Preparation method of iron-based soft magnetic material

A soft magnetic material, iron-based technology, applied in the field of preparation of iron-based soft magnetic materials, can solve problems such as poor corrosion resistance, achieve low energy loss, improve resistivity and corrosion resistance, and good soft magnetic properties Effect

Inactive Publication Date: 2014-10-08
深圳市贝塔电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current iron-based soft magnetic materials have poor corrosion resistance and corrosion resistance is of great significance for improving the control accuracy, safety, reliability, and prolonging the service life of electromagnetic components.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The iron-based soft magnetic material of the present embodiment is made of the alloy of the following atomic ratio (Fe 0.73 co 0.15 Cu 0.12 ) 0.83 (Si 0.79 Cr 0.21 ) 0.12 Yb 0.02 B 0.03 .

[0021] Raw materials are prepared according to the above-mentioned atomic proportions, wherein the purity of all metal raw materials is greater than 99.9%, silicon is compounded in the form of silicon-chromium alloy, ytterbium is formulated in the form of ytterbium-iron master alloy, and boron is added in the form of borax; mix the raw materials, place Melting in a magnetic levitation melting furnace, the melting is carried out under vacuum, the melting temperature is 1550°C, the melting is repeated 5 times, each time the magnetic stirring is 3 minutes, and after the melting is completed, it is poured into a water-cooled copper mold to obtain an alloy ingot.

[0022] The slag ratio of electroslag remelting is: KF: CaO: Al 2 o 3 =70:10:20 (weight ratio), heat the slag in the...

Embodiment 2

[0026] The iron-based soft magnetic material of the present embodiment is made of the alloy of the following atomic ratio (Fe 0.66 co 0.18 Cu 0.16 ) 0.78 (Si 0.75 Cr 0.25 ) 0.15 Yb 0.03 B 0.04 .

[0027] Raw materials are prepared according to the above-mentioned atomic proportions, wherein the purity of all metal raw materials is greater than 99.9%, silicon is compounded in the form of silicon-chromium alloy, ytterbium is formulated in the form of ytterbium-iron master alloy, and boron is added in the form of borax; mix the raw materials, place Melting in a magnetic levitation melting furnace, the melting is carried out under vacuum, the melting temperature is 1600°C, the melting is repeated 3 times, and the magnetic force is stirred for 1 minute each time. After the melting is completed, it is poured into a water-cooled copper mold to obtain an alloy ingot.

[0028] The slag ratio of electroslag remelting is: KF: CaO: Al 2 o 3 =80:5:15 (weight ratio), heat the slag...

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Abstract

The invention relates to a preparation method of an iron-based soft magnetic material. The soft magnetic material is prepared by using an alloy with the chemical formula of (Fe[1-x-y]Co[x]Cu[y])[1-a-b-c](Si[1-z]Cr[z])[a]Yb[b]B[c], wherein x is 0.15-0.18, y is 0.12-0.16, z is 0.21-0.25, a is 0.12-0.15, b is 0.02-0.03, and c is 0.03-0.04. The method comprises the steps of burdening, melting ingot production, electroslag remelting, alloy strip preparation and heat treatment. The soft magnetic material prepared in the invention adopts Co and Cu to substitute parts of Ni in order to improve the soft magnetic performance of the material, the doping of Yb improves the magnetic saturation intensity of the material, the doping of Si, B and Cr improves the resistivity and the corrosion resistance of the material, and the adoption of an electroslag remelting technology enhances the stability of the material. The material has a good soft magnetic performance and low energy loss when the material is used in humid environment and other severe environments for a long term.

Description

Technical field [0001] The invention relates to a preparation method of an iron-based soft magnetic material. Background technique [0002] With the development of electronic, electrical and information communication technologies, soft magnetic materials are used more and more widely, especially in various transformers, inductance components, filter devices and other application fields. The use of nanocrystalline alloys as a necessary material for soft magnetic materials has long been widely used. [0003] The excellent soft magnetic properties of iron-based nanocrystalline soft magnetic alloys are attributed to the special two-phase composite structure of the amorphous matrix and the uniform distribution of nanograins on the matrix. The magnetocrystalline anisotropy of the alloy is greatly reduced. Compared with the spin-quenched amorphous strip, after annealing, the soft magnetic properties of the partially crystallized iron-based amorphous / nanocrystalline strip have a gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C33/04B22D11/11C21D1/26H01F1/147
Inventor 王杨
Owner 深圳市贝塔电子股份有限公司
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