Manufacturing method of iron-silicon material and iron-silicon magnetic powder core having permeability mu of 55

A manufacturing method and technology of magnetic powder cores, which are applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve problems such as complex procedures and high energy consumption

Inactive Publication Date: 2014-02-12
SICHUAN DONGGE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the existing manufacturing method has the problems of complex process and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Implementation 1. A manufacturing method of an iron-silicon material and a μ55 iron-silicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ55 iron-silicon magnetic powder core is a binary system iron-silicon alloy and certain trace elements are added, silicon is 6%, and the balance is iron, including alloy smelting, milling, powder Reduction, powder passivation, insulation coating, molding, heat treatment, surface coating;

[0016] a. Alloy smelting: alloy smelting is carried out in a magnesia crucible open-type intermediate frequency induction furnace, the melting temperature is above 1400°C, and the alloy melting time is above 50 minutes;

[0017] b. Powder making: After the alloy is smelted, nitrogen spraying is carried out directly to make powder, and the powder is annealed after passing through a 100-mesh sieve;

[0018] c. Powder reduction: Nitrogen reduction is used, and the nitrogen dew point is cont...

Embodiment 2

[0024] Implementation 2. A manufacturing method of ferrosilicon material and μ55 ferrosilicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ55 iron-silicon magnetic powder core is a binary system iron-silicon alloy and certain trace elements are added, silicon 5%, and the balance is iron, including alloy smelting, milling, powder Reduction, powder passivation, insulation coating, molding, heat treatment, surface coating;

[0025] a. Alloy smelting: alloy smelting is carried out in a magnesia crucible open-type intermediate frequency induction furnace, the melting temperature is above 1400°C, and the alloy melting time is above 50 minutes;

[0026] b. Powder making: After the alloy is smelted, nitrogen spraying is carried out directly to make powder, and the powder is annealed after passing through a 100-mesh sieve;

[0027] c. Powder reduction: Nitrogen reduction is used, and the nitrogen dew point is controlled b...

Embodiment 3

[0033] Implementation 3. A manufacturing method of an iron-silicon material and a μ55 iron-silicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ55 iron-silicon magnetic powder core is a binary system iron-silicon alloy and certain trace elements are added, silicon is 5.5%, and the balance is iron, including alloy smelting, milling, powder Reduction, powder passivation, insulation coating, molding, heat treatment, surface coating;

[0034] a. Alloy smelting: alloy smelting is carried out in a magnesia crucible open-type intermediate frequency induction furnace, the melting temperature is above 1400°C, and the alloy melting time is above 50 minutes;

[0035] b. Powder making: After the alloy is smelted, nitrogen spraying is carried out directly to make powder, and the powder is annealed after passing through a 100-mesh sieve;

[0036] c. Powder reduction: Nitrogen reduction is used, and the nitrogen dew point is co...

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Abstract

The invention discloses a manufacturing method of an iron-silicon material and an iron-silicon magnetic powder core having the permeability mu of 55. The ingredients of the iron-silicon material and the iron--silicon magnetic powder core having the permeability mu of 55 comprise a binary system iron-silicon alloy and certain added microelements including 5%-6% of silicon and the balance of iron. The manufacturing method comprises the steps as follows: a, alloy melting: alloy melting is performed in a magnesia crucible open type medium-frequency induction furnace; b, powder manufacturing: nitrogen spraying is directly performed for powder manufacturing after alloy melting; c, powder reduction, nitrogen is adopted for reduction; d, powder passivation: 3%-5% of an analytically pure grade phosphoric acid solution is added in the iron-silicon powder according to a weight ratio; e, insulation coating: 1.5%-3.5% of a silicon resin adhesive and 0.5%-1% of a powdered lubricant are added in the aired powder according to a weight ratio; f, compression molding: powder forming is performed under the pressure of 16-22 tons per square centimeter; g, heat treatment: annealing is performed for about one hour at a temperature of 500+/-30 DEG C; and h, surface coating: the surface of a product is uniformly sprayed with an epoxy resin paint layer.

Description

technical field [0001] The invention relates to a method for manufacturing an alloy material, in particular to a method for manufacturing an iron-silicon material and a μ55 iron-silicon magnetic powder core. Background technique [0002] As we all know, the magnetic powder core made of iron-silicon material has the characteristics of high resistivity and low eddy current loss, and is suitable for higher frequency applications. However, since different users have different requirements on the magnetic permeability of magnetic powder cores made of iron-silicon materials, it is necessary to provide iron-silicon magnetic powder cores with different magnetic permeability according to user requirements. At the same time, the existing manufacturing method has the problems of complicated process and high energy consumption. Contents of the invention [0003] The purpose of the present invention is to provide a simple process, greatly reduced energy consumption and has very excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/02B22F3/02B22F9/08B22F3/24H01F1/147H01F41/02
Inventor 周勇明应冬苟
Owner SICHUAN DONGGE TECH
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