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Magnetic field heat treatment method for improving high frequency magnetic property of iron based nanocrystal

A technology of iron-based nanocrystals and heat treatment methods, applied in heat treatment furnaces, heat treatment equipment, inductors/transformers/magnets manufacturing, etc., can solve problems such as inductance drop, unstable magnetic performance, and increased core energy loss, etc., to achieve reduction Loss, the effect of increasing the effective permeability

Inactive Publication Date: 2019-05-10
GUANGDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

This is because as the frequency increases, first of all, the effective permeability of the core material will rapidly decay, and the inductance will also decrease. Such changes are not conducive to the design of magnetic devices and the realization of their functions; secondly, the frequency The increase will increase the energy loss of the magnetic core, which is not conducive to the green development direction of energy saving and emission reduction. At the same time, it will also increase the temperature of the magnetic core, resulting in unstable magnetic properties.

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  • Magnetic field heat treatment method for improving high frequency magnetic property of iron based nanocrystal
  • Magnetic field heat treatment method for improving high frequency magnetic property of iron based nanocrystal
  • Magnetic field heat treatment method for improving high frequency magnetic property of iron based nanocrystal

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Embodiment 1

[0033] Such as Figure 1 to Figure 6 As shown, this embodiment discloses a magnetic field heat treatment method for improving the high-frequency magnetic properties of iron-based nanocrystals. The magnetic field heat treatment method mainly includes the following steps:

[0034] Step S1: Roll the strip into a ring core with outer diameter, inner diameter, and height of 23*15*10mm respectively. In order to ensure that the core has the same lamination coefficient K, the ring core can be processed under different process conditions. The performance test is comparative, and this step is realized by controlling the linear speed of strip rolling, the magnitude of stress and the weight of the magnetic core.

[0035] Step S2: The heat treatment of the annular magnetic core is carried out in two system devices respectively. First, the magnetic core is placed in a heat treatment tube furnace for crystallization annealing treatment, and the ɑ-Fe(Si) nanocrystalline phase is precipitated....

Embodiment 2

[0047] This embodiment discloses a magnetic field heat treatment method for iron-based nanocrystals. Through research, it is found that improving the high-frequency soft magnetic properties of amorphous nanocrystal magnetic materials can be done from the perspectives of material composition, strip thickness, and heat treatment process. Bring to purpose. The required amorphous and nanocrystalline strips of the present invention are provided by Dongguan Meiyi Magnetic Technology Co., Ltd., and the nominal composition of the strips is Fe 73.5 Si 15.5 B 7 Cu 1 Nb 3 , the strip width is 10mm, and the thickness is 18±2um.

[0048] The technical solution is as follows:

[0049] 1) Roll the strip into an annular magnetic core with outer diameter*inner diameter*height = 23*15*10mm, in order to ensure that the magnetic core has the same lamination coefficient K, so that the performance of the annular magnetic core after processing under different process conditions The test is com...

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Abstract

The invention discloses a magnetic field heat treatment method for improving high frequency magnetic property of iron based nanocrystal. The magnetic field heat treatment method for improving the highfrequency magnetic property of the iron based nanocrystal comprises the following steps that a belt material is rolled into a ring shape magnetic core, heat treatment is conducted in two system devices respectively, firstly the magnetic core is placed in a heat treatment tube furnace, crystallization annealing is conducted, and alpha-Fe (Si) nanocrystal phase is separated out; then the magnetic core after crystallization is placed in a high-intensity magnetic field heat treatment furnace, crossed magnetic field heat treatment is conducted, magnetic anisotropy of the magnetic core is generatedin the magnetic field applying direction, and thus magnetic property of the magnetic core in high frequency is improved; a precision magnetic element analyzer is used for measuring the single-turn inductance value of the treated magnetic core, and effective magnetic conductivity is conversed through formulas; then loss of the magnetic core in the high frequency is measured using a soft magnetic alternating current testing device; and finally, the phase structure of a magnetic core sample is analyzed using an X-ray analyzer, and a detecting result is acquired and is compared with an existing magnetic core. The magnetic field heat treatment method for improving the high frequency magnetic property of the iron based nanocrystal further has the advantages that the logic is clear, the operation is simple, and implement is easy to conduct.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a magnetic field heat treatment method for improving the high-frequency magnetic properties of iron-based nanocrystals. Background technique [0002] In recent years, with the development of power electronics technology in the direction of high frequency, high current, miniaturization, and high efficiency and energy saving, pure iron and silicon steel, which occupy nearly 80% of the market share of soft magnetic materials, cannot meet the requirements of electronic magnetic components due to their large losses. Such development requires. There is no doubt that silicon steel sheets have been the most important soft magnetic materials in the past 100 years, and they are widely used in distribution transformers, motors and generators. Although the silicon steel sheet has a saturation magnetization B of up to 2T S value, but because of its low permeability μ (about 10 3 ) and hig...

Claims

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Application Information

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IPC IPC(8): C21D1/04C21D1/26C21D1/74C21D9/00H01F41/02
Inventor 罗厅杨元政李美瑶杨会军
Owner GUANGDONG UNIV OF TECH
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