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Cooper-aluminum composite and preparation method

A copper-aluminum composite material and aluminum alloy technology, which is applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of environmental pollution, long time of electroplating copper process, etc., and achieve good conductivity and easy operation , cost-saving effect

Active Publication Date: 2015-07-29
HENAN PINGGAO ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electroplating copper process has problems such as long time and environmental pollution. It is urgent to develop a new process to prepare copper coating on the aluminum alloy substrate.

Method used

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  • Cooper-aluminum composite and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The copper-aluminum composite material of this embodiment is prepared by the following method, and the specific operation steps are as follows:

[0031] 1) Surface treatment of aluminum alloy substrate: After removing the oil stain on the surface of the 40mm×40mm aluminum alloy with a thickness of 3mm with acetone, use 180 mesh alumina abrasive grains to sandblast the surface of the workpiece, the sandblasting angle is 90°, and the gas pressure is 0.7MPa , the sandblasting distance is 150mm, and the surface treatment of the aluminum alloy substrate is completed after the silver-white metallic luster appears on the surface;

[0032] 2) Put the aluminum alloy substrate after surface treatment into such as figure 1 In the shown atmosphere protective device with a length, width and height of 400×300mm×200mm, which is open at one end, copper wire with a purity of Φ2.0mm and a purity of 99.85% is used as the raw material for arc spraying copper coating, and the source of comp...

Embodiment 2

[0035] The copper-aluminum composite material of this embodiment is prepared by the following method, and the specific operation steps are as follows:

[0036] 1) Surface treatment of aluminum alloy substrate: put a 40mm×40mm aluminum alloy with a thickness of 3mm in an aqueous solution of sodium hydroxide with a mass concentration of 3.0% at 70°C, soak for 4 minutes, remove surface oil, and use 200 mesh alumina abrasive grains Sandblasting the surface of the workpiece, the sandblasting angle is 75°, the gas pressure is 0.65MPa, and the sandblasting distance is 100mm. After the silver-white metallic luster appears on the surface, the surface treatment of the aluminum alloy substrate is completed;

[0037] 2) Put the aluminum alloy substrate after surface treatment into such as figure 1 In the shown atmosphere protective device with a length, width and height of 400×300mm×200mm, which is open at one end, copper wire with a purity of Φ3.0mm and a purity of 99.99% is used as the ...

Embodiment 3

[0040] The copper-aluminum composite material of this embodiment is prepared by the following method, and the specific operation steps are as follows:

[0041]1) Surface treatment of aluminum alloy substrate: After removing the oil stain on the surface of the 40mm×40mm aluminum alloy with a thickness of 3mm with methanol, the surface of the workpiece is sandblasted with 190 mesh alumina abrasive grains, the sandblasting angle is 90°, and the gas pressure is 0.7MPa , the sandblasting distance is 150mm, and the surface treatment of the aluminum alloy substrate is completed after the silver-white metallic luster appears on the surface;

[0042] 2) Put the aluminum alloy substrate after surface treatment into such as figure 1 In the shown atmosphere protective device with a length, width and height of 400×300mm×200mm, which is open at one end, copper wire with a purity of Φ2.5mm and a purity of 99.95% is used as the raw material for arc spraying copper coating, and the source of c...

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Abstract

The invention discloses a cooper-aluminum composite and a preparation method and belongs to the technical field of metal processing. The cooper-aluminum composite adopts electric arc spraying, wherein the spray voltage is 30-35 V; the spray distance is 100-150 mm; the wire feed rate is 3-4 m / min; the electric current is 120-150 A; the pressure of compressed gas is 0.65-0.75 MPa; and the compressed gas flow is 1.6-2.0 m<3> / min. Cooper is sprayed on the surface of an aluminum alloy matrix in the protective atmosphere of inert gases to form a cooper coating; the cooper coating sprayed on the surface of the aluminum alloy matrix cannot be oxidized, is uniform and compact, red purple in color and high in the bonding strength with the matrix; and the cooper-aluminum composite has good electrical conductivity and can be used to prepare high-voltage electrical products. By adopting electric arc spraying for the spraying of the cooper coating, the preparation method of the cooper-aluminum composite causes no pollution to the environment, is simple and convenient to operate, and is quick, time-saving and cost-saving compared with the traditional electroplating and chemical plating methods.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to a copper-aluminum composite material and a preparation method thereof. Background technique [0002] Among all conductor materials, precious metals are most suitable for making conductive materials on the contact surface of electrical products. Among them, silver materials account for a large proportion. Not only the amount of Ag and Ag alloys on electrical products is large, but also the Ag-based contacts are easy to vulcanize during use. , easy to wear, life fluctuates greatly, and the remaining silver or silver alloy contacts on scrapped electrical appliances are difficult to recycle due to dispersion. It is generally believed that Cu is the most suitable substitute for Ag as a conductive material, because Cu has similar physical properties to Ag. , chemical, electrical and other properties, as an electrical contact material, Cu has the advantages of good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/08C23C4/12
Inventor 张颖杰李宝增张楠楠李宏楼邢军伟孙长平王丽丽李春迎林生军王路平张柳丽袁端鹏王海军李婧婧芦珂
Owner HENAN PINGGAO ELECTRIC