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Iron-based nanocrystalline soft magnetic alloy with electromagnetic interference resistance and preparation method thereof

An anti-electromagnetic interference, iron-based nanocrystal technology, applied in the direction of circuits, magnetic materials, electrical components, etc., can solve problems such as difficulty in meeting large-scale industrial production, easy blockage of nozzles, no production and sales, etc., and achieve excellent processing performance , Large outlet and high magnetic permeability

Inactive Publication Date: 2010-05-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The induction spray quenching quenching method uses less material each time, and there is a technical problem that the nozzle is easy to block
At present, this type of rapid quenching furnace is only used in the preparation of a small number of samples in the laboratory. There is no production and sales of induction spray quenching quenching furnaces that can be used for industrial production in China, and it is difficult to meet large-scale industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Fe by weight percentage 82 Si 10 Al 4 Ni 3.5 Ti 0.5 Weigh Fe with a purity of 99.8%, Si with a purity of 99.9%, Al with a purity of 99.9%, Ni with a purity of 99.9% and Ti with a purity of 99.9%, and put the weighed raw materials of the target components into an alumina crucible In the intermediate frequency vacuum induction melting furnace, vacuum to 10 -1 Pa, and then send electricity to preheat the charge to remove the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum degree in the furnace decreases, and then vacuumizes again to 10 -2 Above Pa, fill with high-purity argon gas (the purity of high-purity argon gas is 99.9999%) until the pressure in the furnace is 0.5×10 5 Pa, the alloy is heated and melted by the action of electromagnetic field and eddy current, and the alloy is repeatedly smelted 4 times to obtain Fe with uniform composition 82 Si 10 Al 4 Ni 3.5 Ti 0.5 master alloy.

[0021] 2) Put the smelted Fe 82 Si ...

Embodiment 2

[0026] 1) Fe by weight percentage 84 Si 8 Al 4 Ni 3.5 Cu 0.5 Weigh Fe with a purity of 99.8%, Si with a purity of 99.9%, Al with a purity of 99.9%, Ni with a purity of 99.9%, and Cu with a purity of 99.9%. In the intermediate frequency vacuum induction melting furnace, vacuum to 10 -1 Pa, and then send electricity to preheat the charge to remove the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum degree in the furnace decreases, and then vacuumizes again to 10 -2 Above Pa, fill with high-purity argon gas (the purity of high-purity argon gas is 99.9999%) until the pressure in the furnace is 0.5×10 5 Pa, the alloy is heated and melted by the action of electromagnetic field and eddy current, and the alloy is repeatedly smelted 5 times to obtain Fe with uniform composition 84 Si 8 Al 4 Ni 3.5 Cu 0.5 master alloy.

[0027] 2) Put the smelted Fe 84 Si 8 Al 4 Ni 3.5 Cu 0.5 The mother alloy is placed in an arc overflow rapid quenching...

Embodiment 3

[0032] 1) Fe by weight percentage 88 Si 6 Al 2 Ni 3.5 Mo 0.5 Weigh Fe with a purity of 99.8%, Si with a purity of 99.9%, Al with a purity of 99.9%, Ni with a purity of 99.9% and Mo with a purity of 99.9%, and put the weighed raw materials of the target components into an alumina crucible In the intermediate frequency vacuum induction melting furnace, vacuum to 10 -1 Pa, and then send electricity to preheat the charge to remove the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum degree in the furnace decreases, and then vacuumizes again to 10 -2 Above Pa, fill with high-purity argon gas (the purity of high-purity argon gas is 99.9999%) until the pressure in the furnace is 0.5×10 5 Pa, the alloy is heated and melted by the action of electromagnetic field and eddy current, and the alloy is repeatedly smelted 6 times to obtain Fe with uniform composition 88 Si 6 Al 2 Ni 3.5 Mo 0.5 master alloy.

[0033] 2) Put the smelted Fe 88 Si 6 ...

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Abstract

The invention discloses an iron-based nanocrystalline soft magnetic alloy with electromagnetic interference resistance and a preparation method thereof. The general formula of the iron-based nanocrystalline soft magnetic alloy with electromagnetic interference resistance is Fe100-x-y-z-wSixAlYNizMw, wherein M is selected from at least one of Mo, Cu, Cr, Nb, Ti and Zr, x, y, z and w are respectively used as the weight percents of Si, Al, Ni and M, 100-x-y-z-w is the weight percent of Fe, x is not less than 2 and not more than 10, y not less than 2 and not more than 8, z is not less than 1 and not more than 5 and w is not less than 0.5 and not more than 1. Pure metal raw materials are blended according to the general formula and placed in a vacuum induction furnace for smelting to obtain a master alloy; then the master alloy is smelted by an electric arc overflow type rapid quenching furnace and quickly and continuously cast to the surface of a chilling copper roller to obtain thin strips or sheets which are subject to ball milling flattening treatment to obtain flattening powder; and finally mixing and processing the flattening powder and a caking agent into a sheet-shaped flexible material for resisting electromagnetic interference. The invention has controllable process parameters and is suitable for quick and continuous production of industrial scale; and an obtained magnet has extremely-high magnetic conductivity and the magnet shielding effect is improved.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to an anti-electromagnetic interference iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] At present, with the wide application and increasing popularity of electronic power systems such as various electronic devices, television networks, program-controlled switches, mobile communication machines, and office automation, the problem of electromagnetic pollution has gradually become a major concern for people. Environmental pollution. Electromagnetic interference (EMI) can be seen everywhere. It refers to the interference of unwanted electromagnetic signals or noises generated by electronic devices such as computers and mobile phones during use to effective electromagnetic signals. In today's electronic information age, with the rapid development of information highways, satellite communications, mobile communications, com...

Claims

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Application Information

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IPC IPC(8): H01F1/147C22C38/08C22C38/12C22C38/14C22C38/16C22C38/40C22C38/42C22C38/44C22C38/48C22C38/50C22C33/04B22D11/06B22F9/04
Inventor 严密陶姗马天宇许盼盼
Owner ZHEJIANG UNIV
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