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Method for preparing anti-corrosion iron-silicon-based magnetic core

A corrosion-resistant and iron-silicon technology, which is applied in the field of preparation of corrosion-resistant iron-silicon-based magnetic cores, can solve the problems of affecting magnetic properties, easy corrosion, and easy rusting of iron-silicon-based soft magnetic materials, so as to improve hardness and corrosion resistance Performance, the effect of improving the anti-magnetic saturation performance

Active Publication Date: 2015-03-25
HAIMEN BIWEI INTPROP SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, iron-silicon-based soft magnetic materials are prone to rust and corrosion in humid environments. Once corroded, their magnetic properties will be greatly affected, thus limiting the application of iron-silicon-based magnetic cores.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The magnetic core of the present embodiment is made of the alloy of following atomic ratio: (Fe 0.66 Al 0.25 Cr 0.09 ) 0.82 (Si 0.85 Nb 0.15 ) 0.16 PR 0.02 .

[0018] Raw materials were prepared according to the above atomic ratio, and iron powder, aluminum powder, silicon powder, chromium powder, niobium powder and praseodymium powder were weighed with a purity greater than 99.8%.

[0019] The alloy is smelted in a vacuum induction furnace. The feeding sequence is to add Fe, Cr, Nb and deoxidize first. After the material is melted, add Al, and finally add Si and Pr when adjusting the composition. The whole process is repeatedly refined for 3 times under the protection of argon atmosphere. After -5 times, purify the alloy liquid by blowing argon, start casting when the temperature reaches 1550°C and the vacuum degree is <1.5Pa, cover and seal the furnace cover, send the argon gas to protect the casting slab, and obtain the alloy ingot after cooling with the furna...

Embodiment 2

[0023] The magnetic core of the present embodiment is made of the alloy of following atomic ratio: (Fe 0.63 Al 0.28 Cr 0.09 ) 0.79 (Si 0.75 Nb 0.25 ) 0.18 PR 0.03 .

[0024] Raw materials were prepared according to the above atomic ratio, and iron powder, aluminum powder, silicon powder, chromium powder, niobium powder and praseodymium powder were weighed with a purity greater than 99.8%.

[0025] The alloy is smelted in a vacuum induction furnace. The order of feeding is to add Fe, Cr, Nb and deoxidize first. After the material is melted, add Al, and finally add Si and Pr when adjusting the composition. The whole process is under the protection of argon atmosphere and refined repeatedly for 5 After the second time, purify the alloy liquid by blowing argon, start casting when the temperature reaches 1600°C and the vacuum degree is less than 1.5Pa, cover and seal the furnace cover, send argon gas to protect the casting slab, and obtain the alloy ingot after cooling with ...

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Abstract

The invention relates to a method for preparing an anti-corrosion iron-silicon-based magnetic core. The method is characterized in that a soft magnetic material is composed of alloy (Fel-x-yAlxCry)1-a-b(Sil-zNbz)aPrb according to the atom ratio, wherein x ranges from 0.25 to 0.28, y ranges from 0.07 to 0.09, z ranges from 0.15 to 0.25, a ranges from 0.16 to 0.18, and b ranges from 0.02 to 0.03; the method includes the first step of material preparing, the second step of alloy casting, the third step of alloy belt material preparing, and fourth step of thermal processing. Iron alloy is adopted as a main material for the magnetic core prepared through the method, silicon and niobium are doped, and therefore the magnetic saturation resistance and performance of the material are improved; Cr and the rare earth element Pr are doped, and the hardness and corrosion resistance of the material are improved. Thus, the material is suitable for working under various high-strength and damp severe working environments.

Description

technical field [0001] The invention relates to a preparation method of a corrosion-resistant iron-silicon-based magnetic core. Background technique [0002] With the rapid development of science and technology in recent years, the requirements for energy saving, emission reduction, and pollution reduction have been put forward to promote the development of the electronics industry. The control parts of various electrical appliances must be designed in the direction of high frequency, so various switching power supplies must be used. A kind of soft magnetic material is used to make the inductance core, and it is ideal to use powdered iron core in the inductance core. This powdered iron core is used for AC inductance, output inductance, line filter, power factor correction circuit, etc. For high frequencies ranging from tens to hundreds of KHz. [0003] After the advent of iron-silicon-based nanocrystalline soft magnetic materials, due to their high magnetic permeability, lo...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/147C22C38/26
Inventor 陈红
Owner HAIMEN BIWEI INTPROP SERVICE CO LTD
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