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Preparation of giant magnetostriction alloy wire

A magnetostrictive and alloy wire technology, which is applied in the field of preparation of large magnetostrictive alloy wire, can solve the problems of expensive, difficult to process and shape, limit sensor accuracy and application range, etc., to reduce production costs, cheap, excellent The effect of magnetostrictive properties

Inactive Publication Date: 2009-08-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Early magnetostrictive materials such as nickel-based alloys (Ni, Ni-Co, Ni-Co-Cr), iron-based alloys (Fe-Ni, Fe-Al, Fe-Co-V) and ferrite have good mechanical properties. performance, but its magnetostrictive performance is poor, only 10 ~ 100ppm, the wire made of it is severely limited the accuracy and application range of the sensor due to the small magnetostrictive amount
Among the currently researched magnetostrictive materials, the giant magnetostrictive material Tb-Dy-Fe alloy has excellent magnetostrictive properties, and its saturation value can be as high as 2000ppm, but the tensile resistance of Tb-Dy-Fe alloy is poor, and the material Very brittle, not easy to process; and Tb and Dy are expensive
Although the mechanical properties of Fe-Ga alloy are better than Tb-Dy-Fe, but the magnetostriction is small, and the price of Ga is expensive

Method used

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  • Preparation of giant magnetostriction alloy wire
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  • Preparation of giant magnetostriction alloy wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Preparation of Fe with preferred orientation 60 mn 40 Magnetostrictive Alloy Wire

[0036] (1) Smelting and casting rods, weighing Fe and Mn raw materials with a purity of 99.7% according to the atomic percentage of 60:40, putting them into a quartz crucible, and vacuuming to 5×10 -2 ~2×10 -3 Pa, argon gas is introduced as a protective gas, medium frequency heating induction melting, and then cast into Fe with a diameter of 12mm using a copper mold 60 mn 40 Alloy cast rod, ready for use.

[0037] (2) The composition is homogenized, and the Fe after smelting 60 mn 40 The alloy cast rod is placed in a vacuum tube furnace for component homogenization heat treatment, at a temperature of 900 ° C, kept for 120 hours, and cooled in the furnace.

[0038] (3) Milling, Fe after homogenizing the composition 60 mn 40 Alloy cast rods are milled on a milling machine; the cross-section is square and the thickness is 8mm Fe 60 mn 40 alloy rod.

[0039] (4) cold ...

Embodiment 2

[0045] Example 2: Preparation of Fe with preferred orientation 55 mn 45 Magnetostrictive Alloy Wire

[0046] (1) Smelting and casting rods, weighing Fe and Mn raw materials with a purity of 99.7% according to the atomic percentage of 55:45, put them into a quartz crucible, and vacuumize to 5×10 -2 ~2×10 -3 Pa, argon gas is introduced as a protective gas, medium frequency heating induction melting, and then cast into Fe with a diameter of 14mm using a copper mold 55 mn 45 Alloy cast rod, ready for use.

[0047] (2) The composition is homogenized, and the Fe after smelting 55 mn 45 The alloy cast rod is placed in a vacuum tube furnace for component homogenization heat treatment, at a temperature of 1000 ° C, kept for 24 hours, and cooled in the furnace.

[0048] (3) Milling, Fe after homogenizing the composition 55 mn 45 Alloy cast rods are milled on a milling machine; the cross-section is square and the thickness is 10mm Fe 55 mn 45 alloy rod.

[0049] (4) cold rol...

Embodiment 3

[0055] Example 3: Preparation of Fe with preferred orientation 50 mn 50 Magnetostrictive Alloy Wire

[0056] (1) Smelting and casting rods, weighing Fe and Mn raw materials with a purity of 99.7% according to the atomic percentage of 50:50, put them into a quartz crucible, and vacuumize to 5×10 -2 ~2×10 -3 Pa, argon gas is introduced as a protective gas, medium frequency heating induction melting, and then cast into Fe with a diameter of 20mm using a copper mold 50 mn 50 Alloy cast rod, ready for use.

[0057] (2) The composition is homogenized, and the Fe after smelting 50 mn 50 The alloy cast rod is placed in a vacuum tube furnace for component homogenization heat treatment, at a temperature of 1100 ° C, kept for 168 hours, and cooled in the furnace.

[0058] (3) Milling, homogenizing the composition of Fe after heat treatment 50 mn 50 The alloy casting rod is milled on a milling machine; the obtained Fe 50 mn 50 alloy rod.

[0059] (4) cold rolling, the Fe afte...

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Abstract

The invention discloses a method for preparing a large magnetostriction alloy wire, which comprises the following steps: (1) smelting of a cast rod; (2) uniformity of the compositions; (3) milling; (4) cold rolling; (5) wire cutting; (6) relief annealing; (7) cold drawing; and (8) recrystallization annealing. The method adopts a plastic working process combining cold rolling and cold drawing and can prepare the novel Fe-Mn magnetostriction alloy wire with large magnetostriction at the room temperature. The alloy comprises the following compositions and atoms in percentage: 30 to 60 percent of iron and 70 to 40 percent of manganese. The Fe-Mn magnetostriction alloy wire can generate large magnetostriction between 456 and 1,660 ppm in the environment of 1.2T external magnetic field. The preparation method has low energy consumption, reduces the production cost of the Fe-Mn alloy wire, can adjust the size of the alloy wire within a large range, is convenient for the design of miniature devices, and widens the use field of magnetostriction materials.

Description

technical field [0001] The invention relates to a method for preparing an alloy, in particular to a method for preparing a large magnetostrictive alloy wire. Background technique [0002] Magnetostrictive materials have the characteristics of recovering deformation in the presence of an external magnetic field and changing magnetic properties when stress is applied; it is an important functional material for energy and information conversion; in ultrasonics, robots, computers, automobiles, brakes, controllers , Transducers, sensors, micro-displacement devices, precision valves and anti-vibration devices have broad application prospects. The shape of magnetostrictive materials currently used in engineering is mainly rods, and the diameter of the rods is relatively large, generally around 5mm. The magnetostrictive wire has a small diameter and can be widely used in various sensors. [0003] Early magnetostrictive materials such as nickel-based alloys (Ni, Ni-Co, Ni-Co-Cr), i...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C22/00C22C30/00C22C33/04C22C1/02C21D1/26
Inventor 严密何爱娜张晶晶马天宇
Owner ZHEJIANG UNIV
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