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Fe-based soft magnetic composite material and preparation method thereof

A soft magnetic composite material, iron-based technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as reducing the magnetic permeability and saturation magnetic induction intensity of magnetic powder cores, and affecting the performance of magnetic powder cores

Inactive Publication Date: 2019-05-07
BEIJING COMPO ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coating methods of the above two methods form a non-magnetic passivation layer on the surface of the powder particles, which has a significant side effect of "magnetic dilution" on the magnetic powder core, reducing the magnetic permeability and saturation magnetic induction of the magnetic powder core, thus affecting the performance of the magnetic powder core.

Method used

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  • Fe-based soft magnetic composite material and preparation method thereof
  • Fe-based soft magnetic composite material and preparation method thereof

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Embodiment 1

[0023] This embodiment relates to a method for preparing an iron-based soft magnetic composite material, comprising the following steps:

[0024] Firstly, industrial pure iron, polysilicon, aluminum-silicon master alloy, electrolytic nickel and electrolytic manganese are selected as raw materials, and the ingredients are calculated according to the mass percentage of FeSiAl alloy as Fe 84.5%, Si 9.5% and Al 5.5%, wherein the content of Ni and manganese is 0.1%. Add the above-mentioned raw materials of pure iron, polysilicon, electrolytic nickel and manganese to the intermediate frequency smelting furnace, the alloy melting temperature is 1500-1600 ℃, keep warm for 3 minutes, and then add the silicon-aluminum master alloy;

[0025] The alloy melt is prepared into alloy powder by water atomization pulverization process. It should be noted that compared with other pulverization methods, the water atomization pulverization method mainly has low segregation, high solidification rat...

Embodiment 2

[0033] This embodiment relates to a method for preparing an iron-based soft magnetic composite material, comprising the following steps:

[0034] First select industrial pure iron and electrolytic nickel as raw materials, calculate the ingredients according to the mass percentage of FeNi alloy as Fe 50% and Ni 50%, put the above raw materials into the intermediate frequency melting furnace, the alloy melting temperature is 1520-1610 ℃, and keep warm for 2 minutes;

[0035] The alloy melt was prepared into alloy powder by water atomization pulverization process, the water atomization pressure was 70 MPa, the diameter of the catheter was 6 mm, and the water flow rate was 40 L / min. The average particle size D50 of the prepared powder is 15 μm, and the oxygen content is 1000 ppm;

[0036] Dry the prepared water atomized FeNi50 alloy powder, and sieve the -200 mesh finished powder. Then, the dried and sieved FeNi50 alloy powder is spheroidized by the plasma spheroidization equipme...

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Abstract

The embodiment of the invention discloses an Fe-based soft magnetic composite material and a preparation method thereof. The method comprises the following steps of: performing plasma spheroidizationtreatment on Fe-based magnetic powder; obtaining spheroidal magnetic powder; and performing surface bluing treatment on the spheroidal magnetic powder to obtain a Fe-based soft magnetic composite material. According to the embodiment of the invention, the powder is subjected to plasma spheroidization treatment to obtain fine and spheroidal Fe-based soft magnetic alloy powder. The spheroidal Fe-based soft magnetic alloy powder is subjected to bluing treatment to perform in-situ generation of a magnetic insulating coating layer at the surface of the Fe-based magnetic powder to finally obtain thespheroidal Fe-based metal soft magnetic powder with the uniform and dense coating layer so as to achieve the purpose of improving the magnetic permeability and the saturation flux density of the magnetic powder cores.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of preparation of magnetic materials, in particular to an iron-based soft magnetic composite material and a preparation method thereof. Background technique [0002] Metal magnetic powder core is a kind of soft magnetic composite material prepared by powder metallurgy technology, using soft magnetic powder as raw material, mixed with insulating medium and then pressed. Metal magnetic powder cores have special functions of magnetoelectric conversion and energy storage filtering, and are widely used in fields such as photovoltaics, charging piles, and switching power supplies. The magnetic properties and physical properties of metal soft magnetic powder cores are significantly affected by the composition and particle size of raw material powder, insulation coating, compression molding and post-treatment processes. In order to reduce the magnetic loss of the metal soft magnetic powder...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F41/00
Inventor 贺会军盛艳伟胡强赵新明王志刚安宁朱捷张富文赵文东杨铭
Owner BEIJING COMPO ADVANCED TECH
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