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Making method for soft magnetic alloy compound material with high magnetic conductivity

A technology of high magnetic permeability and soft magnetic alloy, which is applied in the direction of magnetic properties of inorganic materials, can solve the problems of low resistivity and limitations of metal soft magnetic alloys, and achieve improved magnetic shielding effects, high magnetic permeability, and improved high-frequency magnetic properties. Can effect

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

[0005] The common disadvantage of metal magnetic materials as anti-electromagnetic interference materials is that the resistivity of metal soft magnetic alloys is low, and the use thickness is limited by the skin depth. Reducing the material thickness can expand its application range in high frequency, but it is also limited by certain limit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Put the raw materials in the mass ratio: iron 80%, titanium 5%, silicon 9.6%, aluminum 5.4% into an intermediate frequency vacuum induction furnace with alumina as a crucible for melting, and vacuumize 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 drops, and then it is evacuated again to 10 -2 Above Pa, fill the furnace with high-purity argon until the pressure in the furnace is 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0018] 2) The smelted FeSiAlTi master alloy is put into the rapid quenching equipment, and the alloy ingot is quickly poured on the high-speed rotating roller after arc remelting under the protection of high-purity argon to obtain rapidly condensed flakes. The quenching speed is 15m / s;

[0019] 3) Put the FeSiAlTi flakes into a ball...

Embodiment 2

[0023] 1) The raw materials are melted in an intermediate frequency vacuum induction furnace with alumina as a crucible in a mass ratio of: iron 75%, titanium 10%, silicon 9.6%, aluminum 5.4%, and the vacuum is evacuated 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 drops, and then it is evacuated again to 10 -2 Above Pa, fill the furnace with high-purity argon until the pressure in the furnace is 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0024] 2) The smelted FeSiAlTi master alloy is put into the rapid quenching equipment, and the alloy ingot is quickly poured on the high-speed rotating roller after arc remelting under the protection of high-purity argon to obtain rapidly condensed flakes. The quenching speed is 27.5m / s;

[0025] 3) Put the FeSiAlTi flakes ...

Embodiment 3

[0029] 1) Put the raw materials in the mass ratio: 70% iron, 15% titanium, 9.6% silicon, and 5.4% aluminum for melting in an intermediate frequency vacuum induction furnace with alumina as the crucible, and vacuumize 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 drops, and then it is evacuated again to 10 -2 Above Pa, fill the furnace with high-purity argon until the pressure in the furnace is 0.5×10 5 Pa, high-power transmission to completely melt the charge, and then low-power refining for 10 minutes before pouring.

[0030] 2) The smelted FeSiAlTi master alloy is put into the rapid quenching equipment, and the alloy ingot is quickly poured on the high-speed rotating roller after arc remelting under the protection of high-purity argon to obtain a rapidly condensed thin strip. 20m / s;

[0031] 3) Put the FeSiAlTi flakes into a ball mill for fl...

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Abstract

The invention discloses a preparation method for high magnetic conductivity soft magnetic alloy composite materials, comprising the followings steps: firstly, ferrum, aluminum, silicon and titanium 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, flat processing is performed by adoption of the ball milling technology, and flat powder is obtained; fourthly, the flat powder is laid into a stainless steel tube which is then vacuumized and filled with inert protective gases, and then the stainless steel tube is laid into a tube furnace for heating and cooling along with the furnace; fifthly, the flat powder and binding agents are mixed and milled for processing the flaky high magnetic conductivity soft magnetic materials which are then laid into a heat treatment furnace for heating, heat preservation and vacuum cooling. The preparation method for the high magnetic conductivity soft magnetic alloy composite materials is simple in technology and suitable for large-scale mass production; a magnet has high magnetic conductivity; the magnetic shielding effect is greatly improved.

Description

technical field [0001] The invention relates to magnetic materials, in particular to a preparation method of a soft magnetic alloy composite material with high magnetic permeability. Background technique [0002] With the continuous development of the electronic communication industry and the popularization of electronic communication devices such as mobile phones and notebook computers, the impact of electromagnetic interference on the environment is increasing. The annual economic loss caused by electromagnetic pollution is as high as 500 million US dollars. The development of GHz frequency band Microwave anti-electromagnetic interference materials in the range have attracted more and more attention. At the same time, microwave absorbing materials are the basic materials for the development of high-tech military projects and the key to stealth technology. Whether it is for civil or military use, higher requirements are put forward for microwave anti-electromagnetic interfe...

Claims

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Application Information

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IPC IPC(8): H01F1/22C22C33/06B22D11/01B22F9/04
Inventor 严密许盼盼罗伟马天宇
Owner ZHEJIANG UNIV
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