A kind of preparation method of fesi alloy powder with high direct current superposition characteristic

A high DC superposition, alloy powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as poor superposition characteristics, and achieve the effect of reducing the complexity of smelting operations, uniform composition, and good formability

Active Publication Date: 2022-05-06
马鞍山新康达磁业股份有限公司
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  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the DC superposition value of FeSi alloy powder prepared by the existing water atomization and crushing method is less than the reference standard value and the superposition property is poor, the present invention provides a method for preparing FeSi alloy powder with high DC superposition property, and the preparation method is operable Strong, the prepared powder has uniform composition without segregation, low oxygen content, high sphericity, easy insulation coating, good electromagnetic properties, and excellent DC superposition characteristics

Method used

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  • A kind of preparation method of fesi alloy powder with high direct current superposition characteristic
  • A kind of preparation method of fesi alloy powder with high direct current superposition characteristic
  • A kind of preparation method of fesi alloy powder with high direct current superposition characteristic

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Embodiment 1

[0037]A method for preparing FeSi alloy powder with high DC superposition characteristics in this embodiment specifically includes the following steps:

[0038] A) Batching Each raw material is weighed and batched, and the weight percentage of each raw material is: silicon 3.75%, manganese 0.03%, chromium 0.02%, iron is a surplus, and raw materials include rod-shaped polished iron and massive metal silicon;

[0039] B) Melting Put the prepared charge into the melting furnace, adopt the non-vacuum melting process, set the power of the intermediate frequency furnace, gradually increase from 0kw to the normal smelting power to 500kw, first melt the iron, and reduce the power of the intermediate frequency furnace to 0kw after the iron is melted Pick up the iron slag, then increase the power of the intermediate frequency furnace to 500kw to melt silicon, reduce the power of the intermediate frequency furnace to 0kw after the silicon is melted, remove the slag on the surface of the a...

Embodiment 2

[0068] A method for preparing FeSi alloy powder with high DC superposition characteristics in this embodiment specifically includes the following steps:

[0069] A) batching Each raw material is carried out weighing batching, and each raw material percentage by weight is: silicon 4.5%, manganese 0.04%, chromium 0.02%, iron is surplus;

[0070] B) Smelting Put the prepared charge into the smelting furnace, adopt the non-vacuum smelting process, set the power of the intermediate frequency furnace, gradually increase from 0kw to the normal smelting power to first melt 450kw iron, and reduce the power of the intermediate frequency furnace to 25kw after the iron is melted Pick up the iron slag, then increase the power of the intermediate frequency furnace to 500kw to melt silicon, reduce the power of the intermediate frequency furnace to 25kw after the silicon is melted, remove the slag on the surface of the alloy melt, and then keep the power of 250kw for refining, after refining f...

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Abstract

The invention discloses a method for preparing FeSi alloy powder with high DC superposition characteristics, and belongs to the technical field of alloy powder preparation. Based on pure iron and metal silicon as the furnace charge, add a small amount of manganese and chromium, weigh the ingredients according to a specific ratio, use non-vacuum melting to obtain the alloy melt with the required composition, and then use inert gas atomization to obtain the original alloy powder. The raw powder is collected, sieved, and graded to obtain a fine powder. This method is beneficial to obtain alloy powder with uniform composition and high purity, and the powder has high sphericity. After insulating coating, it is easy to form a uniform and dense insulating layer, which can effectively block the contact of the alloy matrix. The pressed magnetic powder core has good DC Overlay feature.

Description

technical field [0001] The invention belongs to the technical field of alloy powder preparation, and more specifically relates to a method for preparing FeSi alloy powder with high DC superposition characteristics. Background technique [0002] With the development of electronic technology, equipment is developing in the direction of miniaturization and light weight, and the requirements for "high frequency, miniaturization, and low power consumption" are also put forward for electronic devices. Therefore, metal magnetic powder cores used in various electronic products requirements have also increased accordingly. FeSi magnetic powder core is prepared by powder metallurgy process, its resistivity is much higher than alloy soft magnetic materials such as silicon steel, so its eddy current loss is small, and it can work at higher frequency; at the same time, its excellent DC superposition characteristics and low loss It just fills the gap between iron powder cores and other a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08C22C38/04C22C38/34B22F1/065
CPCB22F9/082C22C38/04C22C38/34B22F2009/0848B22F2999/00B22F2201/02B22F2201/11B22F1/065
Inventor 赵利明纪国峰赵光陈实潘全成
Owner 马鞍山新康达磁业股份有限公司
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