Tribological Characteristics of Laser Multi-scale Composite Textures for YT-15 Cemented Carbide Surface

During the turning operation with cemented carbide tools, plastic deformation of the workpiece, along with intense friction between the tool and the chip, inevitably induces tool wear. The rational implementation of surface texture technology on the tool surface can enhance the machining quality of the workpiece surface and significantly extend the tool’s service life. In this study, laser processing technology was employed to fabricate single textures and multi-scale composite textures featuring circular, elliptical, and V-shaped patterns on the surface of YT-15 cemented carbide. Friction and wear experiments were conducted to investigate the effects of various shapes, arrangements, and combinations on the friction properties of textured surfaces under dry friction and oil lubrication conditions. The results indicate that compared to the non-textured surface, the textured surface exhibits a lower and more stable friction coefficient. Additionally, surface texturing mitigates wear by trapping materials such as wear debris. The circular texture with a staggered arrangement among single textures demonstrates the most effective friction-reducing performance. Furthermore, multi-scale composite textures, through the reasonable combination of different texture shapes, enhance the synergistic effect, leading to improved friction reduction and lubrication performance.