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Fast microwave crystallizing process for preparing nanometer crystalline iron-base soft magnetic alloy

A technology of iron-based nanocrystals and soft magnetic alloys, applied in magnetic materials, manufacturing tools, magnetic objects, etc., can solve the problems of harmful magnetic properties, complicated processes, and few applications of metal alloys

Inactive Publication Date: 2007-08-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are more likely to cause the grain size of the precipitated phase to be too large, and to generate Fe-B phases that are harmful to magnetic properties, and the process is more complicated.
Microwave field is a special high-frequency electromagnetic field, and its frequency can generally reach 2.45GHz. However, microwave heating is currently aimed at the synthesis of ceramics or inorganic materials, and is rarely used in the preparation of metal alloys.

Method used

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  • Fast microwave crystallizing process for preparing nanometer crystalline iron-base soft magnetic alloy
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  • Fast microwave crystallizing process for preparing nanometer crystalline iron-base soft magnetic alloy

Examples

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Embodiment 1

[0032] (A), Fe, Cu, Nb, Si, B with a purity greater than 99.9% are pressed as Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 After the ratio is prepared, put it into the medium frequency induction melting furnace, and vacuumize it to 10 -3 Pa above, and then pass high-purity argon for smelting, in order to ensure the uniformity of the alloy composition, remelt twice during the alloy smelting process;

[0033] (B) Put the coarsely broken alloy ingot after smelting into a quartz tube with a nozzle at the bottom, then place the quartz tube in the center of the induction coil in the cavity of the belt throwing machine, vacuumize, and under the protection of argon, make the mother Alloy induction melting,

[0034] (C), under the action of argon pressure, the alloy melt is sprayed onto the surface of the high-speed rotating copper roller through the nozzle at the bottom of the quartz tube. The speed of the copper roller surface is continuously adjustable within the range of 5-45m / s. This implem...

Embodiment 2

[0037] (A), Fe, Cu, Nb, Si, B with a purity greater than 99.9% are pressed as Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 After the ratio is prepared, put it into the medium frequency induction melting furnace, and vacuumize it to 10 -3 Pa above, and then pass high-purity argon for smelting, in order to ensure the uniformity of the alloy composition, remelt twice during the alloy smelting process;

[0038] (B) Put the coarsely broken alloy ingot after smelting into a quartz tube with a nozzle at the bottom, then place the quartz tube in the center of the induction coil in the cavity of the belt throwing machine, vacuumize, and under the protection of argon, make the mother Alloy induction melting;

[0039] (C), under the action of argon pressure, the alloy melt is sprayed onto the surface of the high-speed rotating copper roller through the nozzle at the bottom of the quartz tube. The speed of the copper roller surface is continuously adjustable within the range of 5-45m / s. This implem...

Embodiment 3

[0042] (A), Fe, Cu, Nb, Si, B with a purity greater than 99.9% are pressed as Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 After the ratio is prepared, put it into the medium frequency induction melting furnace, and vacuumize it to 10 -3 Pa above, and then pass high-purity argon for smelting, in order to ensure the uniformity of the alloy composition, remelt twice during the alloy smelting process;

[0043] (B) Put the coarsely broken alloy ingot after smelting into a quartz tube with a nozzle at the bottom, then place the quartz tube in the center of the induction coil in the cavity of the belt throwing machine, vacuumize, and under the protection of argon, make the mother Alloy induction melting,

[0044] (C), under the action of argon pressure, the alloy melt is sprayed onto the surface of the high-speed rotating copper roller through the nozzle at the bottom of the quartz tube. The speed of the copper roller surface is continuously adjustable within the range of 5-45m / s. This implem...

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Abstract

The present invention discloses fast microwave crystallizing process for preparing nanometer crystalline iron-base soft magnetic alloy. The technological process includes the following steps: 1. smelting alloy with Fe, Cu, Nb, Si and B in the ratio of Fe73.5Cu1Nb3Si13.5B9 in an induction furnace at vacuum 3-10 Pa in high purity Ar; 2. setting coarsely crushed alloy inside quartz pipe with nozzle in the bottom, setting the quartz pipe inside induction coil in a belt spinning machine, and melting the mother alloy in protecting Ar atmosphere; 3. spraying the alloy liquid under the pressure of Ar to the surface of rotating copper roller to form non-crystalline alloy belt; and 4. sealing the thin belt in quartz tube and crystallizing treatment in a microwave sintering furnace at 400-900 deg.c for 10-180 min to obtain ideal nanometer crystal structure.

Description

technical field [0001] The invention relates to a method for preparing nanocrystalline soft magnetic alloy by microwave rapid crystallization, in particular to a method for preparing iron-based nanocrystalline soft magnetic alloy with uniform structure and high saturation magnetization by microwave rapid crystallization. Background technique [0002] In 1988, Yoshizawa added Cu and M (M=Nb, Mo, W, Ta, etc.) Composition is Fe 73.3 Cu 1 Nb 3 Si 13.5 B 9 . Because nanocrystalline soft magnetic alloy has high saturation magnetic density, high initial permeability, low coercive force, low high-frequency magnetic loss, good hardness, wear resistance and corrosion resistance, good temperature stability These characteristics have set off a worldwide upsurge in the study of amorphous and nanocrystalline soft magnetic materials. The comprehensive magnetic properties of nanocrystalline soft magnetic materials are far superior to those of silicon steel, soft ferrite, permalloy an...

Claims

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Application Information

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IPC IPC(8): C22C38/16C22C33/00B22D11/01C21D9/46C21D11/00H01F1/147
Inventor 李丽娅易健宏葛毅成彭元东
Owner CENT SOUTH UNIV
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