Biomimetic superhydrophobic surfaces are increasingly being used on substrate material in order to improve its usage performance, such as: corrosion resistance, self-cleaning, anti-icing and fluid drag reduction. However, many current preparation methods of superhydrophobic surface easily suffer from low mechanical strength, environmental pollution and high cost. This paper combines the advantages of wire electrical discharge machining (WEDM) and laser etching to propose a hybrid method to low-cost and pollution-free prepare hierarchical microstructure for wear-resistant superhydrophobic surface. The hierarchical microstructure includes discharge micro morphology by WEDM and surface texture by laser etching. WEDM experiments are carried out to analyze the effect of discharge micro morphology on the apparent contact angle. Laser etching experiments are implemented to analyze the influence of process parameters on the contact angle. Heat treatment is adopted to further reduce the surface energy. Experimental results show that the maximum value of surface contact angle (154.1±2°) can be obtained under rough cutting WEDM, groove width of 100μm, grid spacing of 300μm and heat treatment. In addition, the prepared superhydrophobic surfaces show good time durability, mechanical wear resistance and anti-icing.
