A method for preparing superhydrophobic and frost-resistant surface of titanium alloy by ultrashort pulse laser

Abstract

The present invention relates to a method for preparing a titanium alloy super-hydrophobic and anti-frost surface by using ultra-short pulse laser, and belongs to the technical field of metal substrate surface modification. According to the method, the titanium alloy sample surface is subjected to polishing pretreatment, the polished sample surface is cleaned in an ultrasonic wave cleaning instrument with deionized water, blow drying with cold wind or air drying is performed after the cleaning, a laser processing technology is utilized, an ultra-short pulse laser is used to adjust the relevant process parameters, the sample is subjected to a surface treatment, countless micro structures are processed on the sample surface, and after completing the processing, the processed sample is placed into an electric heating drying box to bake so as to obtain the titanium alloy super-hydrophobic anti-frost surface, wherein the surface has the micron-scale papillary or crack-like structure or nano-scale hole structure and other structures, and further has characteristics of excellent super-hydrophobicity and frost resistance. The preparation method of the present invention has characteristics of simple process, convenient operation, high efficiency, low energy consumption, low cost, green environmental protection, and easy industrial application achieving.

Description

Technical field: [0001] The invention belongs to the technical field of surface modification of metal substrates, and relates to a method for preparing a superhydrophobic frost-resistant surface on a titanium alloy substrate. More specifically, the invention relates to a method for preparing a superhydrophobic frost-resistant surface of a titanium alloy by using an ultrashort pulse laser method. Background technique: [0002] After hundreds of millions of years of selection and evolution, animals and plants in nature have their own unique way of living. The super-hydrophobic self-cleaning surface is one of them: the body surface of weak insects can fly in the rain due to its super-hydrophobic function; Due to the super-hydrophobic micro-nano structure on the feet of water spiders, it can crawl on the water surface almost without resistance; the super-hydrophobic structure on the surface of lotus leaves greatly improves its self-cleaning function; the petal surfaces of plants...

AI Technical Summary

Problems solved by technology

Although femtosecond lasers can be used to process very precise microstructured surfaces, this simple method cannot cover up the inherent shortcomings of femtosecond lasers, such as extremely expensive, low processing efficiency, and harsh processing environments.

The patent application number 200910183588.8 discloses a design method and preparation method of a bionic metal superwetting cross-scale structure. This method is designed through a complex superhydrophilic theory. The sample to be treated is placed in a high vacuum chamber, and the Two scans are carried out to obtain a cross-scale microstructure close to the natural biological surface morphology. However, this method needs to strictly control various process parameters, and the processing cost is too high, which is completely unsuitable for industrial mass production.

Images