Application of copper-nickel alloy based on spinodal decomposition as reinforced constant-resistivity alloy

A copper-nickel alloy and amplitude modulation decomposition technology, which is applied in the field of resistance alloy materials, can solve problems such as the inability to strengthen the second phase particles, and achieve the effect of strength improvement

Active Publication Date: 2016-05-25
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, Cu-Ni resistance alloys can only use work hardening to improve strength, and cannot be strengthened by designing precipitation of second phase particles.
It is inconvenient to improve the strength of resistance elements with complex shapes (such as nonlinear, tubular, and plate) by only using a single strengthening method of work hardening

Method used

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  • Application of copper-nickel alloy based on spinodal decomposition as reinforced constant-resistivity alloy
  • Application of copper-nickel alloy based on spinodal decomposition as reinforced constant-resistivity alloy
  • Application of copper-nickel alloy based on spinodal decomposition as reinforced constant-resistivity alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] According to (Cu,Ni) 82％ Cr 18％ (at.%) The raw materials of Cu, Ni and Cr after shearing and cleaning are weighed, put into an electric arc melting furnace for smelting, and an alloy ingot with uniform composition is obtained. Seal the above alloy ingot into a vacuum degree of 5×10 -3 In the quartz tube of Pa, it is then kept at 1100°C for 10h for solid solution treatment and then water quenched to keep the material in fcc single phase, and aged at 800°C for 6h to cause amplitude modulation decomposition, that is, (Cu,Ni) based on amplitude modulation decomposition strengthening ) 82％ Cr 18％ Alloy, its resistivity changes with temperature and the morphology characteristics under the scanning electron microscope are as follows: Figure 4 and Figure 15 shown.

Embodiment 2

[0053] According to (Cu,Ni) 94％ Cr 6％ (at.%) The raw materials of Cu, Ni and Cr after shearing and cleaning are weighed, put into an electric arc melting furnace for smelting, and an alloy ingot with uniform composition is obtained. Seal the above alloy ingot into a vacuum degree of 5×10 -3 In the quartz tube of Pa, it is then kept at 1100°C for 10h for solid solution treatment and then water quenched to keep the material in fcc single phase, and aged at 800°C for 6h to cause amplitude modulation decomposition, that is, (Cu,Ni) based on amplitude modulation decomposition strengthening ) 94％ Cr 6％ Alloy, its resistivity changes with temperature and the morphology characteristics under the scanning electron microscope are as follows: Figure 5 and Figure 16 shown.

Embodiment 3

[0055] According to (Cu,Ni) 95％ Cr 5％ (at.%) The raw materials of Cu, Ni and Cr after shearing and cleaning are weighed, put into an electric arc melting furnace for smelting, and an alloy ingot with uniform composition is obtained. Seal the above alloy ingot into a vacuum degree of 5×10 -3 In a quartz tube of Pa, heat preservation at 1100°C for 10h for solid solution treatment and then water quenching to keep the material in fcc single phase, aging at 600°C or 800°C for 1h, 6h, 24h, 72h to cause amplitude modulation decomposition, namely (Cu,Ni) based on amplitude modulation decomposition strengthening 95％ Cr 5％ Alloy, the resistivity of the alloy aged at 800℃ for 6h changes with temperature and the morphology characteristics under the scanning electron microscope are as follows Image 6 and Figure 17 shown.

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Abstract

The invention discloses application of a copper-nickel alloy based on spinodal decomposition as a reinforced constant-resistivity alloy. The copper-nickel alloy is composed of copper, nickel and an optional element, the optional element is chromium or vanadium, an atomic ratio of copper to nickel is 25-75:25-75, total amount of copper and nickel in the copper-nickel alloy is 82-98at%, and amount of the optional element is 2-18at%. Strength of the copper-nickel alloy is improved remarkably, resistance temperature coefficient is small and is about 200 ppm / K at most and about 50 ppm / K at least, and the copper-nickel alloy is still a good constant-resistivity alloy material.

Description

technical field [0001] The invention belongs to the technical field of resistance alloy materials, and in particular relates to the application of a copper-nickel alloy based on amplitude modulation decomposition as a strengthened constant resistivity alloy. Background technique [0002] Resistance alloys are alloys with resistance characteristics as the main technical feature to manufacture different functional components. Constant resistivity alloys basically maintain a constant resistivity within a certain temperature range, so they are widely used in precision resistors, strain gauges, and heaters. Since the resistivity of the alloy remains basically constant, the most direct application is to make precision resistors. In addition, for the strain gauges that measure the small resistance changes through the bridge to calculate the strain, the materials used must keep the resistivity as constant as possible within the temperature range, so that the drift of the measured va...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C19/05C22C19/03C22C30/02C22F1/08C22F1/10
CPCC22C9/06C22C19/002C22C19/03C22C19/058C22C30/02C22F1/08C22F1/10
Inventor 王翠萍成瑞强施展卢勇杨水源韩佳甲刘兴军
Owner XIAMEN UNIV
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