周耀,郑凯雯,徐松松,冯绪琛,李岩.基于矩形面积法的激光表面织构润湿性研究[J].表面技术,2025,54(4):191-200.
ZHOU Yao,ZHENG Kaiwen,XU Songsong,FENG Xuchen,LI Yan.Wettability of Laser Surface Texture Based on Rectangular Area Method[J].Surface Technology,2025,54(4):191-200 |
| 基于矩形面积法的激光表面织构润湿性研究 |
| Wettability of Laser Surface Texture Based on Rectangular Area Method |
| 投稿时间：2024-04-10 修订日期：2024-09-05 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.04.015 |
| 中文关键词: 润湿性 激光技术 微织构 亲水性 表面粗糙因子 接触角 |
| 英文关键词:wettability laser technique micro texture hydrophilicity surface roughness factor contact angle |
| 基金项目:国家自然科学基金青年科学基金资助项目(51805463) |
| 作者 | 单位 |
| 周耀 | 烟台理工学院，山东 烟台 264005 |
| 郑凯雯 | 烟台大学 机电汽车工程学院，山东 烟台 264005 |
| 徐松松 | 烟台大学 机电汽车工程学院，山东 烟台 264005 |
| 冯绪琛 | 烟台大学 机电汽车工程学院，山东 烟台 264005 |
| 李岩 | 烟台大学 机电汽车工程学院，山东 烟台 264005 |
|
| Author | Institution |
| ZHOU Yao | Yantai Institute of Technology, Shandong Yantai 264005, China |
| ZHENG Kaiwen | School of Electrical and Mechanical Engineering, Yantai University, Shandong Yantai 264005, China |
| XU Songsong | School of Electrical and Mechanical Engineering, Yantai University, Shandong Yantai 264005, China |
| FENG Xuchen | School of Electrical and Mechanical Engineering, Yantai University, Shandong Yantai 264005, China |
| LI Yan | School of Electrical and Mechanical Engineering, Yantai University, Shandong Yantai 264005, China |
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| 中文摘要: |
| 目的 获取减摩性能优异的织构化表面，研究织构参数对润湿性的影响。方法 基于Wenzel模型提出了矩形面积法，设计了菱形、圆形和方形3种微坑织构。以菱形的对角线、圆形的直径和方形的边长为微坑尺寸，利用光纤激光器在316L不锈钢表面加工出微坑尺寸为0.1、0.2、0.4 mm，间距为0.1、0.2、0.4 mm的菱形、圆形、方形微坑织构，即3(尺寸)×3(间距)×3(形状)，共27组。采用悬滴法，使用接触角测量仪测量了光滑平面以及微坑织构表面的接触角。通过Wenzel模型计算得到其表面粗糙度因子。通过矩形面积法对不同微坑织构表面粗糙因子建立了不同的数学模型。基于该模型分析了织构形貌、尺寸和间距对表面粗糙因子的影响。对水滴接触角测试结果与矩形面积法模型预测值进行了定量分析，在矩形面积法理论中引入了修正因子K，建立了相关的回归方程(R2=0.997 5)，从而完善了粗糙度因子预测模型。结果 接触角测试所得织构化表面润湿性的变化趋势与矩形面积法分析的规律一致。当尺寸和形貌不变时，随着间距增大，润湿性随之减弱;在粗糙度系数相等的情况下，矩形包含的织构面积越大，润湿性越强;当尺寸与间距相同时，润湿性最强。在实验范围内，尺寸为0.1 mm、间距为0.4 mm的方形微坑织构的润湿性最强，其水滴接触角为30.6°。结论 矩形面积法对于预测织构化表面润湿性具有可行性，该方法可以减少测试量，用理论来优化织构化表面润湿性，为加工具备优异润湿性的织构化表面提供了参考依据和优化方法。 |
| 英文摘要: |
| To achieve textured surfaces with superior friction reduction properties, it is crucial to investigate the impact of laser surface texturing technology on wettability. Based on the wettability theory, the rectangular area method was proposed to analyze the relationship between different micro-pit textures and wettability. With this method, the variation of hydrophilic textured surface wettability was explored through the morphology, spacing, and size of micro-pits. The fiber laser was used to process diamond-shaped, round, and square micro-pit textures with different spacing of 0.1, 0.2, and 0.4 mm and dimensions of 0.1, 0.2, and 0.4 mm on the surface of the 316L stainless steel. The contact angles of the smooth stainless steel and the surface of the micro-pit texture were tested by a contact angle measuring instrument. The surface roughness factor was calculated by the Wenzel model. Through the theory of the rectangular area method, mathematical models were established for the surface roughness factors of different micro-pit textures. The the roughness factor was obtained with the rectangular area method by calculating the ratio of the actual contact area of the solid-liquid interface in the rectangle to the rectangular area. The wettability of the textured surface of the groove was analyzed by the rectangular area method. It was found that increasing the groove spacing resulted in a decrease in the roughness factor, an increase in the contact angle, and a weakening of the wettability. In addition, when the size of the micro-pit texture remained the same, the wettability decreased with the increase in spacing. When the roughness coefficient was the same, the larger the texture area in the rectangle, the stronger the wettability. When the size and spacing were equal, the wettability was the strongest. In the range of this experiment, the wettability of the square micro-pit texture with a dimension of 0.1 mm and a spacing of 0.4 mm was the strongest, and the contact angle was 30.6°. The trend analysis of textured surface changes obtained through contact angle testing aligned with the conclusions drawn from the proposed rectangular area method, confirming the feasibility of the rectangular area method. In order to verify the accuracy of the model, the test results of the contact angle were quantitatively analyzed with the predicted values of the model. The results showed that the roughness factor calculated by the rectangular area method was slightly lower than the roughness factor calculated by the actual contact angle. This might be due to the V-shaped cross-section of the micro-texture prepared by the fiber laser, and due to the presence of the recast layer, the interior of the micro-pit was not a smooth plane, which made the true area of the micro-pit texture greater than the theoretical area of the micro-pit texture. In addition, the tiny bumps inside the micro-pits were irregular and difficult to calculate. In order to more accurately calculate the roughness factor of different micro-pit textures, a correction factor K was introduced in the theory of the rectangular area method, and the relevant regression equation (R2=0.997 5) was established, thereby improving the roughness factor prediction model. The larger correlation index showed that the regression equation was accurate and effective. The method provides a reference basis and an optimization method for processing textured surfaces with excellent wettability. |
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