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A kind of preparation method of graphene-reinforced copper-based electrical contact material

An electrical contact material, graphene technology, applied in circuits, electrical switches, electrical components and other directions, can solve the problems of reducing the electrical conductivity and thermal conductivity of copper contact materials, and it is difficult to obtain comprehensive performance copper-based contact materials, etc. Conducive to large-scale continuous production, high hardness and high wear resistance

Active Publication Date: 2017-06-06
冷金凤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Both of the above two patents improve the corrosion resistance and oxidation resistance of copper alloys by adding rare earth or rare earth oxides, but at the same time, due to the addition of low-conductivity materials such as ceramic particles and chromium, the copper contacts are reduced to a certain extent. The electrical and thermal conductivity of the material makes it difficult to obtain a copper-based contact material with excellent comprehensive properties

Method used

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  • A kind of preparation method of graphene-reinforced copper-based electrical contact material

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Put the copper powder with a weight content of 1.0% graphene and 99.0% into a ball mill to mix the powder. The process parameters of the ball mill are: the ball mill tank is first evacuated and then filled with argon protection, the speed is 150r / min, and the ball mill is 20 minutes. Stop for 5 minutes, turn clockwise and counterclockwise alternately, and the total mixing time is 4 hours. After powder mixing, cold press molding is made into a copper-graphene master alloy, the pressure is 200MPa, the holding time is 5 minutes, the graphene is 1-10 layers, the purity of the copper powder is 99.9%, and the particle size is 150 mesh.

[0028] (2) Copper with a purity of 99.9% is smelted in an intermediate frequency furnace and covered with glass or borax to prevent oxidation of the copper melt. The quality of glass or borax is 0.8-1.2% of the weight of the charge.

[0029] (3) Add 0.03% copper weight rare earth yttrium into the copper melt, wrap the rare earth with copp...

Embodiment 2

[0032] (1) Put the copper powder with a weight content of 5.0% graphene and 95.0% into a ball mill to mix the powder. The process parameters of the ball mill are: the ball mill tank is first evacuated and then filled with argon protection, the speed is 350r / min, and the ball mill is 15 minutes. Stop for 5 minutes, turn clockwise and counterclockwise alternately, and the total mixing time is 2 hours. After powder mixing, cold press molding is made into a copper-graphene master alloy, the pressure is 400MPa, the holding time is 3 minutes, the graphene is 1-10 layers, the purity of the copper powder is 99.9%, and the particle size is 300 mesh.

[0033] (2) Copper with a purity of 99.9% is smelted in an intermediate frequency furnace and covered with glass or borax to prevent oxidation of the copper melt. The quality of glass or borax is 0.8-1.2% of the weight of the charge.

[0034] (3) Add lanthanum-rich mixed rare earth metals with 2% copper weight in the copper melt, wrap the ...

Embodiment 3

[0037] (1) Put copper powder with a weight content of 2.0% graphene and 98.0% into a ball mill to mix the powder. The process parameters of the ball mill are: the ball mill tank is first evacuated and then filled with argon protection, the speed is 200r / min, and the ball mill is 15 minutes. Stop for 5 minutes, turn clockwise and counterclockwise alternately, and the total mixing time is 3 hours. After powder mixing, cold press molding is made into a copper-graphene master alloy, the pressure is 300MPa, the holding time is 4 minutes, the graphene is 1-10 layers, the purity of the copper powder is 99.9%, and the particle size is 200 mesh.

[0038] (2) Copper with a purity of 99.9% is smelted in an intermediate frequency furnace and covered with glass or borax to prevent oxidation of the copper melt. The quality of glass or borax is 0.8-1.2% of the weight of the charge.

[0039] (3) Add lanthanum-rich mixed rare earth metal with 1.0% copper weight in the copper melt, wrap the rar...

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Abstract

The invention relates to a preparation method for a graphene reinforced copper-matrix electrical contact material. The preparation method comprises the steps that 1.0%-5.0% by weight of graphene and 95.0%-99.0% by weight of copper powder are subjected to ball milling for powder mixing and cold press molding, copper is smelted in an intermediate frequency furnace, copper-graphene intermediate alloy is added into molten copper, a composite is prepared through a casting process, and the composite is subjected to stress relief annealing and processing molding. According to the preparation method, graphene reinforcements are added into copper alloy to be used as a framework, so that the material has high hardness, high abrasion resistance, mechanical shock resistance and fusion-welding resistance. By adding rare earth, the oxidation resistance and electric arc burning resistance of the copper-alloy electrical contact material are improved.

Description

technical field [0001] The invention relates to a preparation method of an electric contact material, in particular to a preparation method of a graphene-reinforced copper-based electric contact material. Background technique [0002] Electrical contact materials are key components of instruments and meters, and play an important role in the life and reliability of instruments and meters. Copper-based contact materials have partially replaced silver-based contacts in recent years due to their low price, electrical conductivity, and thermal conductivity similar to silver, reducing the loss of precious metal silver. However, because the copper contact material is easily oxidized, copper oxide and cuprous oxide with low resistivity are produced, which increases the contact resistance of the contact element and makes it easy to heat up during use, resulting in the reliability of the contact material. and reduced service life. [0003] The existing patent document (publication ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C1/10C22F1/08C22C9/00H01H11/04
CPCC22C1/1036C22C9/00C22F1/08H01H11/048
Inventor 冷金凤时传霞张鑫洋刘阳周庆波
Owner 冷金凤
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