A preparation method of μ=60 iron-nickel soft magnetic powder core

A magnetic powder core, iron-nickel technology, applied in the field of preparation of μ = 60 iron-nickel soft magnetic powder core, can solve the problem of poor DC superposition performance and loss performance of the magnetic powder core, can not eliminate the internal stress of the magnetic core well, and affect the power of the magnetic powder core Loss and other issues, to achieve the effect of high DC superposition performance, simple equipment and process, and low cost

Active Publication Date: 2018-08-17
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The addition of organic resin can reduce the eddy current loss to a certain extent, but the heat treatment temperature of the magnetic core is limited by the characteristics of the resin, which cannot eliminate the internal stress of the magnetic core well. At the same time, the decomposition of the organic resin is prone to cracks, which reduces the insulation of the magnetic powder. , thus affecting the power loss and other properties of the magnetic powder core
[0004] The invention patent of patent number CN200610018160.4 discloses the use of water atomized iron-nickel magnetic powder, through powder annealing treatment, insulation coating to prepare iron-nickel magnetic powder core, but due to the high oxygen content of the water atomized powder, and the shape of the powder is irregular Sheet structure, so the DC superposition performance and loss performance of the magnetic powder core are poor

Method used

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  • A preparation method of μ=60 iron-nickel soft magnetic powder core

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Experimental program
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Effect test

Embodiment 1

[0022] Take the gas-atomized FeNi powder, wherein the content of nickel is 50%, and the balance is iron, and use an ultrasonic vibrating sieve to classify it according to two particle sizes of +45 μm and -45 μm, and then press +45 μm:-45 μm=2:3 Mix the ratio evenly; put it in the annealing furnace, blow nitrogen, and keep it warm at 800°C for 6 hours; add the magnetic powder into the aluminum dihydrogen phosphate solution and heat it to 150°C and roast until dry. After cooling, add the magnetic powder into the water glass and kaolin to mix The solution is heated to 150°C and roasted until dry, wherein the amount of aluminum dihydrogen phosphate is 1% of the weight of the iron-nickel magnetic powder, the amount of water glass is 1.2% of the weight of the iron-nickel magnetic powder, and the amount of kaolin is 0.8% of the weight of the iron-nickel magnetic powder. %; add molybdenum disulfide 1% of the weight of iron-nickel magnetic powder as a release agent before pressing and f...

Embodiment 2

[0024] Take the gas-atomized FeNi powder, wherein the content of nickel is 45%, and the balance is iron, and use an ultrasonic vibrating sieve to classify it according to two particle sizes of +45 μm and -45 μm, and then press +45 μm:-45 μm=2:3 Mix the ratio evenly; put it into an annealing furnace, pass hydrogen, and keep it warm at 900°C for 1 hour; add the magnetic powder into the aluminum dihydrogen phosphate solution and heat it to 180°C and roast until dry. After cooling, add the magnetic powder into the water glass and kaolin to mix The solution is heated to 180°C and roasted until dry, wherein the amount of aluminum dihydrogen phosphate is 2% of the weight of the iron-nickel magnetic powder, the amount of water glass is 0.5% of the weight of the iron-nickel magnetic powder, and the amount of kaolin is 0.5% of the weight of the iron-nickel magnetic powder. %; Add 0.8% of iron-nickel magnetic powder weight stearate as a release agent before pressing and forming. After mix...

Embodiment 3

[0026] Take the gas-atomized FeNi powder, wherein the content of nickel is 42%, and the balance is iron, and use an ultrasonic vibrating sieve to classify it according to two particle sizes of +45 μm and -45 μm, and then press +45 μm:-45 μm=2:3 Mix the ratio evenly; put it into the annealing furnace, pass the mixed gas of nitrogen and hydrogen, and keep it warm at 850°C for 3h; add the magnetic powder into the aluminum dihydrogen phosphate solution and heat it to 120°C and roast until dry, after cooling, add the magnetic powder into the Heating to 120°C in a mixed solution of water glass and kaolin and roasting until dry, wherein the amount of aluminum dihydrogen phosphate is 0.5% of the weight of the iron-nickel magnetic powder, the amount of water glass is 2% of the weight of the iron-nickel magnetic powder, and the amount of kaolin is 0.5% of the weight of the iron-nickel magnetic powder. 1% of the weight of nickel magnetic powder; before pressing and forming, add a mixture ...

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Abstract

The invention discloses a preparation method of a μ=60 iron-nickel soft magnetic powder core. It uses gas-atomized FeNi powder, through the particle size ratio of iron-nickel powder, powder annealing treatment, insulation coating, compression molding, core heat treatment and surface coating process, to realize the preparation of μ = 60 iron-nickel soft magnetic powder core . The beneficial effects of the present invention are: the required equipment and process are simple, and the cost is low; the product performance is excellent, with high DC superposition performance, very low power loss and high quality factor, reaching the industry-leading level; avoiding organic The use of the binder increases the heat treatment temperature of the magnetic powder core, and at the same time reduces the exhaust gas pollution generated by the organic matter during the heat treatment process.

Description

technical field [0001] The invention relates to the related technical field of soft magnetic materials, in particular to a method for preparing a μ=60 iron-nickel soft magnetic powder core. Background technique [0002] Metal soft magnetic powder cores have the advantages of high saturation magnetic induction, high Curie temperature and high DC superposition performance, and are widely used in high-current power devices. Among them, the iron-nickel soft magnetic powder core has the best DC superposition performance, and has the advantages of high saturation magnetic induction, high Curie temperature, low magnetostriction coefficient (low noise) and low cost, so it has a large market capacity . [0003] The invention patent with the patent number CN201110133836.5 discloses a manufacturing method of an iron-nickel soft magnetic alloy material. The process adopts phosphoric acid passivation, adds phenolic resin for bonding, and then presses and shapes. The addition of organic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147B22F1/00B22F1/02B22F3/02
CPCB22F1/0003H01F1/1475B22F3/02B22F1/142B22F1/16
Inventor 吴波涛姚骋张章明
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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