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Preparation method of high-performance FeSi soft magnetic powder core

A soft magnetic powder core, high-performance technology, applied in the field of powder metallurgy, can solve the problems of reduced processing performance, increased brittleness of Fe-Si alloy, difficult preparation of Fe-Si soft magnetic powder core, etc., achieves good comprehensive performance and improves magnetic performance. Effect

Inactive Publication Date: 2018-04-13
SHAANXI SHENGMAI PETROLEUM
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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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Embodiment Construction

[0019] A preparation method of 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) The Fe-6.5Si powder was first heat-treated in a hydrogen atmosphere, and then the lubricant and inorganic binder were weighed and mechanically mixed in a ball mill for 8 hours;

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

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

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Abstract

The invention relates to the technical field of powder metallurgy, in particular to a preparation method of a high-performance FeSi soft magnetic powder core. The preparation method of the high-performance FeSi soft magnetic powder core comprises the following steps of raw material preparation, powder pre-processing, temperature pressure formation and blank thermal processing. Fe-6.5Si powder is employed, and the Fe-Si soft magnetic powder core is prepared by a powder metallurgy method under the condition of relatively high Si content. The formation difficulty of the Fe-Si powder with high Sicontent is reduced by introducing a temperature pressure process to substitute a traditional press process, silicate and a multi-component oxide are used as a composite inorganic binding agent to substitute a traditional and single inorganic binding agent, so that the magnetic performance of the magnetic powder core is improved, and the soft magnetic powder core with favorable comprehensive performance is prepared.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a preparation method of a high-performance FeSi soft magnetic powder core. Background technique [0002] The development of modern science and technology has made magnetic materials widely used, and magnetic materials and components are widely used in electronic products, communication equipment, computers and their peripheral equipment, instruments 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 factor. Fe-Si alloy is a kind of soft magnetic material with excellent performance, which is an important material for the manufacture of iron cores of motors, transformers and ballasts, as well as various electrical components, and the market demand is increasing. [0003] Fo...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/147B22F1/00B22F3/02
CPCH01F1/14766H01F41/0246B22F3/02B22F2998/10B22F2999/00B22F1/105B22F1/142B22F2201/013B22F3/1007B22F2009/043
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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