Method for preparing non-smooth surface of alloy substrate

Abstract

The invention relates to the field of laser processing, and particularly relates to a method for preparing a non-smooth surface of an alloy substrate. According to the adopted scheme, the method comprises the following steps: carrying out laser engraving on the surface of the alloy substrate in advance to prepare a micrometer groove with certain depth-to-width ratio; injecting carbide nano-particles into the micrometer groove, closely adsorbing the nano-particles into the groove by utilizing the size effect of the surface adsorption of nano-particles, i.e., an equilibrium adsorption constant is increases with the reduction of size; and impacting the surface of the alloy substrate by using strong pulse laser to generate a plasma shock wave on an absorption layer. According to the method, the adsorption effect of the nano-particles is further enhanced under the action of a strong shock wave, and a part of the nano-particles are implanted into the surface of the alloy substrate, so that the rigidity, friction and abrasion resistant property, corrosion resistant property and the like of the surface of the alloy substrate are greatly enhanced.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for preparing a non-smooth surface of an alloy matrix; injecting nanoparticles into micron-sized grooves and strengthening them by laser shock, so as to strengthen the adsorption of nanoparticles and realize the implantation of nanoparticles at the same time. Significantly improve the hardness, friction and wear performance and corrosion resistance of the substrate surface. Background technique [0002] Laser shock strengthening means that the absorbing layer absorbs laser energy to generate ion shock waves, and the shock waves are affected by the constrained layer, which produces a reaction force on the surface of the substrate, causing plastic deformation on the surface of the substrate, accompanied by residual compressive stress; laser shock implantation refers to The surface of the substrate is covered with a layer of nanoparticle absorption layer. Under the action of...

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Problems solved by technology

[0003]The usual method of laser shock implantation of nanoparticles on smooth substrate surface, the distribution of nanoparticles is uneven, the implantation depth is shallow, the performance of the substrate is not significantly improved, and some key points cannot be met Component usage requirements

[0004]Researchers are actively looking for suitable laser processing methods. For example, the patent with publication number CN102191497 A proposes a method and device for preparing nano-carbon-based films on the surface of alloy substrates. Although the preparation of nano-carbon-based films on the surface of the substrate can be achieved, the uniformity and depth of nanoparticle implantation need to be improved.

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