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High temperature radiation resistant magnetostriction alloy

A magnetostrictive and radiation-resistant technology, applied in the field of alloys, can solve the problems that the magnetostrictive performance is greatly affected by the crystal orientation, affect the performance of the sensor, and difficult to process small wires, so as to improve and stabilize the magnetostrictive performance. , to meet the effect of long-term stable and accurate measurement and good radiation resistance

Active Publication Date: 2014-02-05
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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
At present, the waveguide wires used in magnetostrictive sensors are mostly Fe-Ni alloy wires, but the content of Ni in them is usually below 45%, and contains elements such as Cr that lower the Curie temperature, making the magnetostrictive 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 350°C
The addition of Co can increase the local temperature, but the Co element becomes an unstable isotope and transmutes into other elements after being irradiated at high temperature and large radiation dose, which greatly deteriorates the magnetostrictive properties of the material, thus Affects sensor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The composition content of the selected alloy is: Ni: 48.5%, Mo: 1.0%, Ti: 1.0%, Al: 0.2%, and the balance is Fe.

[0049] 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 to 1150°C in the furnace, hot forging into square billets of various required specifications (such as 40mm×40mm), 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 0.63mm or less.

[0050] Put the wire into a vacuum heat treatment furnace and keep it warm at 1100±5°C for 1 hour; then cool it to 580±5°C at a rate of 60°C / h, keep it warm for 5 hours and then cool it down to room temperature with the furnace to obtain a high-temperature radiation-resistant According to the magnetostrictive alloy, it is used to equip the high temperatu...

Embodiment 2

[0053] The difference from the embodiment is that the composition content of the selected alloy is: Ni: 55.0%, Cr: 2.5%, Mo: 2.0%, Ti: 2.3%, Al: 0.3%, and the balance is Fe. , all the other are with embodiment 1.

[0054] The test results show that the alloy's saturation magnetostriction coefficient λs=26×10 -6 / °C, the Curie temperature of the alloy: Tc=385°C.

Embodiment 3

[0056] The difference from the embodiment is that the composition content of the selected alloy is Ni: 64.0%, Cr 5.0%, Mo: 3.0%, Ti: 2.9%, Al: 0.7%, the balance is Fe, and the rest are the same as in embodiment 1.

[0057] The test results show that the alloy's saturation magnetostriction coefficient λs=21×10 -6 / °C, the Curie temperature of the alloy: Tc=397°C.

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PUM

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Abstract

The invention discloses a high temperature radiation resistant magnetostriction alloy as well as a preparation method thereof. The alloy comprises the following chemical components in percent by weight: 43.0-66.0% of Ni, 0-5.0% of Cr, 1.0-3.5% of Mo, 1.0-3.0% of Ti, 0-1.0% of Al and the balance of Fe. The high temperature radiation resistant magnetostriction alloy disclosed by the invention has higher Curie temperature, good magnetostriction performance in a wider temperature range and great saturated magnetostriction coefficient, is excellent in resistance to radiation in a reactor and free from irradiation activation or disintegration caused by high dose of neutrons or gamma rays, and can satisfy the using demands of great irradiation dose at high temperatures of a reactor core of the reactor.

Description

technical field [0001] The invention relates to an alloy, in particular to a high-temperature radiation-resistant magnetostrictive alloy and a preparation method thereof. Background technique [0002] Magnetostrictive material is a new type of intelligent functional material developed rapidly since the 1960s and 1970s. At present, it has been regarded as a strategic material for improving the country's high-tech comprehensive competitiveness in this century. Magnetostrictive materials have mechanical energy / electrical energy conversion efficiency High energy density, high response speed, good reliability, simple driving mode and so on. Using the Wiedemann effect of materials, magnetostrictive materials are processed into wires, pipes, rods or strips, etc., which are widely used as core sensitive components in liquid level sensors, displacement sensors, magnetoelastic torque sensors and Young's modulus Quantity and other sensors, and are widely used in tanks, nuclear submari...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C38/14C22C33/04C21D8/12H01L41/20H01L41/47
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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