Ni Jing, Huang Xianle, Zhang Zhen, Li Zuji, Lv Binjie, Gao Xinyu
School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
Materials (Basel). 2024 Jul 11;17(14):3423. doi: 10.3390/ma17143423.
Surface micro-texture has been shown to enhance wettability and reduce wear on cutting tools. However, there is limited research on how laser parameters impact the dimensional accuracy of surface texture and its wettability. This study focuses on producing arrayed groove textures on WC/Co cemented carbide surfaces using Nd: YAG laser, evaluating the effect of the laser parameters on surface topography and texture accuracy through microscopic observation and simulation. The results indicate that, with laser parameters such as a number of passes less than 5, approximately 16 W power, scanning speed of 100-150 mm/s, and pulse frequency of 30 kHz, the error between the groove width and laser spot diameter was 4.7%. Additionally, the study explores the impact of the groove texture on surface wettability using the solid droplet method and XPS analysis. Comparative experiments reveal that increased surface roughness enhanced oleophobicity, with surfaces exhibiting high texture accuracy and integrity showing improved oleophobic and spreading properties. Thus, the precise regulation of laser processes is crucial for maintaining surface texture integrity and enhancing surface wettability.
表面微纹理已被证明可提高润湿性并减少切削刀具的磨损。然而，关于激光参数如何影响表面纹理的尺寸精度及其润湿性的研究有限。本研究聚焦于使用Nd:YAG激光在WC/Co硬质合金表面制备阵列沟槽纹理，通过微观观察和模拟评估激光参数对表面形貌和纹理精度的影响。结果表明，当激光参数为扫描次数小于5次、功率约16W、扫描速度为100 - 150mm/s以及脉冲频率为30kHz时，沟槽宽度与激光光斑直径之间的误差为4.7%。此外，该研究使用固体液滴法和XPS分析探究了沟槽纹理对表面润湿性的影响。对比实验表明，表面粗糙度增加增强了疏油性，具有高纹理精度和完整性的表面表现出更好的疏油和铺展性能。因此，精确调控激光工艺对于保持表面纹理完整性和提高表面润湿性至关重要。
