Method for preparing iron silicon soft magnetic alloy powder core

A technology of iron-silicon alloy and soft magnetic alloy, which is applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of unsatisfactory comprehensive performance of iron-silicon alloy powder core, hard-to-break iron-silicon alloy, high price, etc., and achieve Good DC superposition characteristics, high frequency and low loss characteristics, and the effect of meeting performance requirements

Inactive Publication Date: 2013-03-20
GUANGDONG IRON & STEEL INST
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  • Abstract
  • Description
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Problems solved by technology

The atomization methods include gas and water atomization methods; the iron-silicon alloy powder produced by the gas atomization method is a spherical powder with high purity, but poor formability, difficult to suppress, and large investment in equipment, high production costs, and expensive; water atomization The iron-silicon alloy powder produced by this method has irregular shape, high oxygen content, many impurities, high powder core loss, and poor performance; the ord

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  • Method for preparing iron silicon soft magnetic alloy powder core
  • Method for preparing iron silicon soft magnetic alloy powder core
  • Method for preparing iron silicon soft magnetic alloy powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 of the present invention comprises the following steps:

[0021] 1. Use a vacuum quick-setting casting furnace to melt and refine industrial pure iron, crystalline silicon and ferrophosphorus, and produce iron-silicon containing Si 6.5%, P 0.1% and the rest Fe (weight percentage) through quick-setting and rapid quenching Alloy flakes, and then use mechanical crushing method to grind into quick-quenching iron-silicon alloy powder through ring hammer mill;

[0022] 2. Mix the prepared quick-quenched iron-silicon alloy powder with the iron-silicon alloy powder produced by the atomization method according to the ratio of 1:1, and then prepare composite iron-silicon alloy powder by sieving, and its particle size ratio is ≥250 mesh powder Accounted for 65%, 100 ~ 250 mesh powder accounted for 35%;

[0023] 3. Heat treatment of composite iron-silicon alloy powder: put the composite iron-silicon alloy powder into a protective atmosphere furnace, pass in hydrogen g...

Embodiment 2

[0032] Embodiment 2 of the present invention comprises the following steps:

[0033] 1. Industrial pure iron, crystalline silicon and ferrophosphorus are melted and refined in a vacuum quick-setting casting furnace, and the iron-silicon alloy containing Si 6.0%, P 0.45% and the rest is Fe (weight percentage) is produced through quick-setting and rapid quenching flakes, and then use mechanical crushing method to grind into quick-quenching iron-silicon alloy powder through ring hammer mill;

[0034] 2. Mix the prepared quick-quenched iron-silicon alloy powder with the iron-silicon alloy powder produced by the atomization method according to the ratio of 1:1, and then prepare composite iron-silicon alloy powder by sieving, and its particle size ratio is ≥250 mesh powder Accounted for 60%, 100 ~ 250 mesh powder accounted for 40%;

[0035] 3. Heat treatment of the composite iron-silicon alloy powder: put the composite alloy powder into a protective atmosphere furnace, pass in hydr...

Embodiment 3

[0044] Embodiment 3 of the present invention comprises the following steps:

[0045] 1. Industrial pure iron, crystalline silicon and ferrophosphorus are melted and refined in a vacuum quick-setting casting furnace, and the iron-silicon alloy containing Si 6.8%, P 0.3% and the rest is Fe (weight percentage) is produced through quick-setting and rapid quenching flakes, and then use mechanical crushing method to grind into quick-quenching iron-silicon alloy powder through ring hammer mill;

[0046] 2. Mix the prepared quick-quenching iron-silicon alloy powder with the iron-silicon alloy powder produced by the atomization method according to the ratio of 1:1, and then prepare composite iron-silicon alloy powder through sieving, and its particle size ratio is ≥250 mesh powder Accounted for 70%, 100 ~ 250 mesh powder accounted for 30%;

[0047] 3. Heat treatment of composite iron-silicon alloy powder: put the composite alloy powder into a protective atmosphere furnace, pass in hyd...

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Abstract

The invention discloses a method for preparing an iron silicon soft magnetic alloy powder core. The method for preparing the iron silicon soft magnetic alloy powder core comprises the steps of 1, melting an iron silicon alloy by adopting a rapid solidification strip casting furnace, and preparing the alloy into powder by using a ring hammer mill after rapid quenching; 2, mixing the powder with atomized iron silicon alloy powder, and sieving the resultant powder; 3, performing surface treatment on the powder in a protective atmosphere furnace; 4, adding phosphoric acid, deionizer water, isopropanol and normal silicate ester, mixing, stirring and drying in a frying way; 5, pressing the powder into the powder core by using a hydraulic press; 6, performing protective atmosphere heat treatment on the powder core; and 7, performing protective treatment on the surface of the powder core through the reinforcement of epoxy resin and the spray painting. The iron silicon soft magnetic alloy powder core prepared by the method is high in cost performance and has the advantages of direct current overlapping characteristic, high-frequency low-loss and good characteristic; and in addition, the better magnetic performance still can be kept under a high temperature.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a preparation method of an iron-silicon soft magnetic alloy powder core with good performance. Background technique [0002] Ferrosilicon soft magnetic alloy magnetic powder core is suitable for the current application trend of low voltage, high current, high power density and high frequency. It can replace iron powder core, sendust powder magnetic core, iron nickel magnetic powder core and other products. It is a cost-effective The product. It can be applied to inverter power supply, electric power active power factor compensation circuit, solar photovoltaic system power supply filter, etc. [0003] At present, the main production methods of iron-silicon alloy powder are: atomization method and mechanical crushing method. The atomization methods include gas and water atomization methods; the iron-silicon alloy powder produced by the gas atomization method is ...

Claims

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Application Information

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IPC IPC(8): B22F3/02B22F3/26H01F1/147H01F1/22
Inventor 刘志坚陈远星何坤宏
Owner GUANGDONG IRON & STEEL INST
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