FeGa magnetostriction alloy wire and preparation method thereof

A magnetostrictive and alloy wire technology, applied in the field of FeGa magnetostrictive alloy wire and its preparation, can solve the problem of low degree of grain alignment of FeGa magnetostrictive materials

Active Publication Date: 2012-04-04
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the FeGa magnetostrictive material grains prepared by the above technology are arranged in a low degree along the crystal direction, which limits the further improvement of the magnetostrictive strain. The existing literature does not involve the magnetic field in the directional solidification and heat treatment of FeGa alloys. Technical reports on coupled applications in processes

Method used

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  • FeGa magnetostriction alloy wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Using pure Fe with a purity of ≥99.9wt% and Ga with a purity of ≥99.9wt% as raw materials, the as-cast Fe-15%Ga (atomic fraction) was prepared by suction casting in a high-vacuum electric arc furnace under the protection of argon at 0.5 standard atmospheric pressure master alloy;

[0027] (2) Place the prepared as-cast FeGa master alloy in a 0.01T magnetic field, raise the temperature to 1550°C, and keep it for 2 hours, then make the cast FeGa master alloy under the conditions of a temperature gradient of 50°C / mm and a pulling rate of 0.5mm / s. Directional solidification of FeGa master alloy;

[0028] (3) Place the prepared FeGa alloy directionally solidified under a magnetic field in a 20T magnetic field, at a temperature of 1000°C, keep it warm for 12 hours, cool it to 750°C at a cooling rate of 5°C / min, keep it warm for 24 hours, and then Cool to room temperature with the furnace;

[0029] (4) Hot forging the FeGa alloy after magnetic field heat treatment at 700...

Embodiment 2

[0036] (1) Using pure Fe with a purity of ≥99.9wt% and Ga with a purity of ≥99.9wt% as raw materials, the as-cast Fe-27%Ga (atomic fraction) was prepared by suction casting in a high-vacuum electric arc furnace under the protection of argon at 0.75 standard atmospheric pressure master alloy;

[0037] (2) Place the prepared as-cast FeGa master alloy in a 10T magnetic field, raise the temperature to 1450°C, keep it for 1 hour, and make the as-cast Directional solidification of FeGa master alloy;

[0038] (3) Place the prepared FeGa alloy directionally solidified under a magnetic field in a 12T magnetic field, at a temperature of 1050°C, keep it warm for 0.5 hours, cool it to 850°C at a cooling rate of 0.5°C / min, hold it for 0.5 hours, and then Quenching;

[0039] (4) Hot forging the FeGa alloy after magnetic field heat treatment at 720°C with a total area reduction rate of 0.35;

[0040] (5) The hot-forged FeGa alloy is subjected to large plastic deformation at room temperatu...

Embodiment 3

[0046] (1) Using pure Fe with a purity of ≥99.9wt% and Ga with a purity of ≥99.9wt% as raw materials, the cast Fe-30%Ga (atom fraction) master alloy;

[0047] (2) Place the prepared as-cast FeGa master alloy in a 20T magnetic field, raise the temperature to 1400°C, hold it for 0.5 hours, and make the as-cast FeGa Directional solidification of master alloy;

[0048] (3) Place the prepared FeGa alloy directionally solidified under a magnetic field in a 0.01T magnetic field, at a temperature of 1100°C, keep it warm for 24 hours, then cool it to 800°C at a cooling rate of 2°C / min, and hold it for 10 hours. Then quench;

[0049] (4) Hot forging the FeGa alloy after magnetic field heat treatment at 800°C with a total area reduction rate of 0.5;

[0050] (5) The hot-forged FeGa alloy is subjected to large plastic deformation at room temperature with a total area reduction rate of 0.4;

[0051] (6) Place the FeGa material obtained after large plastic deformation in a magnetic fiel...

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Abstract

The invention provides a FeGa magnetostriction alloy wire which comprises the following components by atomic percent: 15-30% of Ga and the balance of Fe. The diameter of the alloy wire is 0.1-1mm, the tensile strength is 400-650MPa, and the magnetostrictive strain without action of external stress is 80-225ppm. The invention also provides a preparation method of the FeGa magnetostriction alloy wire, and the preparation method comprises the following steps: cast master alloy preparation, alloy directional solidification under a magnetic field, alloy thermal treatment under the magnetic field, drawing plastic deformation and the like. According to the invention, the characteristic of an alpha-Fe phase that the preferred direction and the preferred growth direction are (100) crystallographicdirections is fully utilized, and the action of the magnetic field is utilized to control the alloy solidification and thermal treatment processes, thus the obtained FeGa alloy wire through preparation has the advantages that the magnetostrictive strain is improved by 0.9-2.8 times compared with the FeGa alloy wire with same Ga content prepared in the prior art and the magnetostrictive strain is improved by 30-85% compared with the FeGa alloy wire without the action of the magnetic field under same conditions.

Description

technical field [0001] The invention relates to the technical field of alloy preparation, in particular to a FeGa magnetostrictive alloy wire and a preparation method thereof. Background technique [0002] FeGa alloy has excellent performance characteristics such as low cost, high tensile strength, low brittleness, high magnetic permeability, and good low-field performance. It is used in sonar underwater acoustic transducer technology, electroacoustic transducer technology, micro displacement drive, It has broad potential application value in military and civilian dual-use high-tech fields such as anti-vibration and anti-vibration and fluctuation oil recovery, and is an important strategic magnetic material. Since the discovery of FeGa magnetostrictive materials, important scientific research institutions at home and abroad have carried out research on the preparation process and properties of FeGa magnetostrictive materials. However, since the magnetostrictive strain of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00B23P15/00
Inventor 左小伟王恩刚张林贾鹏赫冀成
Owner NORTHEASTERN UNIV LIAONING
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