Liquid-Phase Laser Micro-Dimple Texturing of YG8 Cemented Carbide Tools: Optimization, Wear Mechanism, and Cutting Performance

Abstract

Cemented carbide is extensively applied in cutting tools. Surface laser micro-texturing alleviates tool surface wear and boosts cutting performance. This work adopts response surface methodology to investigate circular micro-texture parameters (diameter, spacing, offset) of YG8 carbide tools with average friction coefficient as the response, constructing a quadratic regression model to acquire optimal texture parameters: diameter 0.46 mm, spacing 0.93 mm, offset 0.31 mm. Friction tests reveal texture parameters greatly affect tribological properties, and the wear mitigation mechanism of optimized textures is analyzed. Turning experiments compare plain tools, air-ablation and liquid-phase laser textured tools. Cutting force and temperature models for smooth and liquid-phase textured cutters are built and validated. Results show air-textured tools reduce cutting force by 26.35% and average temperature by 13.42%, while liquid-phase counterparts achieve 30.07% force drop and 20.73% temperature reduction. Genetic algorithm optimization yields liquid-texture force attenuation coefficient 0.3646 and temperature coefficient 0.2961, offering theoretical support for high-performance textured cutter design.