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Preparation method of iron-silicon-chromium-manganese-bismuth-zinc alloy soft magnetic powder

A technology of iron silicon chromium manganese bismuth and soft magnetic powder, which is applied in the field of soft magnetic alloy powder, can solve the problems of low tap density, low resistivity, poor electrical resistance, etc., and achieve improved tap density, resistivity, and The effect of mobility

Active Publication Date: 2022-03-08
泉州市鑫航新材料科技有限公司
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Problems solved by technology

[0004] The invention provides a method for preparing soft magnetic powder of iron silicon chromium manganese bismuth zinc alloy to solve the defects of low tap density, low resistivity, poor electrical resistance and low rust resistance existing in the existing metal soft magnetic powder

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  • Preparation method of iron-silicon-chromium-manganese-bismuth-zinc alloy soft magnetic powder

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Embodiment Construction

[0018] The specific implementation manner of the embodiment of the present invention is described below.

[0019] A kind of preparation method of iron silicon chromium manganese bismuth zinc alloy soft magnetic powder, comprising

[0020] Follow the steps below:

[0021] 1) Add the soft magnetic alloy powder raw material containing iron, silicon, chromium, manganese, bismuth and zinc into the intermediate frequency induction furnace, and use argon blowing protection to smelt to obtain the alloy liquid. Preferably, the mass ratio of soft magnetic alloy powder raw materials is: chromium 2-10%, silicon 2-8%, manganese 0.1-2%, bismuth 0.1-2%, zinc 0.1-2%, iron balance.

[0022] Further, in the smelting process, gas bricks are pre-buried at the bottom of the prefabricated crucible, the furnace mouth of the intermediate frequency induction furnace is closed with a furnace cover, and argon is used as the furnace mouth protection gas. When smelting, first put iron, chromium and sili...

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Abstract

The invention relates to a preparation method of iron-silicon-chromium-manganese-bismuth-zinc alloy soft magnetic powder, which comprises the following steps of: 1) adding soft magnetic alloy powder raw materials containing iron, silicon, chromium, manganese, bismuth and zinc into a medium-frequency induction furnace, and smelting by adopting argon blowing protection to obtain alloy liquid; (2) under the nitrogen protection condition, the alloy liquid is poured into an atomizing tower in a negative pressure environment, in the pouring process, two media of negative pressure overspeed gas and high pressure atomized water act on an alloy liquid column flow in sequence, the alloy liquid column flow is dispersed and torn into metal liquid drops under the action of negative pressure supersonic speed gas, and then the metal liquid drops are separated from the metal liquid drops; and then through impact and cooling of high-pressure atomized water, the metal liquid drops are further crushed and cooled into nearly-spherical metal powder particles, and meanwhile a compact composite oxidation film is formed on the surfaces of the metal powder particles. The method can be used for preparing the iron-silicon-chromium-manganese-bismuth-zinc alloy soft magnetic powder with high tap density and high surface resistivity, and the iron-silicon-chromium-manganese-bismuth-zinc alloy soft magnetic powder is widely applied as a powder raw material of an inductor device.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloy powder, in particular to a method for preparing soft magnetic powder of iron-silicon-chromium-manganese-bismuth-zinc alloy. Background technique [0002] At present, metal soft magnetic powder is usually mainly made of iron silicon chromium, which is made by chemical reaction method, melt atomization method, mechanical crushing method and point solution deposition method. Among them, alloy powder is prepared by melt atomization method It has the same chemical composition as the established molten alloy, and also has a typical rapid solidification structure, a wide range of alloy composition, good sphericity of powder shape, and wide particle size distribution. It is widely used in the production of metal soft magnetic powder. [0003] However, with the development of science and technology, the application of electronic components is becoming wider and wider, and with the improvement o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C22C38/34C22C38/04C22C38/38B22F1/065B22F1/16H01F1/147
CPCB22F9/082C22C38/34C22C38/002C22C38/04C22C38/38H01F1/147H01F1/14766B22F2009/0836B22F2009/0848B22F2009/0824B22F2009/0828B22F2009/0844
Inventor 王冲黄莹祥
Owner 泉州市鑫航新材料科技有限公司
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