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Preparation method for high-performance Fe-Si soft magnetic powder core

A soft magnetic powder core, high-performance technology, applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problem of reduced processing performance, increased brittleness of Fe-Si alloys, and difficulties in the preparation of Fe-Si soft magnetic powder cores and other issues to achieve the effect of improving magnetic properties and good comprehensive performance

Inactive Publication Date: 2015-06-03
邹和平
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AI Technical Summary

Problems solved by technology

However, the increase of Si content will increase the brittleness of Fe-Si alloy and reduce its processing performance. Therefore, in general Fe-Si soft magnetic materials, the Si content is less than 5%.
On the other hand, the preparation of Fe-Si soft magnetic powder cores with high Si content is difficult

Method used

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Experimental program
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Embodiment Construction

[0019] A preparation method for a high-performance FeSi soft magnetic powder core, comprising the following steps:

[0020] Step 1: Raw material: Fe-6.5Si powder, particle size is 154um, its mass fraction is about w(Si)6.5%, w(p)≤0.01, w(0)≤0.04%, w(S)≤0.01 %, w(C)≤0.02%, the balance is Fe; inorganic binder: silicate and multi-component mixed oxide with a particle size of 154um;

[0021] Step 2: Pretreatment of powder:

[0022] (1) Fe-6.5Si powder is firstly heat-treated in a hydrogen atmosphere, then the lubricant and inorganic binder are weighed, and the powder is mechanically mixed in a ball mill for 8 hours;

[0023] (2) Pour the above mixed powder into a container, dry at 80°C for 2 hours to obtain the mixed powder required for warm pressing;

[0024] Step 3: warm pressing forming: weigh the mixed powder, put it into a preheated warm pressing mold at a certain temperature and pressure for pressing, and obtain a disc-shaped green compact with a diameter of 20 mm afte...

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Abstract

The invention relates to the technical field of powder metallurgy, in particular to a preparation method for a high-performance Fe-Si soft magnetic powder core. The preparation method includes the steps of raw material preparation, powder preprocessing, warm-pressing forming and blank heat treatment. According to the preparation method, Fe-6.5Si powder is adopted, and the Fe-Si soft magnetic powder core is prepared according to a powder metallurgy method under the condition of high content of Si. By a warm-pressing process introduced to substitute for a conventional pressing process, forming difficulty of high-Si-content Fe-Si powder is lowered; silicates and multicomponent oxides serve as a composite inorganic binder to substitute for a conventional single inorganic binder so as to improve magnetic performance of the magnetic powder core and prepare the soft magnetic powder core with good comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a method for preparing a high-performance FeSi soft magnetic powder core. Background technique [0002] The development of modern science and technology has made magnetic materials widely used. Magnetic materials and components are widely used in electronic products, communication equipment, computers and their peripheral equipment, instruments and meters, and modern military equipment. With the development of electronic devices towards miniaturization, high density and high power, magnetic materials and devices are required to have good electromagnetic properties, mechanical properties and high quality factors. Fe-Si alloy is a kind of soft magnetic material with excellent performance. It is an important material for manufacturing motors, transformers, ballast cores and various electrical components, and the market demand is constantly increasing. [0003] For Fe-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/02C21D1/00H01F41/02H01F1/33
Inventor 邹和平
Owner 邹和平
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