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High-temperature fenico magnetostrictive alloy and preparation method thereof

A magnetostrictive and alloy technology, applied in the field of alloys, can solve the problems of difficult to process small wires, high brittleness, and difficult processing, and achieve high temperature and long-term stable and accurate measurement, large saturation magnetostriction coefficient, and stable The effect of magnetostrictive properties

Active Publication Date: 2016-08-17
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth giant magnetostrictive material TbDyFe alloy has huge magnetostrictive strain, but it is brittle, cannot be processed into wire and is expensive
The research on Fe-Ga alloy is in its infancy, and it also has a high magnetostrictive strain, but its magnetostrictive performance is greatly affected by the crystal orientation, and the processing is also difficult, and it is difficult to process it into the small size required by the sensor. Wire
Therefore, the waveguide wires used in magnetostrictive sensors are mostly Fe-Ni alloy wires. Since the content of Ni is usually below 45%, and contains elements such as Cr that lower the Curie temperature, the magnetic properties of traditional Fe-Ni alloy wires The stretchability can only be maintained below 100°C, which limits the temperature range of the sensor, and it is difficult to meet the requirements for use below 450°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The composition content of the selected alloy is: Ni: 39.5%, Co: 15.5%, Cr: 3.0%, Mo: 3.0%, Ti: 2.5%, Al: 0.6%, B: 0.003%, and the balance is Fe.

[0047] Take the above components and put them into vacuum induction melting. The melting process is melting power 80Kw, refining power 20-30Kw, vacuum degree better than 1Pa, melting time 15-30 minutes; Heating in the furnace to 1150°C, hot forging into billets of various required specifications, hot rolling the alloy billets at 900-1170°C, and rolling them into wire rods. The rolled wire rod is cold-drawn at 0-45°C, and cold-drawn into a wire with a diameter of 0.72mm or less.

[0048] Put the wire into a vacuum heat treatment furnace, keep it at 1100±5°C for 1 hour; then cool it to 580±5°C at a rate of 60°C / h, keep it at 5 hours and then cool it to room temperature with the furnace, the obtained high temperature FeNiCo magnetic Strict alloy, used to equip high temperature magnetostrictive sensor.

[0049] The test result...

Embodiment 2

[0051] The difference from the examples is that the composition content of the selected alloy is: Ni: 49.0%, Co: 10.0%, Cr: 2.5%, Mo: 2.5%, Ti: 2.0%, Al: 1.0%, B: 0.005%, and the balance Be Fe, all the other are with embodiment 1.

[0052] The test results show that the alloy's saturation magnetostriction coefficient λs=17×10 -6 / °C, the Curie temperature of the alloy: Tc=470°C.

Embodiment 3

[0054] Different from the embodiment, the composition content of the selected alloy is Ni: 32.0%, Co: 21.0%, Cr: 1.3%, Mo: 1.5%, Ti: 3.0%, Al: 0.3%, B: 0.004%, and the balance is Fe, all the other are with embodiment 1.

[0055] The test results show that the alloy's saturation magnetostriction coefficient λs=29×10 -6 / °C, the Curie temperature of the alloy: Tc=464°C.

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Abstract

The invention discloses a high-temperature FeNiCo magnetostrictive alloy and a preparation method thereof. The weight percent of the chemical composition of the alloy is: Ni: 30.0-55.0%, Co: 1.0-22.0%, Cr: 1.0-3.5%, Mo: 1.0- 3.5%, Ti: 1.0-3.0%, Al: 0-2.0%, B: 0-0.006%, and the balance is Fe. The high-temperature magnetostrictive alloy of the invention has a high Curie temperature, good magnetic properties and a large saturation magnetostriction coefficient in a wide temperature range, and can meet the high-temperature use requirements of high-precision instruments and meters.

Description

technical field [0001] The invention relates to an alloy, in particular to a high-temperature FeNiCo magnetostrictive alloy and a preparation method thereof. Background technique [0002] Magnetostrictive materials are new intelligent functional materials developed rapidly since the 1960s and 1970s. At present, they are regarded as strategic materials for improving the country's high-tech comprehensive competitiveness in this century. The mechanical energy / electrical energy conversion efficiency of magnetostrictive materials High energy density, high response speed, good reliability, and simple driving method, it is these performance advantages that have triggered revolutionary changes in traditional electronic information systems, sensing systems, and vibration systems. As a class of smart materials, magnetostrictive materials are widely used in technical fields such as energy conversion, drive, and sensing. Using the Wiedemann effect of materials, magnetostrictive materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/02C22B9/18C22F1/10
Inventor 王宏张登友高学绪张十庆杨百炼邹兴政刘洋郭卫民李方唐锐王东哲刘庆宾
Owner CHONGQING MATERIALS RES INST
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