A composite magnetic core and a preparation method thereof

A technology of composite materials and magnetic cores, which is applied in the manufacture of magnetic cores, magnetic materials, inductors/transformers/magnets, etc., can solve the problems of low saturation magnetic induction, high brittleness, and high coercive force, and achieve high production efficiency and low Requirements, the effect of low raw material cost

Inactive Publication Date: 2018-12-14
江门市汇鼎科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the nanocrystalline materials used in the above-mentioned electronic components on the market still have problems such as

Method used

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  • A composite magnetic core and a preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] The composite magnetic core prepared in this embodiment is composed of the following components: Fe 73.8%, B 8.5%, Si 12.5%, C 0.5%, Cu 1.7%, Nb 2.5%, Mo 0.5%.

[0054] Prepare as follows:

[0055] (1) Fe, B, Si, C, Cu, Nb and Mo with a purity higher than 99.9% are used as raw materials, and the ingredients are weighed according to the formula amount, and the prepared raw materials are placed in a vacuum intermediate frequency induction melting furnace. Electromagnetic stirring was used to repeatedly smelt for 2.5 hours under gas atmosphere to obtain a master alloy with uniform composition;

[0056] (2) Put the master alloy obtained in step (1) into the smelting ladle in the rapid solidification equipment, adopt a single-roller strip-making process, and make strips at a speed of 30m / s to obtain a strip with a width of 60mm and a thickness of 20μm alloy;

[0057] (3) Wind the strip-shaped alloy obtained in step (2) into a magnetic core, place it in a heat treatment dev...

Embodiment 2

[0059] The composite magnetic core prepared in this embodiment is composed of the following components: Fe 71.5%, Co 2.5%, B 10%, Si 10%, P 1%, Cu 2.0%, Nb 2.5%, Ti 0.5%.

[0060] Prepare as follows:

[0061] (1) Fe, Co, B, Si, P, Cu, Nb and Ti with a purity higher than 99.9% are used as raw materials, and the ingredients are weighed according to the formula quantity, and the prepared raw materials are placed in a vacuum intermediate frequency induction melting furnace, Under the argon atmosphere, electromagnetic stirring is used for repeated melting for 3 hours to obtain a master alloy with uniform composition;

[0062] (2) Put the master alloy obtained in step (1) into the smelting ladle in the rapid solidification equipment, adopt a single-roller strip-making process, and make strips at a speed of 35m / s to obtain a strip with a width of 50mm and a thickness of 15μm alloy;

[0063] (3) Wind the strip-shaped alloy obtained in step (2) into a magnetic core, place it in a hea...

Embodiment 3

[0065] The composite magnetic core prepared in this embodiment is composed of the following components: 70.3% Fe, 3.7% Co, 10% B, 10% Si, 0.5% C, 0.5% Al, 1.0% Cu, 3% Nb, 0.5% Mo, Ag 0.5%.

[0066] Prepare as follows:

[0067] (1) Use Fe, Co, B, Si, C, Al, Cu, Nb, Mo and Ag with a purity higher than 99.9% as raw materials, weigh the ingredients according to the formula amount, and place the prepared raw materials in a vacuum medium frequency induction In the smelting furnace, under the argon atmosphere, electromagnetic stirring is used to repeatedly smelt for 3 hours to obtain a master alloy with uniform composition;

[0068] (2) Put the master alloy obtained in step (1) into the smelting ladle in the rapid solidification equipment, and adopt a single-roller strip-making process at a speed of 33m / s to obtain a strip with a width of 5mm and a thickness of 20μm alloy;

[0069] (3) Wind the strip-shaped alloy obtained in step (2) into a magnetic core, place it in a heat treatm...

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Abstract

The invention provides a composite magnetic core and a preparation method thereof. The composite magnetic core has stable magnetic permeability, excellent direct current biasing ability, low coercivity and high saturation magnetic induction strength is obtained by regulating the alloy composition and the content of each component and further heat treatment process. The grain size of the material is less than 30nm, and the saturation magnetic induction intensity is 1.1-1.5 T, coercivity less than 6A/m, good comprehensive performance. The method provided by the invention has the advantages of simple preparation process, low cost and no need of high heating rate, wide temperature range and heat preservation time range of heat treatment, easy realization of industrial production, and good economic benefit and application prospect.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a composite material magnetic core and a preparation method thereof. Background technique [0002] With the continuous development of modern electronics and power equipment in the direction of energy saving, miniaturization, thinning and high efficiency, people put forward higher requirements for the magnetic properties of magnetic core materials in electromagnetic conversion devices. [0003] Soft magnetic materials are magnetic materials with low coercive force and high magnetic permeability. Iron cores made of soft magnetic materials are easy to magnetize and demagnetize, and are widely used in electrical and electronic equipment as electromagnetic conversion devices. [0004] Since the last century, silicon steel sheet material has been widely used as a magnetic core material because of its high saturation magnetic induction. However, the coercive force of the silicon steel she...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F41/02
CPCH01F1/14775H01F41/0213
Inventor 张泽强罗益谭俊贤刘志勇
Owner 江门市汇鼎科技有限公司
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