Preparation method of metal soft magnetic powder core with low forming pressure and high production efficiency

A metal soft magnetic, production efficiency technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high cost and low efficiency, and achieve the effect of improving production efficiency, simple and easy operation, and improving performance
CN112652437APending Publication Date: 2021-04-13江苏瑞德磁性材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江苏瑞德磁性材料有限公司
Publication Date
2021-04-13

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Abstract

The invention relates to a preparation method of a metal soft magnetic powder core with low forming pressure and high production efficiency, and belongs to the technical field of preparation of metal soft magnetic powder cores. The preparation method comprises the following operation steps: (1) screening iron-based powder into three levels, and taking three kinds of iron-based powder according to the mass percent to obtain powder; (2) mixing the three kinds of powder to obtain mixed powder; (3) adding epoxy resin and zinc stearate into the mixed powder, and uniformly stirring to obtain blank powder; (4) performing extrusion processing on the blank powder in a screw extruder to obtain a hollow pipe, and cutting the hollow pipe into a magnet ring green body; and (5) baking the magnet ring green body in a box-type furnace to obtain a metal soft magnetic powder core; wherein the density of the metal soft magnetic powder core ranges from 5.78 g / cm<3> to 7.20 g / cm<3>, and the magnetic conductivity ranges from 48.0 to 49.5. The forming pressure of the metal soft magnetic powder core is remarkably reduced through the particle size ratio, so that the metal soft magnetic powder core can be formed in an extrusion and cutting mode, the cost is reduced, and the production efficiency is greatly improved.
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Description

technical field

[0001] The invention belongs to the technical field of preparation of metal soft magnetic powder cores, and in particular relates to a preparation method of metal soft magnetic powder cores with low forming pressure and high production efficiency. Background technique

[0002] At present, power electronic devices are rapidly developing toward miniaturization, high frequency, high power and high efficiency, which also puts forward higher requirements for soft magnetic materials. Among the traditional soft magnetic core materials, silicon steel sheets and amorphous soft magnetic alloys have low application frequency due to large eddy current loss and noise; ferrite cannot meet the needs of device miniaturization due to its low saturation magnetic induction; Nanocrystalline soft magnetic alloys are difficult to be widely used due to their high cost and very brittle materials. The metal soft magnetic powder core prepared by powder metallurgy process from ferroma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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