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A heat treatment method for preparing nanocrystalline magnetic core

A heat treatment method and nanocrystalline technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of long process cycle, high annealing equipment, and complexity, and achieve short heat treatment time, uniform stress distribution, and improved uniformity Effect

Active Publication Date: 2021-11-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the external magnetic field puts higher and more complicated requirements on the annealing equipment, and the unqualified products need to be treated with a second magnetic field, and the process cycle is longer

Method used

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  • A heat treatment method for preparing nanocrystalline magnetic core
  • A heat treatment method for preparing nanocrystalline magnetic core
  • A heat treatment method for preparing nanocrystalline magnetic core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A heat treatment method for preparing a nanocrystalline magnetic core, comprising the following steps:

[0031] (1) Select the grade as 1K107 (T x 798K) quenched strip Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 , the strip with a width of 5mm is wound into a ring core with an outer diameter of 14mm and an inner diameter of 10mm by a winding machine, and the thickness of the ring core is 2mm;

[0032] (2) Selecting a copper strip with a thickness equal to that of the iron-based amorphous alloy strip and having a thickness of 0.1 mm is wound into a circular copper strip roll, and the outer end is fixed by spot welding. The number of layers of the copper strip roll It is 5 layers, the thickness ratio of the corresponding annular magnetic core to the copper coil is 4:1, the layers of the copper coil are in close contact with each other, and the distance between the inner side of the copper coil and the outer side of the magnetic core is 1 mm; then placed in the quartz In the tube,...

Embodiment 2

[0034] A kind of heat treatment method for preparing nanocrystalline magnetic core is as described in embodiment 1, and difference is that the thickness ratio of annular magnetic core and copper tape volume is 10:3, and annealing temperature is 785K (T x -13K), the holding time is 7min.

Embodiment 3

[0036] A kind of heat treatment method for preparing nanocrystalline magnetic core is as described in embodiment 1, and difference is that the thickness ratio of annular magnetic core and copper tape volume is 2.5:1, and annealing temperature is 773K (T x -25K), the holding time is 20min.

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Abstract

The invention provides a heat treatment method for preparing a nanocrystalline magnetic core, comprising the following steps: winding a quenched iron-based amorphous alloy strip into a ring-shaped magnetic core; a copper strip coil is arranged around the outer circumference of the annular magnetic core, The distance between the inner side of the copper strip coil and the outer side of the annular magnetic core is 0.5 to 1 mm; after that, it is placed in a quartz tube, evacuated, and then the quartz tube is placed in an annealing furnace heated to an annealing temperature for heat preservation; after the heat preservation is completed , cooled to 563K-583K with the furnace, and then cooled to room temperature by water cooling, and the copper tape roll was removed to obtain a nanocrystalline magnetic core. The heat treatment method of the invention utilizes the good thermal conductivity of copper to improve the temperature distribution of the magnetic core, promotes simultaneous crystallization inside and outside the magnetic core, improves the initial magnetic permeability, shortens the annealing time, and further improves the heat treatment efficiency.

Description

technical field [0001] The invention relates to a heat treatment method for preparing a nanocrystalline magnetic core, belonging to the technical field of metal material processing. Background technique [0002] Iron-based amorphous alloy material is an amorphous material formed by rapid quenching technology with iron as the main element and a small amount of Nb, Cu, Si, and B elements. After heat treatment, it can obtain a diameter of 10-20nm The microcrystals are dispersed and distributed on the amorphous matrix, so as to obtain the iron-based nanocrystalline alloy material. Compared with amorphous alloys, nanocrystalline materials have excellent soft magnetic properties at high frequencies, mainly reflected in reduced loss and increased magnetic permeability, which makes iron-based nanocrystalline materials widely used in transformers, sensors and micro on electronic equipment. [0003] The nanocrystalline magnetic core is a ring-shaped device that uses an amorphous all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00H01F41/02C21D1/26C21D6/00
CPCC21D1/26C21D6/00C21D9/00C21D2201/03H01F41/02
Inventor 李雪莲潘琳茹王丽
Owner SHANDONG UNIV
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