obtained after the crushing treatment into an atmosphere rotary furnace, and heat-treat at 300°C for 1h. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 5r / min and the atmosphere pressure 0.1MPa, keep turning the atmosphere rotary furnace, so that the amorphous fragments are evenly heated;

[0042] S3. Put the heat-treated amorphous fragments into the airflow grinder, control the output power of the airflow grinder to 35KW, and grind for 50min to realize the optimization of the p...

Embodiment 2

[0050] This embodiment provides an amorphous alloy powder and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0051] S1. Using a mechanical crusher, the thickness is 20μm, the bandwidth is 20mm, and the composition is Fe 78 Si 9 B 13 The iron-based amorphous alloy thin strips are broken into fragments of 50 mesh to 200 mesh;

[0052] S2. Under a nitrogen protective atmosphere, put the amorphous fragments obtained after the crushing treatment into an atmosphere rotary furnace, and heat-treat at 300°C for 1h. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 10r / min and the atmosphere pressure 0.2MPa, keep turning the atmosphere rotary furnace, so that the amorphous fragments are evenly heated;

[0053] S3. Put the heat-treated amorphous fragments into the airflow grinder, control the output power of the airflow grinder to 70KW, and grind for 50min to realize the optimization of the ...

Embodiment 3

[0059] This embodiment provides an amorphous alloy powder and a preparation method thereof, and the corresponding preparation method includes the following steps:

[0060] S1. Using a mechanical crusher, the thickness is 25μm, the bandwidth is 30mm, and the composition is Fe 80 Si 9 B 11 The iron-based amorphous alloy thin strips are broken into fragments of 50 mesh to 200 mesh;

[0061] S2. Under a nitrogen protective atmosphere, put the amorphous fragments obtained after the crushing treatment into an atmosphere rotary furnace, and heat-treat at 280°C for 1h. During the heat treatment, control the rotation rate of the atmosphere rotary furnace to 20r / min and the atmosphere pressure 0.3MPa, keep turning the atmosphere rotary furnace, so that the amorphous fragments are evenly heated;

[0062] S3. Put the heat-treated amorphous fragments into the airflow grinder, control the output power of the airflow grinder to 50KW, and grind for 60min to realize the optimization of the ...

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Abstract

The invention belongs to the field of metal matrix soft magnetic compound materials. The preparation method comprises the following steps: carrying out breaking processing on an amorphous alloy ribbon to obtain fragments; under inert atmosphere, carrying out heat treatment on the fragments, and continuously stirring the fragments in a heat treatment process; and carrying out grinding processing on the fragments subjected to the heat treatment to obtain amorphous alloy powder. The preparation method has the advantages of being high in production efficiency, low in rejection rate and low in production cost and can realize large-scale industrialized application. The prepared amorphous alloy powder has the advantages of smooth edge, no acute angles and even particle length and width, can be largely used in electronic devices which have high-frequency low-loss application requirements, and especially can be largely used for air gap type soft magnetic powder core raw materials.

Description

technical field [0001] The invention belongs to the field of metal-based soft magnetic composite materials, and in particular relates to an amorphous alloy powder with smooth edges and a preparation method thereof. Background technique [0002] Amorphous alloy is a kind of soft magnetic alloy material with excellent performance. It has the advantages of high resistance, high saturation magnetic flux density, high magnetic permeability, low loss and low price. The amorphous alloy thin strip prepared by rapid quenching and quenching process Has been widely used in power frequency transformer core. However, as the operating frequency increases, the eddy current loss of the amorphous alloy thin strip will also increase. Therefore, it has become an urgent need in the field of soft magnetic alloys to develop amorphous alloy magnetic powder cores at medium and high frequencies by referring to powder metallurgy and composite material forming processes. [0003] By powdering the am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153H01F1/20B22F9/04
CPCB22F9/04B22F2009/042H01F1/15308H01F1/1535
Inventor 张听祝万乾坤
Owner 张听
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