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Fe-Ga-Al alloy strip with high magnetostrictive properties and preparation method thereof

An alloy ribbon and telescopic technology, which is applied in the direction of material selection for magnetostrictive devices, metal material coating process, device material selection, etc., can solve problems such as difficult to achieve mass production, complex process equipment, unstable process problem, to achieve the effect of being conducive to large-scale production, high degree of orientation, and strong Gaussian texture

Active Publication Date: 2015-06-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In the above research on Fe-Ga and Fe-Al magnetostrictive strips, the shortcomings are that the method of secondary recrystallization induced by element S is unstable in actual production, poor in repeatability, complex in required process equipment, and difficult to produce. achieve mass production

Method used

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  • Fe-Ga-Al alloy strip with high magnetostrictive properties and preparation method thereof
  • Fe-Ga-Al alloy strip with high magnetostrictive properties and preparation method thereof

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Embodiment 1

[0031] Embodiment 1: Fe of high magnetostrictive performance 83 Ga 12 al 5 Alloy strip and its preparation method

[0032] Fe, 99.99% Ga, and 99.9% Al with a purity greater than 99.9% are used, and Ga and Al are proportioned according to atomic percentages considering the burning loss of 2% and 0.5% respectively. Put the prepared raw materials into a vacuum induction furnace. After vacuuming, argon is introduced as a protective gas. After induction heating until it is completely melted, it is poured into an ingot. The alloy ingot is kept at 1100°C for 10 hours to uniform the structure composition; forged at 1150°C to form a thickness The forged alloy is hot-rolled at 1150°C; the hot-rolled alloy strip is placed in a nitriding furnace, the temperature is raised to 950°C, an ammonia atmosphere is introduced, and it is kept for 4 minutes, then taken out and air-cooled; then Warm rolling at 500°C and cold rolling at room temperature, the total reduction is 98.4%, the total numb...

Embodiment 2

[0035] Embodiment 2: Fe of high magnetostrictive performance 83 Ga 8.5 al 8.5 Alloy strip and its preparation method

[0036] Fe, 99.99% Ga and 99.9% Al with a purity greater than 99.9% are used, and the Ga and Al are proportioned by atomic percentage considering the burning loss of 2% and 0.5% respectively. Put the prepared raw materials into a vacuum induction furnace. After vacuuming, argon is introduced as a protective gas. After induction heating until it is completely melted, it is poured into an ingot. The alloy ingot is kept at 1100°C for 10 hours to uniform the structure composition; forged at 1150°C to form a thickness The forged alloy is hot-rolled at 1150°C; the hot-rolled alloy strip is placed in a nitriding furnace, heated to 900°C, introduced into an ammonia atmosphere, kept for 5 minutes, and then taken out for air cooling; then After warm rolling at 600°C and cold rolling at room temperature, the total reduction is 98.5%, the total number of passes is 23, a...

Embodiment 3

[0039] Embodiment 3: (Fe 83 Ga 8.5 al 8.5 ) 99.9 (NbC) 0.1 Alloy strip and its preparation method

[0040] Fe, 99.99% Ga, 99.9% Al, ferroniobium, and iron-carbon alloys with a purity greater than 99.9% are used. Ga and Al are proportioned according to atomic percentages considering the burning loss of 2% and 0.5% respectively. Put the prepared raw materials into a vacuum induction furnace. After vacuuming, argon is introduced as a protective gas. After induction heating until it is completely melted, it is poured into an ingot. The alloy ingot is kept at 1200 ° C for 20 hours to uniform the composition of the structure; forged at 1150 ° C to form a thickness It is a rectangular billet of 18mm; the forged alloy is hot-rolled at 1150°C; the hot-rolled alloy strip is placed in a nitriding furnace, the temperature is raised to 900°C, an ammonia atmosphere is introduced, and it is kept for 5 minutes, then taken out and air-cooled; Warm rolling at 600°C and cold rolling at room...

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Abstract

The invention belongs to the field of magnetic materials, and relates to a Fe-Ga-Al alloy strip with high magnetostrictive properties and a preparation method thereof. The Fe-Ga-Al alloy strip is characterized in that a matrix of the alloy strip is a Fe-Ga-Al three-component alloy with a composition of Fe100-x-y-zGaxAlyMz, wherein M is one or more of B, Cr, V, Ti, Mn, MnS and NbC; and by calculating according to atomic ratios, x is equal to 7.5-25, y is equal to 5-15, x+y is equal to 15-30, z is equal to 0.1-1.0, and the balance is iron. The preparation method comprises the following steps: performing nitriding heat treatment for a short time respectively after hot rolling and cold rolling; introducing [N] into the process of heat treatment to ensure that [N] together with Al and other nitrides in the matrix form element combination so as to form tiny nitrides which are precipitated out; taking these precipitated phases as an inhibitor to inhibit the grain growth in the process of first-time recrystallization; and then performing second-time recrystallization and high-temperature heat treatment to finally obtain the Fe-Ga-Al alloy strip with a strong gauss texture. The magnetostrictive coefficient (3 / 2) lambdas of the alloy strip can reach more than 200ppm.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a Fe-Ga-Al alloy strip with high magnetostrictive performance and a preparation method thereof. Background technique [0002] When the magnetization state of ferromagnetic and ferrimagnetic substances changes, their own length and volume change slightly. This phenomenon is called magnetostriction. The change in volume is called bulk magnetostriction, and the change in length is called linear magnetostriction. Practical magnetostrictive materials generally refer to linear magnetostrictive materials. The magnitude of the magnetostriction is expressed by the magnetostriction coefficient λ, λ=ΔL / L (L is the original length of the material, and ΔL is the change in the length of the material when the magnetization state changes). The maximum magnetostriction coefficient produced by the material when it is magnetized is called the saturation magnetostriction coefficient λ s . Usually...

Claims

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Application Information

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IPC IPC(8): C22C38/06C21D8/12C23C8/26H01L41/20
Inventor 高学绪刘阳阳李纪恒袁超包小倩
Owner UNIV OF SCI & TECH BEIJING
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