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Method for manufacturing iron base alloy electromagnetic-interference-resistance

An anti-electromagnetic interference, iron-based alloy technology, applied in the field of magnetic materials, can solve the problems of unfavorable industrial cost control, difficult and precise control of components, long time, etc., to achieve the effects of good crystallinity, excellent performance, and reduced waste.

Inactive Publication Date: 2008-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A comprehensive analysis of previous studies shows that the Fe-based alloy used for anti-electromagnetic interference has a nanocrystalline structure. The preparation methods mainly include atomization and mechanical alloying. The metal powder prepared by the atomization method has high production efficiency, It has a series of advantages such as uniform micro-powder particles and low production cost. Its particle shape can also be adjusted by adjusting the spray angle θ of the atomizing nozzle, but its composition is not easy to accurately control
Mechanical alloying is a common method to prepare nanocrystalline alloys, but the internal stress generated during the ball milling process is too large, which must be eliminated by subsequent annealing processes, and the energy of alloying comes from the mechanical shear force when the particles collide with each other. The chemicalization process often takes a long time, which is not conducive to the control of industrial costs

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: 85% iron, 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 ~10 -3 Pa, filled 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) Put the smelted master alloy into the rapid quenching equipment, and the alloy ingot is remelted under the protection of high-purity argon, and then quickly poured onto the high-speed rotating roller to obtain a rapidly condensed thin strip. 15m / s;

[0019] 3) put the strip into a ball mill for flattening treatment to obtain a flat powder,...

Embodiment 2

[0023] 1) Put the raw materials in the mass ratio: iron 87%, silicon 8.6%, aluminum 4.4% 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.

[0024] 2) The smelted master alloy is put into the rapid quenching equipment, and the alloy ingot is remelted under the protection of high-purity argon, and then quickly poured onto the high-speed rotating roller to obtain a rapidly condensed thin strip. The quenching speed is 27.5m / s;

[0025] 3) Put the strip into a ball mill for flattening tr...

Embodiment 3

[0029] 1) Put the raw materials in the mass ratio: 82% iron, 10% silicon, and 8% aluminum for melting in an intermediate frequency vacuum induction furnace with alumina as the crucible, and vacuumize to 10 -1Pa, 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 master alloy is put into the rapid quenching equipment, and the alloy ingot is remelted under the protection of high-purity argon, and then quickly poured onto the high-speed rotating roller to obtain a rapidly condensed thin strip with a quenching speed of 15m / s;

[0031] 3) Put the strip or sheet into a ball mill for fla...

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PUM

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Abstract

The invention discloses a process for preparing anti-electromagnetic wave interference material of ferrous alloy, which comprises steps of 1) placing melted ferrous master alloy in a rapidly quench device, quickly pouring cast ingots of the ferrous master alloy under the protection of inert gas to a roller rotating at high speed after remelting to obtain bands rapidly condensed, 2) flattening the bands via ball-milling process to obtain flat powder, 3) placing the flat powder into a stainless steel tube, after vacuum-pumping and charging protective inert gas, placing the stainless steel tube into a tube furnace for heating and heat-insulating, then cooling along with the furnace, 4) mixing and processing the flat powder and binding agent into flaky flexible anti-electromagnetic interference material. The invention improves the technique of preparing the anti-electromagnetic interference material, processing parameter is easy to control, large-scale mass production is suitable, magnetic bodies have high magnetic permeability, and magnetic shielding effect is largely increased.

Description

technical field [0001] The invention relates to a magnetic material, in particular to a method for manufacturing an iron-based alloy anti-electromagnetic wave interference material. Background technique [0002] Electromagnetic interference (EMI) is the interference of effective electromagnetic signals by unwanted electromagnetic signals or noise generated by electronic equipment such as computers and mobile phones during use. With the increasing popularity of various electronic devices, TV networks, program-controlled switches, mobile communication machines, and office automation, electromagnetic interference has increasingly become a major environmental pollution that people worry about, and its impact on military and civilian electronic information is becoming more and more serious. , has caused great harm to the public environment and personal safety, as well as military confidentiality and security, and with the development of many active networks in the direction of mi...

Claims

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Application Information

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IPC IPC(8): H01F1/08C22C33/06B22D11/01B22F9/04
Inventor 严密许盼盼罗伟马天宇
Owner ZHEJIANG UNIV
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