Method for reinforcing nickel-base alloy layer on aluminum alloy surface

A technology of aluminum alloy surface and nickel-based alloy, applied in the direction of metal material coating process, coating, etc., can solve the problems of low bonding strength, cracking, falling off, etc., and achieve the effect of expanding the scope of application

Inactive Publication Date: 2013-02-20
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

Although the previous methods can improve the corrosion resistance and wear resistance of the aluminum alloy surface, the reinforced layer obtained is relatively thin (only a few hundred microns), and the reinforced layer and the substrate are mechanical bonding interfaces or diffusion bonding interfaces. , the bonding strength is not high, so the wear resistance is still not high, and it is easy to crack, fall off, etc.
Although the more commonly used anodic oxidation method has a simple process, it cannot form a continuous oxide film on the aluminum matrix composite material, and cannot effectively prevent corrosion of the substrate, and the chromate produced in the production is very toxic, which is harmful to the aluminum matrix composite material. The environment is prone to serious pollution and endangers people's health
[0003] Among the severa

Method used

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Example Embodiment

[0020] The second embodiment of the present invention: the surface treatment of the aluminum alloy substrate is carried out first, and the treatment process still adopts a mechanical and chemical mixed method to eliminate the oxide film on the surface of the aluminum alloy. Sand grinding→ultrasonic cleaning→chemical reagent cleaning→drying. The chemical reagent cleaning is to soak the aluminum alloy substrate in NaOH solution at 65°C for 5 minutes and then take it out and dry it.

[0021] Prepare an aluminum alloy nickel-based alloy layer cladding material containing rare earths La and Ce. The formula of the nickel-based alloy cladding material is measured by weight percentage, and its composition is: 2.5% of rare earth La and Ce, and 0.7% to 0.8% of C , Si3.0%~3.5%, W3.5%~6.5%, Cr12%~16%, Fe<15%, the rest is Ni, impurity<1%. Mix the above powders, put them into a ball mill and mill them for 15 hours, take them out and add an alcohol binder, stir them evenly to form a paste, t...

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Abstract

The invention discloses a method for reinforcing a nickel-base alloy layer on an aluminum alloy surface, which comprises the following steps: doping rare earths La and Ce in a certain proportion into nickel-base alloy powder, and carrying out laser surface cladding to obtain a metallurgically-bonded high-hardness high-wear-resistance high-corrosion-resistance nickel-base alloy layer on the aluminum alloy surface. The hardness of the nickel-base alloy layer is up to 1350HV, and the wear resistance and corrosion resistance are respectively doubled as compared with the prior art. The invention has an important function on widening the application range of the aluminum alloy and expanding the application of the aluminum alloy in the high technology field.

Description

technical field [0001] The invention relates to a technical method for modifying the surface of an aluminum alloy, in particular to a method for strengthening a nickel-based alloy layer on the surface of an aluminum alloy by adding rare earth elements. Background technique [0002] As we all know, aluminum alloy has many excellent properties such as low density, low thermal expansion coefficient, high specific stiffness and specific strength, good thermal conductivity, corrosion resistance and good formability, so it is widely used in aerospace, automobiles, home appliances, advanced manufacturing, electric power It is widely used in many fields, but in terms of the properties of aluminum alloy, it also has the disadvantages of relatively low hardness, high friction coefficient and easy wear and scratch due to poor wear resistance and difficult lubrication of the contact surface. This limits the scope of use of aluminum alloys. In recent years, the use of aluminum alloy sur...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/05
Inventor 王成磊高原徐晋勇张光耀蔡航伟马志康
Owner GUILIN UNIV OF ELECTRONIC TECH
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