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Preparation method of Fe-based amorphous alloy magnetic core and Fe-based amorphous alloy

A technology of iron-based amorphous alloys and magnetic cores, which is applied in the field of preparation of iron-based amorphous alloys and iron-based amorphous alloy magnetic cores, and can solve the problems of long annealing time, high crystallization annealing temperature, and difficult application of magnetic cores

Active Publication Date: 2018-12-18
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is simple, and magnetic cores of different sizes can be obtained by adjusting the temperature and time of heat treatment; but its constant magnetic permeability range is small, and the magnetic core is difficult to apply under high current conditions; on the other hand, the traditional surface The crystallization annealing temperature is higher and the annealing time is longer
[0012] According to the above description, it can be seen that the above four methods for obtaining excellent permanent magnetic properties of iron-based amorphous alloys still have various defects.

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  • Preparation method of Fe-based amorphous alloy magnetic core and Fe-based amorphous alloy
  • Preparation method of Fe-based amorphous alloy magnetic core and Fe-based amorphous alloy

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[0034] Aiming at the problem of constant magnetic permeability of iron-based amorphous alloys prepared in the prior art, this application provides a method for preparing iron-based amorphous alloy magnetic cores, which improves the saturation magnetic induction of the iron-based amorphous alloys. It has better constant magnetic permeability performance in a wider magnetic field. Specifically, the embodiment of the present invention discloses a method for preparing an iron-based amorphous alloy magnetic core, which includes the following steps:

[0035] A) Batching according to the composition of the iron-based amorphous alloy as shown in formula (I), smelting the batched raw materials into molten steel; adjusting the temperature of the molten steel to 150-300°C above the alloy liquidus temperature, The liquid level height of the molten steel is 600-850mm;

[0036] B) Set the copper roller linear speed to 20-30m / s, the distance between the nozzle and the copper roller 200-300μm, an...

Embodiment 1

[0059] (1) According to the composition formula Fe 100-a-b-c-d Ni a Si b B c Cu d Make ingredients, where a, b, c, and d respectively represent the atomic percentage of the corresponding component: 0.5≤a≤3, 3≤b≤8, 10≤c≤15, 0.3≤d≤2;

[0060] (2) According to the ingredients in the above step (1), the raw materials are smelted into molten steel;

[0061] (3) Adjust the temperature of the molten steel to 150~400℃ above the alloy liquidus temperature, the height of the molten steel is 350mm; set the copper roller linear speed to 25m / s, and the distance between the nozzle and the copper roller to be 300μm. The iron-based amorphous alloy ribbon is prepared by the roller rapid quenching method;

[0062] (4) The iron-based amorphous alloy thin strip obtained in step (3) is wound into a ring-shaped closed magnetic core with an outer diameter of 25mm and an inner diameter of 19.5mm;

[0063] (5) The iron-based amorphous magnetic core prepared in step (4) is subjected to ordinary heat treatment...

Embodiment 2

[0069] Using different process conditions to prepare Fe 80.5 Ni 1 Si 6 B 12 Cu 0.5 For amorphous ribbons, the specific steps are as follows:

[0070] (1) Select the component Fe 80.5 Ni 1 Si 6 B 12 Cu 0.5 Make ingredients

[0071] (2) According to the ingredients in the above step (1), the raw materials are smelted into molten steel;

[0072] (3) Adjust the temperature of the molten steel to 1350℃, the height of the molten steel level is 650mm; set the copper roller linear speed to 10~35m / s (specifically 10m / s, 20m / s and 35m / s), the nozzle and copper The distance between the rollers is 100-300μm (specifically 100μm, 200μm and 300μm), the iron-based amorphous alloy ribbon is prepared by a single-roll rapid quenching method, the width of the ribbon is 30mm, and the thickness is 23-31μm;

[0073] (4) The iron-based amorphous alloy thin strip obtained in step (3) is wound into a toroidal closed magnetic core, the outer diameter of the core is 32mm, the inner diameter is 25mm, and the heig...

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Abstract

The invention provides a preparation method of a Fe-based amorphous alloy magnetic core. The preparation method of the Fe-based amorphous alloy magnetic core comprises the following steps of A) preparing materials according to components of a Fe-based amorphous alloy shown in a formula (I), and smelting the prepared raw materials into molten steel; B) cooling the molten steel by using a single-roller rapid quenching method to obtain a Fe-based amorphous alloy thin strip; C) winding the Fe-based amorphous alloy thin strip into a ring so as to obtain a Fe-based amorphous alloy thin strip closedmagnetic core; and D) carrying out heat treatment on the Fe-based amorphous alloy thin strip closed magnetic core so as to obtain the Fe-based amorphous alloy thin strip magnetic core. According to the preparation method of the Fe-based amorphous alloy magnetic core, on the basis of using a surface crystallization method to prepare a permanent permeability Fe-based amorphous alloy, the Bs of the Fe-based amorphous alloy is increased by adjusting alloy components and preparation process parameters so that the Bs of the Fe-based amorphous alloy is increased, and the permanent permeability performance within a wider magnetic field range is realized.

Description

Technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a method for preparing an iron-based amorphous alloy magnetic core and an iron-based amorphous alloy. Background technique [0002] Many components in the electronics industry require magnetic core materials with constant magnetic permeability, such as acoustic noise suppressors, filter inductors for household appliances, and current transformers. The constant permeability of magnetic materials means that the permeability of the material remains constant in a wide range of magnetic fields. The iron-based amorphous alloy has the characteristics of low high-frequency loss, high permeability and saturation magnetic induction, and low material cost. The constant magnetic permeability iron core made has replaced traditional materials in many fields. [0003] At present, the methods for obtaining excellent constant magnetic permeability of amorphous alloys mainly include open air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02H01F1/047
CPCC22C33/003C22C45/02H01F1/047
Inventor 张世明杨东张立飞林福强
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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