Water-gas combined atomization preparation method for iron-silicon-chromium-gallium-indium-nitrogen alloy soft magnetic powder

A water-air combined atomization and soft magnetic powder technology, which is applied in the field of soft magnetic alloy powder, can solve the problems of low rust resistance, low wear resistance, low tap density, and poor electrical resistance, and achieves increased resistivity and vibration. Solid density, good effect on spheroidization

Active Publication Date: 2022-01-04
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 water-gas combined atomization preparation method of iron-silicon-chromium-gallium-indium-nitrogen alloy soft magnetic powder to solve the problems of low tap density, low resistivity, poor electrical resistance and rust resistance existing in the existing metal soft magnetic powder. and defects such as low loss resistance

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Embodiment Construction

[0020] The specific implementation manner of the embodiment of the present invention is described below.

[0021] A water-gas combined atomization preparation method for soft magnetic powder of iron silicon chromium gallium indium nitrogen alloy comprises the following steps:

[0022] 1) Add soft magnetic alloy powder raw materials containing iron, silicon, chromium, gallium, and indium into an intermediate frequency induction furnace, and use argon blowing protection to smelt to obtain alloy liquid.

[0023] 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 silicon into the intermediate frequency induction furnace in order to melt them completely. When the temperature reaches 1580-1600 degrees, start blowing argon at the bottom ...

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Abstract

The invention relates to a water-gas combined atomization preparation method for iron-silicon-chromium-gallium-indium-nitrogen alloy soft magnetic powder. The preparation method comprises the following steps that (1) a soft magnetic alloy powder raw material containing iron, silicon, chromium, gallium and indium is added into a medium-frequency induction furnace, and smelting is conducted by adopting argon blowing protection to obtain alloy liquid; and (2) under the nitrogen protection condition, the alloy liquid is poured into an atomizing tower in a negative pressure environment, two media including negative pressure overspeed gas and a high-pressure ammonia water solution 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, then the metal liquid drops are impacted and cooled through the high-pressure ammonia water solution, the metal liquid drops are further crushed and cooled into nearly-spherical alloy soft magnetic powder, and meanwhile, a compact oxidation film and a compact nitride film are formed on the surface of the alloy soft magnetic powder. The method can be used for preparing the alloy soft magnetic powder with high tap density, high surface resistivity and high loss characteristics, and the alloy soft magnetic powder can be widely applied as a powder raw material of inductor devices.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloy powder, and more specifically refers to a method for preparing soft magnetic powder of iron silicon chromium gallium indium nitrogen alloy combined with water and air atomization. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08C22C38/34H01F1/147
CPCB22F9/082C22C38/34C22C38/002C22C38/001H01F1/147H01F1/14766B22F2009/0836B22F2009/0848B22F2009/0824B22F2009/0844
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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