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High-strength and high-conductivity copper alloy for power switch spring contact and preparation method of high-strength and high-conductivity copper alloy

A spring contact and power switch technology, applied in the field of metal alloy materials and their preparation, can solve the problems of Be element toxicity, pollution, and damage to the health of operators, and achieve good electrical and mechanical properties

Active Publication Date: 2013-10-16
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the toxicity of the Be element: only one milligram of beryllium powder in every cubic meter of air will cause people to contract acute pneumonia - beryllium lung disease, which requires careful handling of metal Be metal during the smelting process and power station operation. , to prevent it from polluting the environment and damaging the health of operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put the steel mold into the resistance furnace and bake at 800°C for 15 minutes, then put it into the vacuum melting furnace. Weigh 11.456 kg of Cu-CATH-1 block, 0.36 kg of Cu-Cr master alloy block with a Cr mass fraction of 30%, put it into a spinel ceramic crucible, mix and melt at 1350 ° C, and weigh 0.04 kg of Cu-P Master alloy, the oxygen inside the alloy melt is removed, and 0.024kg of sponge Zr and 0.16kg of Cu-Ti master alloy with Ti mass fraction of 5% are successively put into the alloy feeding hopper and added to the vacuum melting furnace. Vacuum to 3.0 Pa, and the temperature was raised to 1350°C for 14 minutes. Cast into a steel mold at 1250°C and cool to room temperature to obtain a CuCrZrTi alloy material. Then hot extrude the prepared alloy material at 860°C, extrude into rods, and then undergo cold processing and water-cooled intermediate annealing, heat the annealed rods to 450°C, perform vacuum aging heat treatment for 4 hours, and then prepare Int...

Embodiment 2

[0029] Put the steel mold into the resistance furnace and bake at 820°C for 13 minutes, then put it into the vacuum melting furnace. Weigh 11.464 kg of Cu-CATH-1 block, 0.33 kg of Cu-Cr master alloy block with a Cr mass fraction of 30%, put it into a spinel ceramic crucible, mix and melt at 1380 °C, and weigh 0.04 kg of Cu-Cr P intermediate alloy, remove the oxygen inside the alloy melt, put 0.0216kg sponge Zr and 0.144kgTi Cu-Ti intermediate alloy with a mass fraction of 5% in turn into the alloy hopper and add it to the vacuum melting furnace, and the vacuum melting furnace is evacuated to 6.3Pa, the temperature was raised to 1380°C for 14 minutes. Cast into a steel mold at 1260°C and cool to room temperature to obtain a CuCrZrTi alloy material. Then hot extrude the obtained alloy material at 850°C, extrude into rods, and then undergo cold processing and water-cooled intermediate annealing, heat the annealed rods to 500°C, carry out 5h vacuum aging heat treatment, and then ...

Embodiment 3

[0031] Put the steel mold into the electric resistance furnace and bake at a constant temperature of 850°C for 12 minutes, carefully coat a layer of high-temperature resistant casting paint on the inner wall of the steel mold, and put it into the vacuum melting furnace. Weigh 11.517 kg of Cu-CATH-1 block, 0.345 kg of Cu-Cr master alloy block with a Cr mass fraction of 30%, put it into a spinel ceramic crucible, mix and melt at 1400 ° C, and weigh 0.04 kg of Cu-P Master alloy, the oxygen inside the alloy melt is removed, and 0.018kg of sponge Zr and 0.08kg of Cu-Ti master alloy with a mass fraction of Ti of 5% are put into the alloy hopper and added to the vacuum melting furnace in turn, and the vacuum melting furnace is evacuated to 6.3Pa, when the temperature rises to 1400°C, it is kept for 10 minutes. Cast into a steel mold at 1300°C and cool to room temperature to obtain a CuCrZrTi alloy material. Then hot extrude the obtained alloy material at 880°C, extrude into rods, an...

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Abstract

The invention relates to a CuCrZrTi alloy and a preparation method thereof, and aims at providing a novel high-strength and high-conductivity copper alloy material capable of replacing CuCo2Be and a preparation method of the novel copper alloy material. The alloy comprises the following metals by weight percentage: 0.5-1.2% of Cr, 0.03-0.3% of Zr, 0-0.1% of Ti and the balance of Cu and unavoidable impurities. The raw materials are subjected to vacuum melting, alloying, cast ingot casting, hot extrusion, cold processing, intermediate annealing, vacuum aging heat treatment and machining to form the alloy. The prepared copper alloy has good electrical and mechanical properties, is non-magnetic, resists low temperature, is free from sparks during impact, can replace the CuCo2Be material, and avoids environmental pollution during manufacturing of a toxic element Be and operation of an electric field, and since the prepared copper alloy has the better electrical properties, the commercial application and popularization of the spring contact are more competitive.

Description

technical field [0001] The invention relates to a metal alloy material and a preparation method thereof, in particular to a CuCrZrTi alloy and a preparation method thereof. Background technique [0002] In recent years, spring contacts with simple structure and reliable performance have been widely used in power switches. Spring contacts can not only simplify the electrical contact design of power switches, but also improve the reliability of electrical contacts. Therefore, in related The industry has received extensive attention and promotion. [0003] As the core of spring contacts, the selection of copper alloy materials is related to the stability and reliability of power switches and power stations, and is the most critical link in the design and production of spring contacts. Because of its high strength, elasticity and moderate electrical conductivity, CuCo2Be alloy has been commercially applied and promoted as a material for spring contacts of power switches. Howev...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08
Inventor 张航王文斌武旭红吴斌刘凯
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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