Investigating the wettability of the tool surface made of cemented carbide is of great significance to improve its working life and quality. The micropit array was processed on the surface of cemented carbide YT15 by a 1064 nm femtosecond pulse laser. Then, the optical microscope, the optical profilometer, and the contact angle measuring instrument were applied to measure the surface morphology and the surface contact angle of micropits. The influence of different laser parameters on surface morphology and the surface contact angle was studied. The geometric morphology model of the micropit was established. The influence of the morphology of micropits on the surface contact angle is analyzed based on the Wenzel theory. The results show that the radius and depth of micropits have a positive correlation with the average laser power and scanning times. As the spacing increases, the surface roughness factor and the surface contact angle decrease. There is a strong correlation between the characterization parameters kurtosis, skewness, and surface wettability in a 3D height parameter system. The smaller the kurtosis, the greater the skewness and the better the surface hydrophilicity.

中文翻译：

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研究在YT15上处理的飞秒激光的表面润湿性与形貌参数之间的相关性

研究硬质合金制成的工具表面的润湿性对于提高其使用寿命和质量具有重要意义。通过1064 nm飞秒脉冲激光在硬质合金YT15的表面上处理微坑阵列。然后，使用光学显微镜，光学轮廓仪和接触角测量仪来测量微坑的表面形态和表面接触角。研究了不同激光参数对表面形貌和表面接触角的影响。建立了微坑的几何形态模型。基于Wenzel理论，分析了微孔形态对表面接触角的影响。结果表明，微坑的半径和深度与平均激光功率和扫描时间呈正相关。随着间距的增加，表面粗糙度系数和表面接触角减小。在3D高度参数系统中，特征参数峰度，偏度和表面润湿性之间存在很强的相关性。峰度越小，偏度越大，表面亲水性越好。