Preparation method of iron-based soft magnet with anticorrosive coating layer

A technology of anti-corrosion coating and soft magnets, applied in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of coating failure, low saturation magnetic induction intensity, limited application scope, etc., to avoid coating bulging , Improve the effect of anti-corrosion performance

Inactive Publication Date: 2018-03-13
SUZHOU NANER MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still obvious disadvantages in amorphous alloys: the saturation magnetic induction is not high. Compared with other soft magnetic materials with high saturation magnetic induction, the alloy material needs a larger volume under the same working conditions, which greatly limits its scope of application
There will be hydrogen evolution effect during the pretreatment and electroplating process, and the generated hydrogen will infiltrate and adsorb in the micropores on the surface of the substrate. When the concentration is high, the adsorbed hydrogen will overflow due to expansion, which will generate a pressure on the coating, causing the coating to protrude from the substrate, forming bulging and foaming, resulting in failure of the coating and seriously affecting the anti-corrosion ability of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The main body of the iron-based soft magnetic soft magnetic body of the present embodiment is made of the alloy with the following atomic ratio: Fe 68.94 C 0.05 Si 0.5 Cu 9.5 P 0.01 Cr 3 al 12 Ni 6 .

[0025] Weigh each element according to the above atomic ratio for batching; Put the batching ingredients into the boron nitride crucible, try to put the alloy steel or alloy elements with high density and low melting point on it, and then put it into the vacuum induction melting cavity In the induction coil, a mechanical pump and a diffusion pump are used to evacuate, and when the vacuum degree reaches 2.0×10-3 Pa, it is filled with 0.04MPa argon gas with a purity of 99.999% as a protective gas. Then start to smelt the master alloy, turn off the power after one smelting, and continue heating and smelting after complete cooling, the process continues four times, and finally prepares the master alloy ingot.

[0026] The master alloy ingot was broken into small sampl...

Embodiment 2

[0032] The main body of the iron-based soft magnetic soft magnetic body of the present embodiment is made of the alloy with the following atomic ratio: Fe 62.37 C 0.1 Si 1 Cu 10 P 0.03 Cr 3.5 al 15 Ni 8 .

[0033] Weigh each element according to the above atomic ratio for batching; Put the batching ingredients into the boron nitride crucible, try to put the alloy steel or alloy elements with high density and low melting point on it, and then put it into the vacuum induction melting cavity In the induction coil, a mechanical pump and a diffusion pump are used to evacuate, and when the vacuum degree reaches 2.0×10-3 Pa, it is filled with 0.04MPa argon gas with a purity of 99.999% as a protective gas. Then start to smelt the master alloy, turn off the power after one smelting, and continue heating and smelting after complete cooling, the process continues four times, and finally prepares the master alloy ingot.

[0034]The master alloy ingot was broken into small samples,...

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Abstract

The invention discloses a preparation method of an iron-based soft magnet with an anticorrosive coating layer. Multiple elements of Ni, Cr, Cu, Al, P and C which can improve the comprehensive performance of Fe-based amorphous soft magnet alloy are adopted to prepare and obtain an iron-based soft magnet substrate; and the surface of the soft magnet alloy is electroplated with the coating layer, sothat bulging and bubble forming caused by a hydrogen evolution effect can be avoided, and the anticorrosive performance of the soft magnet alloy is improved.

Description

technical field [0001] The invention relates to the field of magnetic material manufacture, in particular to a method for preparing an iron-based soft magnet with an anti-corrosion coating. Background technique [0002] At present, power electronic devices are developing in the direction of energy saving, miniaturization and high precision. Soft magnetic materials with high saturation induction (BS), low loss and high permeability (μ) have become an important direction of research and development in the field of magnetic materials. Amorphous and nanocrystalline soft magnetic alloys have gradually become a hot spot for development by various related companies and research institutions in recent years because of their soft magnetic properties. [0003] Nanocrystalline soft magnetic alloys are Fe-based amorphous alloys prepared by single-roller melt quenching. After heat treatment, uniformly distributed α-Fe grains of about 10nm are precipitated from the amorphous alloys. Sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153H01F41/02C25D5/20C25D7/00
CPCH01F1/15383C25D5/20C25D7/001H01F41/02
Inventor 不公告发明人
Owner SUZHOU NANER MATERIAL TECH CO LTD
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