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Preparation method of high-permeability aerosolized iron silicon aluminum magnetic powder core

A technology of high magnetic permeability and sendust powder, which is applied in the manufacture of inductors/transformers/magnets, electrical components, metal processing equipment, etc., and can solve the problem that the formability and permeability of sendust magnetic powder cores cannot be optimized at the same time. problem, to achieve the effect of reducing the breath of the magnetic core, improving the magnetic permeability, and simple process

Active Publication Date: 2019-01-29
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problem that the formability and magnetic permeability of the sendust magnetic powder core prepared by the aerosol method in the prior art cannot be optimized at the same time. The present invention provides an aerosol with good formability and high magnetic permeability Preparation method of FeSiAl2 magnetic powder core

Method used

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  • Preparation method of high-permeability aerosolized iron silicon aluminum magnetic powder core

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Experimental program
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Embodiment 1

[0024] Take by weighing the raw material that total weight is 200kg, wherein the aluminum ingot of 10.8kg, the ferrosilicon ingot of 25.6kg, the surplus is iron, wherein silicon content is 75wt% in the ferrosilicon ingot, is placed in vacuum high-frequency induction furnace and smelts, waits for After melting, remove the scum; choose 2.5MPa pressure nitrogen in the tundish of the atomization equipment for atomization powder; sieve the powder, and then carry out particle size combination, the powder particle size distribution is -200 ~ +300 mesh, -300 mesh ~+400 mesh, -400 mesh or less, the weight ratio of the three is 2:3:15; put the mixed powder into the H 2 Carry out heat treatment under atmosphere protection for 1.5 hours, heat treatment temperature is 800 ℃; take heat treated powder 20kg and 1kg aluminum alloy chromium-free passivating agent solution and mix and stir, stirring time is 25 minutes, take it out and dry it at room temperature for 4 hours, then place In the ove...

Embodiment 2

[0028] Take by weighing the raw material that gross weight is 200kg, wherein the aluminum ingot of 10.4kg, the ferrosilicon ingot of 20.5kg, the surplus is iron, wherein silicon content is 90wt% in the ferrosilicon ingot, puts in the vacuum high-frequency induction furnace to smelt, waits for After melting, remove the scum; choose 3MPa pressure nitrogen in the tundish of the atomization equipment to atomize and make powder; sieve the powder, and then carry out particle size combination. The powder particle size distribution is -200~+300 mesh, -300~ +400 mesh, -400 mesh or less, the weight ratio of the three is 1:1:10; put the mixed powder into the H 2Carry out heat treatment under atmosphere protection for 3 hours, and the heat treatment temperature is 760°C; take 20kg of heat-treated powder and 1.2kg of aluminum alloy chromium-free passivator solution and mix and stir for 20 minutes, take it out and dry it at room temperature for 6 hours, and then place In the oven, the flatt...

Embodiment 3

[0032] Take by weighing the raw material that total weight is 200kg, wherein the aluminum ingot of 11.6kg, the ferrosilicon ingot of 21.6kg, the surplus is iron, wherein silicon content is 95wt% in the ferrosilicon ingot, is placed in vacuum high-frequency induction furnace and smelts, waits for After melting, remove the scum; choose 3MPa pressure nitrogen in the tundish of the atomization equipment to atomize and make powder; sieve the powder, and then carry out particle size combination. The powder particle size distribution is -200~+300 mesh, -300~ +400 mesh, -400 mesh or less, the weight ratio of the three is 3:4:13; put the mixed powder into the H 2 Carry out heat treatment under atmosphere protection for 3 hours, and the heat treatment temperature is 760°C; take 20kg of heat-treated powder and 1.2kg of aluminum alloy chromium-free passivator solution and mix and stir for 20 minutes, take it out and dry it at room temperature for 6 hours, and then place In the oven, the f...

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Abstract

The invention relates to the technical field of metal soft magnetic materials, and discloses a preparation method of a high-permeability aerosolized iron silicon aluminum magnetic powder core. The preparation method comprises the steps of 1) aerosolized powdering, 2) granularity combination, 3) powder thermal treatment, 4) insulating coating, 5) secondary coating, 6) pressing and molding, 7) magnetic core annealing and 8) impregnation spraying. The aerosolized iron silicon aluminum magnetic powder has the advantages of being good in formability and high in permeability.

Description

technical field [0001] The invention relates to the technical field of metal soft magnetic materials, in particular to a method for preparing a gas-atomized Fe-Si-Al magnetic powder core with high magnetic permeability. Background technique [0002] Sendust is an important kind of metal magnetic powder core. Because of its low loss and low cost, it plays an important role in soft magnetic materials in the electronics industry. With the development of the new energy industry, its application range and usage are increasing rapidly. ; Because sendust is brittle, it is easy to make powder. Since the invention of the American company, the flake sendust powder has been prepared by crushing method, and then the powder core is prepared by insulating coating, molding and annealing. At present, the domestic preparation method of gas-atomized Fe-Si-Al magnetic powder core mainly adopts the crushing method. For example, the Chinese Patent Publication No. CN101226804 discloses a manufact...

Claims

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Application Information

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IPC IPC(8): H01F41/02B22F9/08B22F1/00B22F1/02C22C38/02C22C38/06C23C22/36
CPCH01F41/0246C22C38/02C22C38/06C23C22/368B22F9/082C23C2222/20B22F1/052B22F1/102B22F1/142B22F1/145B22F3/02B22F2003/248B22F3/26B22F2998/10
Inventor 郭宾吕世雅
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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