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Making method for electromagnetic wave interference resisting iron ,silicon, aluminum and nickel alloy

An anti-electromagnetic wave, SensiAlNi technology, applied in the direction of circuits, magnetic materials, electrical components, etc., can solve the problems of brittle texture and difficult cold working, and achieve the effects of improving magnetic permeability, saving production costs, and saving costs

Inactive Publication Date: 2008-08-06
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its raw materials are cheap and easy to get, and it has high magnetic permeability like Permalloy, and its saturation magnetic induction is B s , higher resistivity ρ, this alloy is very suitable as a magnetic head material, but its biggest disadvantage is that its texture is too brittle and not easy to cold work, which limits its popularization and application for a long time

Method used

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  • Making method for electromagnetic wave interference resisting iron ,silicon, aluminum and nickel alloy
  • Making method for electromagnetic wave interference resisting iron ,silicon, aluminum and nickel alloy
  • Making method for electromagnetic wave interference resisting iron ,silicon, aluminum and nickel alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Put the raw materials in a mass ratio: 85.5% of iron, 4% of silicon, 5% of aluminum, and 5.5% of nickel, into an intermediate frequency vacuum induction furnace with alumina as a crucible, and evacuated to 10 -1 Pa, and then send electricity to preheat the charge to eliminate the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum in the furnace drops, and then evacuates to 10 -2 Above Pa, fill with high-purity argon gas to the furnace pressure of 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0025] 2) The smelted FeSiAlNi master alloy is put into the rapid quenching equipment, the alloy ingot is remelted by arc under the protection of high-purity argon gas, and then quickly poured onto the high-speed rotating roller to obtain fast-condensing flakes. The quenching rate is 15m / s;

[0026] 3) Put the FeSiAlNi flakes into a ball mill for ball milling and flatteni...

Embodiment 2

[0030] 1) Put the raw materials in a mass ratio of 84% iron, 8% silicon, 4.5% aluminum, and 3.5% nickel into an intermediate frequency vacuum induction furnace with alumina as a crucible, and evacuated to 10 -1 Pa, and then send electricity to preheat the charge to eliminate the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum in the furnace drops, and then evacuates to 10 -2 Above Pa, fill with high-purity argon gas to the furnace pressure of 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0031] 2) The smelted FeSiAlNi master alloy is put into the rapid quenching equipment, and the alloy ingot is remelted under the protection of high-purity argon gas and then quickly poured onto the high-speed rotating roller to obtain a rapidly condensing thin strip. 25m / s;

[0032] 3) Put the FeSiAlNi thin strip into a ball mill for ball milling and flattening to obtain a flat powd...

Embodiment 3

[0036] 1) Put the raw materials in a mass ratio of 90% iron, 6% silicon, 2.5% aluminum, and 1.5% nickel into an intermediate frequency vacuum induction furnace using alumina as a crucible, and evacuated to 10 -1 Pa, and then send electricity to preheat the charge to eliminate the adsorbed gas, moisture and organic matter of the charge. At this time, the vacuum in the furnace drops, and then evacuates to 10 -2Above Pa, fill with high-purity argon gas to the furnace pressure of 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0037] 2) The smelted FeSiAlNi master alloy is put into the rapid quenching equipment, and the alloy ingot is remelted under the protection of high-purity argon gas and then quickly poured onto the high-speed rotating roller to obtain a rapidly condensing thin strip. 20m / s;

[0038] 3) Put the FeSiAlNi thin strip into a ball mill for ball milling and flattening to obtain a flat powd...

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Abstract

The invention discloses a preparation method for electromagnetic wave interference resistant iron silicon aluminum nickel alloys. The invention comprises the following steps: firstly, ferrum, aluminum, silicon and nickel with a purity more than 99.9 weight percent are taken as raw materials and laid into a medium frequency vacuum induction furnace for smelting, and a master alloy is obtained; secondly, the master alloy after smelting is laid into a quick quenching device; an alloy ingot casting is quickly poured on a water-cooling roll wheel which rotates at high speed after arc remelting under the protection of high purity inert gases, and a quickly condensed sheet band or a quickly condensed sheet is obtained; thirdly, the sheet band or the sheet is laid into a ball mill for ball milling flat processing, and flat powder is obtained; fourthly, the flat powder is laid into a stainless steel tube which is then vacuumized and filled with high purity inert gases for protection, and then the stainless steel tube is laid into a tube furnace for heating, heat preservation and cooling along with the furnace; fifthly, the flat powder and binding agents are mixed and milled for processing the sheet. The preparation method for the electromagnetic wave interference resistant iron silicon aluminum nickel alloys adds adequate nickel into Sendust alloys, thereby the processability of the alloys is improved; the ball milling time is reduced; the cost of industrial production is saved; simultaneously the magnetic conductivity can be improved and the magnetic shielding effect can be improved.

Description

Technical field [0001] The invention relates to a magnetic material, in particular to a preparation method of anti-electromagnetic wave interference iron-silicon-aluminium-nickel alloy. Background technique [0002] The harm of electromagnetic interference (EMI) to the public environment and personal safety has been recognized by countries all over the world. Europe has implemented European electromagnetic compatibility standards (EN) since January 1996, indicating that electrical products entering the European market must comply with RFI / EMI and Immunity requirements. The electromagnetic compatibility issue involves a wide range, and its core is to try to reduce the electromagnetic interference generated by itself and improve the ability to resist electromagnetic interference. At present, there are three general electromagnetic compatibility design technologies in electronic equipment and systems: grounding, shielding, and filtering, which are usually referred to as the three ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/047H01F1/08C22C33/06B22D11/01B22F9/04B22F1/00
Inventor 严密许盼盼罗伟马天宇
Owner ZHEJIANG UNIV
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