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A kind of nanocrystalline alloy and preparation method thereof

A nanocrystalline alloy, a fast technology, used in manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of insensitivity to service temperature and low loss, and achieve stable performance, safety and reliability, low high frequency loss, and broad application prospects. Effect

Active Publication Date: 2022-03-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The present invention aims to solve the problem of temperature sensitivity of nanocrystalline soft magnetic materials in the prior art, and optimizes the performance of the alloy through the selection of alloy elements and heat treatment parameters such as magnetic field, speed, temperature, time, etc., and the regulation of grain precipitation and free volume release, and obtains Nanocrystalline alloy material with low loss and insensitivity to service temperature

Method used

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  • A kind of nanocrystalline alloy and preparation method thereof
  • A kind of nanocrystalline alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Obtain Fe by smelting 77 Cu 1 Si 10 B 9 Nb 1 Mo 1 Dy 1 Alloy strip, the alloy strip is placed in a heat treatment furnace;

[0047] (2) Slowly raise the temperature to 350°C at a heating rate of 0.01°C / min under the amplitude of the alternating magnetic field of 0.1T and the frequency of 0.1Hz; remove the alternating magnetic field and keep it warm for 0.1min;

[0048] (3) Rapidly raise the temperature to 480°C at a heating rate of 300°C / min, and hold for 1s;

[0049] (4) Increase the transverse static magnetic field with an amplitude of 0.1T, rapidly cool down to 380°C at a rate of 300°C / min, and keep warm for 1s;

[0050] (5) Under the transverse static magnetic field, slowly drop to 260°C at a rate of 0.01°C / min and hold for 0.1min, then quickly drop to room temperature at 300°C / min to obtain a nanocrystalline alloy.

Embodiment 2

[0052] (1) Obtain Fe by smelting 76.5 Cu 1 Si 12.5 B 8 Nb 1 Mo 0.5 Dy 0.5 Alloy strip, the alloy strip is placed in a heat treatment furnace;

[0053] (2) Under the amplitude of the alternating magnetic field of 0.5T and the frequency of 100Hz, the temperature was slowly raised to 400°C at a heating rate of 0.5°C / min; the alternating magnetic field was removed and kept for 10h;

[0054] (3) Rapidly raise the temperature to 590°C at a heating rate of 800°C / min, and hold for 30 minutes;

[0055] (4) Increase the longitudinal static magnetic field with an amplitude of 0.3T, rapidly cool down to 400°C at a rate of 800°C / min, and keep warm for 60 minutes;

[0056] (5) Slowly drop to 320°C at a rate of 1°C / min and keep warm for 100 minutes, then quickly drop to room temperature at 800°C / min to obtain a nanocrystalline alloy.

Embodiment 3

[0058] (1) Obtain Fe by smelting 75.9 Cu 1 Si 13 B 8 Nb 1.5 Mo 0.5 Dy 0.1 Alloy strip, the alloy strip is placed in a heat treatment furnace;

[0059] (2) Slowly raise the temperature to 430°C at a heating rate of 3°C / min at an alternating magnetic field amplitude of 10T and a frequency of 1MHz; remove the alternating magnetic field and keep it warm for 120h;

[0060] (3) Rapidly raise the temperature to 620°C at a heating rate of 1000°C / min, and hold for 60 minutes;

[0061] (4) Increase the transverse and longitudinal static magnetic field with an amplitude of 10T, rapidly cool down to 420°C at a rate of 1000°C / min, and keep warm for 60min;

[0062] (5) Under the transverse and longitudinal static magnetic field, slowly lower the rate of 3°C / min to 340°C for 120h, and then rapidly drop to room temperature at 1000°C / min to obtain a nanocrystalline alloy.

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Abstract

The invention relates to the technical field of soft magnetic alloy materials, and discloses a nanocrystalline alloy and a preparation method thereof. The temperature of FeCuSiBNbMoDy strips is slowly raised to T in an alternating magnetic field. 1 , remove the alternating magnetic field insulation t 1 ;Rapidly heat up to T 2 , insulation t 2 ; rapid cooling down to T under a constant magnetic field 3 , insulation t 3 ; slow down to T 4 , insulation t 4 Then rapidly cool down to room temperature to obtain nanocrystalline alloy. Through the synergistic effect among Fe, Cu, Nb, Si, B, Mo, and Dy elements, the precipitation of disordered phases is effectively promoted, the nucleation rate is increased, and the effective anisotropy constant is reduced. Through the regulation of the preparation process, low loss and Nanocrystalline soft magnetic alloy that is insensitive to service temperature. It can be applied to high-frequency transformers, common-mode inductors, wireless charging, filters and other devices to ensure stable, safe and reliable product performance.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloy materials, in particular to a nanocrystalline alloy insensitive to service temperature and a preparation method thereof. Background technique [0002] With the emergence of the energy crisis and the development of science and technology, the world is paying attention to energy saving and low-carbon environmental protection, which requires electronic devices to develop in the direction of miniaturization, high efficiency, and high frequency low energy consumption. Compared with traditional soft magnetic materials such as traditional soft ferrite, silicon steel and permalloy, nanocrystalline soft magnetic alloy has the following advantages: [0003] 1) Energy saving in manufacturing: adopting rapid solidification technology, it can be formed into strips in an ultra-short time (<10s). [0004] 2) Low eddy current loss: the tape is thin, with a thickness of 18-20 microns, and the high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/52C21D1/04C22C38/16C22C38/02C22C38/12C22C45/02H01F1/153
CPCC21D9/52C21D1/04C22C38/16C22C38/02C22C38/002C22C38/12C22C38/005C22C45/02H01F1/15308H01F1/15325H01F1/15333C21D2201/03
Inventor 贺爱娜杨富尧张博峻董亚强黎嘉威马光冯砚厅陈新韩钰高洁刘洋程灵何承绪
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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