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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

Pending Publication Date: 2021-04-13
江苏瑞德磁性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high cost and low efficiency in the preparation of existing metal soft magnetic powder cores, the present invention provides a method for preparing metal soft magnetic powder cores with low forming pressure and high production efficiency

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of preparation operation steps of the metal soft magnetic powder core with low forming pressure and high production efficiency are as follows:

[0030] Step (1) Preparation of powder

[0031] Sieve the iron-nickel powder into three grades, the first-grade iron-nickel powder passes through a 80-120 mesh sieve, the second-grade iron-nickel powder passes through a 350-450 mesh sieve, and the third-grade iron-nickel powder passes through a 2000-12500 mesh sieve;

[0032] Take 110g of first-grade iron-nickel powder, 40g of second-grade iron-nickel powder and 50g of third-grade iron-nickel powder to obtain 200g of powder.

[0033] Step (2) Mix the powder

[0034] Mix the first-grade iron-nickel powder and the second-grade iron-nickel powder in a V-shaped mixer for 20 minutes, add the third-grade iron-nickel powder, and continue mixing for 30 minutes to obtain a mixed powder.

[0035] Step (3) Prepare base powder

[0036] Add 12g of epoxy resin and 0.8g of zinc stear...

Embodiment 2

[0042] A kind of preparation operation steps of the metal soft magnetic powder core with low forming pressure and high production efficiency are as follows:

[0043] Step (1) Preparation of powder

[0044] Sieve the iron-silicon powder into three grades, the first-grade iron-silicon powder passes through a 100-180 mesh sieve, the second-grade iron-silicon powder passes through a 325-350 mesh sieve, and the third-grade iron-silicon powder passes through a 625-mesh 5000 mesh sieve;

[0045] Take 120g of first-grade iron-silicon powder, 20g of second-grade iron-silicon powder and 60g of third-grade iron-silicon powder to obtain 200g of powder.

[0046] Step (2) Mix the powder

[0047] Mix the first-grade iron-silicon powder and the second-grade iron-silicon powder in a V-shaped mixer for 20 minutes, add the third-grade iron-silicon powder, and continue mixing for 35 minutes to obtain a mixed powder.

[0048] Step (3) Prepare base powder

[0049] Add 16g of epoxy resin and 0.8g...

Embodiment 3

[0055] A kind of preparation operation steps of the metal soft magnetic powder core with low forming pressure and high production efficiency are as follows:

[0056] Step (1) Preparation of powder

[0057] Sieve the sendust powder into two grades, the first grade sendust powder passes through a 150 mesh to 200 mesh sieve, the second grade sendust powder passes through a 350 mesh to 400 mesh sieve, and the third grade powder is carbonyl iron powder and passes through a 2500 mesh sieve. Mesh ~ 5000 mesh sieve;

[0058]Take 140g of primary sendust powder, 30g of secondary sendust powder and 30g of tertiary carbonyl iron powder to obtain 200g of powder.

[0059] Step (2) Mix the powder

[0060] Mix the first-grade sendust powder and the second-grade sendust powder in a V-type mixer for 30 minutes, add the third-grade carbonyl iron powder, and continue mixing for 40 minutes to obtain a mixed powder.

[0061] Step (3) Prepare base powder

[0062] 16g of epoxy resin and 1.0g of z...

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153
CPCH01F1/1535
Inventor 张学斌张华苏海林邹中秋仝西川马剑张博玮都有为
Owner 江苏瑞德磁性材料有限公司
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