Making method of iron-silicon material and mu35 iron-silicon magnetic powder core

A manufacturing method and technology of magnetic powder cores, applied in the direction of the magnetism of inorganic materials, can solve the problems of complex procedures and high energy consumption

Inactive Publication Date: 2014-02-19
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 μ35 iron-silicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ35 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. Milling: After the alloy is smelted, it is directly sprayed with nitrogen to make milling powder, and the powder is annealed after passing through a 200-mesh sieve;

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

Embodiment 2

[0024] Implementation 2. A manufacturing method of ferrosilicon material and μ35 ferrosilicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ35 iron-silicon magnetic powder core is a binary system iron-silicon alloy and certain trace elements are added, silicon is 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. Milling: After the alloy is smelted, it is directly sprayed with nitrogen to make milling powder, and the powder is annealed after passing through a 200-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 μ35 iron-silicon magnetic powder core. The specific method is as follows: the composition of the iron-silicon material and μ35 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. Milling: After the alloy is smelted, it is directly sprayed with nitrogen to make milling powder, and the powder is annealed after passing through a 200-mesh sieve;

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

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Abstract

The invention discloses a making method of an iron-silicon material and a mu35 iron-silicon magnetic powder core. The components of the iron-silicon material and the mu35 iron-silicon magnetic powder core comprise a binary iron-silicon alloy, certain trace elements, 5-6% of silicon, and the balance iron. The making method comprises the following steps: 1, alloy smelting: carrying out alloy smelting in a magnesium oxide crucible open type intermediate-frequency induction furnace; 2, powdery preparation: directly carrying out nitrogen spraying after the alloy smelting to prepare powder; 3, powder reduction: reducing by adopting nitrogen; 4, powder passivation: adding 3-5wt% of an analytically pure phosphoric acid solution to the iron-silicon powder; 5, insulation cladding: sequentially adding 1.5-3.5wt% of a silicon resin bonding agent and 0.5-1wt% of lubrication powder into air-dried powder; 6, compression molding: completing powder molding under a pressure of 16-22t / cm<2>; 7, heat treatment: annealing at 500+ / -30DEG C for about 1h; and 8, surface coating: spray-coating the external surface of the product obtained in step 7 with a layer of an epoxy resin paint.

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 μ35 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 overcome the deficiencies of the prior art and provide a simple process, greatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02B22F1/00H01F1/14
Inventor 周勇明应冬苟
Owner SICHUAN DONGGE TECH
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