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Silicon steel magnetic powder core and preparation method therefor

A magnetic powder core and silicon steel technology, which is applied in the field of metal magnetic powder cores, can solve problems such as unfavorable large-scale preparation, and achieve the effect of comprehensive utilization

Active Publication Date: 2017-12-01
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of this patent lies in the formation of the coating layer, and its disadvantage is that it needs to carry out the diffusion reaction under vacuum conditions, which is not conducive to large-scale preparation
[0008] To sum up, in the prior art, there is no silicon steel magnetic powder core and its preparation method that uses silicon steel waste as raw material, has excellent electromagnetic properties, and is suitable for industrial production.

Method used

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  • Silicon steel magnetic powder core and preparation method therefor
  • Silicon steel magnetic powder core and preparation method therefor
  • Silicon steel magnetic powder core and preparation method therefor

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with specific examples.

[0028] The silicon steel magnetic powder core provided by the present invention uses silicon steel sheet waste or other silicon steel materials as the main raw material, and adds a small amount of alloy elements as needed, and smelts to the following target composition range: C: ≤ 0.005wt%, Si: 0.30wt% ~ 6.50 wt%, Mn: ≤0.50wt%, P: ≤0.20wt%, S: ≤0.005wt%, Als: ≤1.5wt%, N: ≤0.005wt%, the rest are Fe and unavoidable impurities, and at the same time meet 1.0 wt%≤(Si+Als)≤7.5 wt%. Its average particle size is 70-100μm. After being processed into a ring, the magnetic induction intensity at 50Hz is B 5000 Greater than 500mT, high frequency iron loss P 0.1 / 20K It is 30-55w / kg.

[0029] The action mechanism of each element in the present invention is described below.

[0030] C: C is a harmful element, and its excessive content will deteriorate the magnetic properties. A...

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Abstract

The invention discloses a silicon steel magnetic powder core and a preparation method therefor. A silicon steel sheet waste material or other silicon steel materials are taken as the main raw materials, alloy elements are added according to needs, and the target components are smelted as follows: less than or equal to 0.005wt% of C, 0.30-6.50wt% of Si, less than or equal to 0.50wt% of Mn, less than or equal to 0.20wt% f P, less than or equal to 0.005wt% of S, less than or equal to 1.5wt% of Als, less than or equal to 0.005wt% of N, and the balance of Fe and inevitable impurities, wherein (Si+Als) is greater than or equal to 1.0wt% and less than or equal to 7.5wt%; and steps of powder making, passivating, coating, pressing and heat treatment are performed to prepare the silicon steel magnetic powder core. The silicon steel magnetic powder core with excellent electromagnetic performance is obtained by taking the silicon steel sheet waste material as the main raw material for atomization and powder making, adopting a silicon steel coating liquid as a coating agent, and adopting a powder metallurgy process, so that comprehensive utilization of resources can be realized.

Description

technical field [0001] The invention relates to a metal magnetic powder core, in particular to a silicon steel magnetic powder core and a preparation method thereof. Background technique [0002] Metal magnetic powder cores are widely used in PFC circuits and switching power supplies (SMPS), and are important materials for manufacturing electronic components such as online noise filters, high-frequency inductors, pulse transformers, flyback transformers, and solar inverters. [0003] The traditional production method of metal magnetic powder cores is a soft magnetic product formed by coating metal soft magnetic powder particles with insulating medium, pressing and heat treatment. Because the magnetic particles are small, they have high resistivity after coating. On the one hand, the eddy current loss in the high-frequency magnetic field is small, and on the other hand, the magnetic permeability is not high due to the particle gap. The commonly used magnetic powder cores mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/24C22C38/02C22C38/04C22C38/06B22F1/00C21D1/26C21D1/74
CPCH01F1/14766H01F1/24C21D1/26C21D1/74C22C38/001C22C38/004C22C38/02C22C38/04C22C38/06B22F1/145Y02P10/20
Inventor 冯大军肖一坦焦立新康凌晨韩斌胡守天党宁员石文敏彭明新
Owner 武汉钢铁有限公司
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