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Treatment method for alloying surface of superhigh-strength aluminum alloy

An aluminum alloy surface, ultra-high-strength technology, applied in metal material coating process, ion implantation plating, coating and other directions, to improve strength, wear resistance and corrosion resistance, improve wear resistance and corrosion resistance sexual effect

Inactive Publication Date: 2012-09-26
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many researchers have carried out a lot of research on improving the corrosion resistance of aluminum alloys by surface spraying or chemical reaction methods, and improving the wear resistance of aluminum or aluminum alloy surfaces by laser cladding, no one has used vacuum magnetron sputtering to coat alloy films and Alloying and modifying the surface of ultra-high-strength aluminum alloy by means of intense pulsed electron beam radiation heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put the copper block and chromium block with a weight percentage of 95:5 into the intermediate frequency vacuum induction melting furnace, and vacuumize to P=4.0×10 -3 After Pa, turn on the intermediate frequency power supply for induction heating and melting. After the alloy is completely melted, it is poured into a water-cooled copper crucible with a diameter of 70 mm. Remove the skin of the poured CuCr5 alloy ingot, and saw it into a disc shape, and polish the surface of the disc-shaped CuCr5 alloy, make it smooth and clean, and then load it into the target material of the vacuum magnetron sputtering equipment On the device, CuCr5 alloy target for magnetron sputtering coating. Use metallographic sandpaper to grind the surface of 7A04 ultra-high-strength aluminum alloy. After the surface is smooth and flat, clean it with clean water, drop ethanol solution on the surface of the sample, and dry it with a hair dryer. There are no traces of water stains on the surface. ...

Embodiment ２

[0030] Put the copper block and chromium block with a weight percentage of 90:10 into the intermediate frequency vacuum induction melting furnace, and vacuumize to P=2.0×10 -3 After Pa, turn on the intermediate frequency power supply for induction heating and melting. After the alloy is completely melted, pour it into a water-cooled copper crucible with a diameter of 70mm. Remove the outer skin of the cast CuCr10 alloy ingot, and saw it into a disc shape, and polish the surface of the CuCr10 alloy in the disc shape, make it smooth and clean, and then load it into the target material of the vacuum magnetron sputtering equipment On the device, CuCr10 alloy target for magnetron sputtering coating. Use metallographic sandpaper to grind the surface of 7A04 ultra-high-strength aluminum alloy. After the surface is smooth and flat, clean it with clean water, drop ethanol solution on the surface of the sample, and dry it with a hair dryer. There are no traces of water stains on the su...

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Abstract

The invention provides a treatment method for alloying the surface of a superhigh-strength aluminum alloy. The treatment method comprises the following steps: firstly, manufacturing a Cu-Cr alloy cast ingot of which the Cr content is 3-20 percent by using a vacuum induction smelting method; carrying out surface removal and grinding treatment and then fixedly mounting the Cu-Cr alloy cast ingot on a target device of vacuum magnetron sputtering equipment; mounting the aluminum alloy subjected to clean surface grinding treatment on a matched clamp and mounting the aluminum alloy into a vacuum chamber of the vacuum magnetron sputtering equipment; opening the vacuum magnetron sputtering equipment; plating a Cu-Cr alloy film with the thickness of 2-10mum on the surface of an aluminum alloy substrate; and feeding the surface-plated Ni-Cr alloy film into strong-current pulse electron beam equipment for carrying out surface alloying treatment on the electron beams. According to the method disclosed by the invention, a layer of Cu-Cr alloying layer with high microhardness and favorable wear resistance and corrosion resistance is formed on the surface of the aluminum alloy. The alloyed layer and an aluminum alloy matrix are better bonded; and the surface strength of the aluminum alloy can be effectively improved and the wear resistance and corrosion resistance of the surface of the aluminum alloy are improved.

Description

technical field [0001] The invention relates to a treatment method for surface alloying of an ultra-high-strength aluminum alloy. The method is to form an alloyed layer with high hardness, high wear resistance and high corrosion resistance on the surface of ultra-high-strength aluminum alloy by using vacuum magnetron sputtering coating and high-current pulsed electron beam radiation heating. Surface modification technology field. [0002] Background technique [0003] As early as the 1930s, people began to study ultra-high-strength aluminum alloys, but due to the serious corrosion phenomenon of this series of alloys, they have not been practically applied. Until the early 1940s, the addition of elements such as Cu, Cr and Mn significantly improved the stress corrosion resistance and exfoliation corrosion resistance of this series of alloys. The United States and the former Soviet Union successively developed 7075 ultra-high-strength aluminum alloys for manufacturing aircr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/16C23C14/35C23C14/58C21D1/09C23F17/00
Inventor 周志明唐丽文黄伟九胡建军肖志佩张宝亮罗荣胡治
Owner CHONGQING UNIV OF TECH
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