摘要: This study systematically explores the friction and wear reduction mechanism under the synergistic effect of composite coating and composite micro-texture on ductile cast iron. The preparation process of the composite coating is optimized by using polytetrafluoroethylene (PTFE) as the base material and nano-alumina as the reinforcing agent. The composite micro-texture is efficiently fabricated by using a picosecond laser. Dry friction experiments show that the coating effectively improves the anti-friction performance of the ductile cast iron surface, and the added nano-alumina significantly enhances the wear resistance of the coating. The laser processing increases the hardness of the ductile cast iron surface, and the fabricated micro-texture can effectively store the coating and capture wear particles, the fabricated micro-texture can also slowly release the coating during subsequent friction processes, ensuring a low coefficient of friction (COF) and wear over a long friction time. Compared with the original samples, the average COF and wear mass of ductile cast iron with composite coating and composite micro-texture are decreased by 77% and 93.8%, respectively.