In this paper

a novel gradient fabrication method of surface V-array structures by using the nanosecond pulsed laser is presented. In this method

the material of the surface structure is removed by using the gradient stratification according to the slope of the section contour

and then combines the theoretical modeling with the process experiment. The surface morphology of 304 stainless steel pits and the construction process of 3D structure under laser ablation were studied. The energy threshold ep = 0.044 6 mJ for laser ablation removal of 304 stainless steel was obtained. The variation of ablation depth with laser parameters (laser power

scan times and pulse spacing) was clarified. The V-shaped array structures with different structural depths and angles were fabricated by adjusting the unit cutting quantity and total cutting quantity respectively at 60 μm unit feed rate and comparing with the conventional structured preparation process. The results show that the surface V-shaped array structures fabricated by the present method can fitted to the theoretical size with an accuracy of 97%.