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Production method of iron-based magnetostrictive alloy wire

A magnetostrictive and alloy wire technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of undiscovered iron-based magnetostrictive wire patents, etc. The effect of improving sensitivity and precision

Active Publication Date: 2012-07-04
NAT ENG RES CENT OF RARE EARTH METALLURGY & FUNCTION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] These published patents on magnetostrictive wires are all patents on Fe-Ga-based magnetostrictive wires, and no patents on other iron-based magnetostrictive wires have been found.

Method used

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  • Production method of iron-based magnetostrictive alloy wire
  • Production method of iron-based magnetostrictive alloy wire
  • Production method of iron-based magnetostrictive alloy wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Fe 78 Ga 17 Al 4 Tb 1 Magnetostrictive wire

[0031] Weigh the raw materials required for the design composition with an electronic balance, wherein Fe, 99.99% Ga, 99.5% Al, and 99.9% Tb with a purity greater than 99% are used, and an additional 2% of Ga and Tb are added. Put the good raw materials into the crucible, and evacuate to 3×10 -3 Pa, pass through argon gas to protect and heat to form an alloy, melt and refine for 2 to 3 minutes, and then pour into an alloy ingot;

[0032] Hot forging the alloy ingot at 1050°C into a 20×20mm billet to provide raw materials suitable for rolling;

[0033] The forged alloy is hot-rolled at 1000°C and 500°C respectively, and rolled into a φ8mm wire rod;

[0034] The wire rod rolled into φ8mm is cold-drawn at 10-35°C, the total number of passes is 18, and cold-drawn into a wire of φ2.5mm.

[0035] image 3 .for Fe 78 Ga 17 Al 4 Tb 1 The room temperature magnetostriction curve of the alloy wire, under the exte...

Embodiment 2

[0036] Example 2: Fe 76.2 Ga 18 mn 4 V 1 Ce 0.8 Magnetostrictive wire

[0037] Weigh the raw materials required for the design composition with an electronic balance, wherein Fe, 99.99% Ga, 99.9% Mn and V with a purity greater than 99% are used, and an additional 3% Ga and Ce are added to the burning loss. Put it in a crucible and evacuate to 3×10 -3 Pa, pass through argon gas to protect and heat to form an alloy, melt and refine for 2 to 3 minutes, and then pour into an alloy ingot;

[0038] Hot forging the alloy ingot at 1100°C into a 20×20mm billet to provide raw materials suitable for rolling;

[0039] The forged alloy is hot-rolled at 980°C and 450°C respectively, and rolled into a φ8mm wire rod;

[0040]The wire rod rolled into φ8mm is cold-drawn at 10-35°C, and cold-drawn into a wire of φ1.5mm.

[0041] Figure 4 .for Fe 76.2 Ga 18 mn 4 V 1 Ce 0.8 The room temperature magnetostriction curve of the alloy wire, under the external magnetic field of 2200Oe, th...

Embodiment 3

[0042] Example 3: Fe 58.5 Ga 17 Ni 20 Cu 2 Ti 3 Dy 0.5 Magnetostrictive wire

[0043] Weigh the raw materials required for the design composition with an electronic balance, wherein Fe, 99.99% Ga, 99.5% Ni, 99.9% Cu, Ti, Dy with a purity greater than 99% are used, and 3% Ga, Dy are added. Loss, put the prepared raw materials into the crucible, vacuum to 3×10 -3 Pa, pass through argon gas to protect and heat to form an alloy, melt and refine for 2 to 3 minutes, and then pour into an alloy ingot;

[0044] Hot forging the alloy ingot at 1100°C into a 20×20mm billet to provide raw materials suitable for rolling;

[0045] The forged alloy is hot rolled at 1000°C and warm rolled at 450°C respectively, and rolled into a wire rod of φ6.5mm;

[0046] The wire rod rolled into φ8mm is cold-drawn at 10-35°C, and cold-drawn into a wire of φ1.0mm.

[0047] Figure 5 .for Fe 58.5 Ga 17 Ni 20 Cu 2 Ti 3 Dy 0.5 The room temperature magnetostrictive performance curve of the alloy...

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Abstract

The invention relates to an iron-based magnetostrictive alloy wire and a production method thereof. The molecular formula of the alloy is Fe1-x-yMxNyREz, M is one or more of Ga, In, Cr, Ni and Co, N is one or more of Al, Mn, V, Nb, Ti and Zr, RE is one or more of La, Ce, Pr, Nb, Tb, Dy, Y and Sc, wherein x is equal to 15 percent to 60 percent, y is equal to 0 percent to 10 percent, z is equal to 0 to 1.0, and the rest is Fe. The technical point is as follows: according to the alloy composition requirement, an ingot casting is smelted, hammer cogging is carried out, and after a wire rod with the diameter of 8mm is rolled, the wire rod is cold-drawn into the alloy wire. The size of the alloy wire produced by the method can be adjusted within a wide range, consequently, a sensor can be conveniently designed, and the magnetostrictive material can be used in more fields. The magnetostriction coefficient of the iron-based magnetostrictive material can reach 367ppm under a 4000Oe applied magnetic field.

Description

technical field [0001] The invention relates to a preparation method of iron-based magnetostrictive alloy wire, which belongs to the field of magnetic materials. Background technique [0002] When a ferromagnetic substance changes its magnetization state, its own length and volume change slightly. This phenomenon is called magnetostriction. The change in volume is called volume magnetostriction; the change in length is called linear magnetostriction. Practical magnetostrictive materials refer to materials with linear magnetostrictive properties. Almost all ferromagnetic materials have magnetostrictive properties. The magnitude of the magnetostriction is expressed by the magnetostriction coefficient λ, which is defined as λ=ΔL / L (L is the original length of the material sample, and ΔL is the state of the sample when the magnetization state changes). When the ferromagnetic material is affected by the axial magnetic field and the circumferential magnetic field at the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C22C33/06B21C37/06H01F1/047
Inventor 江丽萍郝洪波张光睿吴双霞杨建东
Owner NAT ENG RES CENT OF RARE EARTH METALLURGY & FUNCTION MATERIALS