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Process of laser-cladding rare earth CeO2-nickel-based alloy composite coating on surface of aluminum or aluminum alloy

A technology of aluminum alloy surface and composite coating, applied in the direction of metal material coating process, coating, etc., can solve problems such as hindering application

Active Publication Date: 2014-03-12
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Some problems of aluminum alloy itself hinder its application in some special fields

Method used

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Embodiment Construction

[0019] The present invention is further illustrated by specific examples below:

[0020] The base material of the sample is 6063 aluminum alloy, with a size of 50mm×20mm×8mm (length×width×thickness). The oxide film on the surface of the aluminum alloy is eliminated by mechanical and chemical mixing methods. Polishing machine polishing, the surface roughness reaches Ra<2μm, the specific process route: the sample surface is polished with fine sandpaper - acetone cleaning - chemical reagent (3-10% hydrochloric acid) cleaning - water cleaning - drying for more than half an hour.

[0021] The powder ratio of the laser cladding coating is: 2% CeO 2 (wt%) and 98% Ni60 alloy powder, dried and evenly mixed, added adhesive and evenly coated on the aluminum alloy surface, the coating thickness is 0.8 ~ 1.0mm.

[0022] Laser cladding uses 6kW CO 2 Laser heat treatment equipment, put the aluminum alloy coated with mixed alloy powder into a semi-closed processing vessel, and pass in Ar ga...

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Abstract

The invention discloses a process of laser-cladding a rare earth CeO2-nickel-based alloy composite coating on the surface of an aluminum or an aluminum alloy. The process comprises the following steps: first, coating a layer of rare earth CeO2-nickel-based self-refluxed alloy powder on the surface of the aluminum alloy by a laser surface cladding technology; then, scanning the powder layer by laser to melt and clad the powder layer on the surface of the aluminum alloy to form a rare earth CeO2-nickel-based self-refluxed aluminum alloy cladding layer. According to the process disclosed by the invention, the rare earth CeO2-nickel-based self-refluxed aluminum alloy cladding layer with high performance is prepared by taking the aluminum or the aluminum alloy as the base body material by means of the laser surface cladding technology, so that good metallurgical binding between the cladding layer and the base body material is realized, and the performances of the material such as wear resistance, corrosion resistance and resistance to oxidation are improved.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, in particular to a laser cladding rare earth CeO on the surface of aluminum or aluminum alloy. 2 -The process of nickel base alloy composite coating. Background technique [0002] Aluminum and aluminum alloys are one of the most widely used materials in non-ferrous metals. Aluminum alloys have many excellent properties such as low density, easy processing, low thermal expansion coefficient, high thermal conductivity, high specific stiffness and specific strength. It has been widely used in daily production and life, as well as aviation, automobiles, high-speed rail, engine pistons, optical instruments, missile mosaic structures and other fields. However, with the further development of industrial production, higher requirements are put forward for the surface properties of aluminum alloys, and wear resistance, corrosion resistance and oxidation resistance are particularly important. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 王成磊张光耀高原吴炜钦张焱陆小会韦文竹
Owner GUILIN UNIV OF ELECTRONIC TECH
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