飞秒激光制备不锈钢表面微型构造及其摩擦性能研究

发布时间：2018-09-14 12:34

【摘要】：采用波长为1 030nm的飞秒激光在0Cr18Ni9不锈钢表面上制备出规则的微型构造,采用HT-500高温摩擦磨损机对其进行干摩擦实验研究,利用彩色3D激光扫描显微镜与SEM观察微孔表面形貌以及测量其深度。研究结果表明,飞秒激光能够制备出质量较好的微孔,在同等条件下的干摩擦磨损实验中,微型构造的材料表面比未加工的材料摩擦系数要小。在载荷为5N,滑动速度为0.075 0,0.018 7m/s条件下,面积比率约为10%的微型构造表面摩擦系数比未处理表面摩擦系数减小15.8%、40.4%。在载荷为9N,滑动速度为0.075 0,0.018 7m/s条件下,面积比率约为10%的微型构造表面摩擦系数比未处理表面摩擦系数减小19.3%与24.7%。不同尺寸微型构造表面摩擦磨损研究发现,微孔直径为60μm的表面摩擦系数要比直径为28μm的表面要低,当载荷分别为5N和9N时,面积比率约为10%和20%的微型构造表面摩擦系数最低,磨损机制主要为粘着磨损和磨粒磨损。
[Abstract]:A regular micro structure was prepared on the surface of 0Cr18Ni9 stainless steel by femtosecond laser with wavelength of 1 030nm. The dry friction experiment was carried out by HT-500 high temperature friction and wear machine. The surface morphology and depth of micropores were observed by color 3D laser scanning microscope and SEM. The results show that the femtosecond laser can produce fine micropores. In the dry friction and wear experiments under the same conditions, the friction coefficient of the micro-structured materials is smaller than that of the unmachined materials. When the load is 5N and the sliding velocity is 0.075 ~ 0.018 7m/s, the friction coefficient of the micro-structure with an area ratio of about 10% is reduced by 15.8% and 40.4% than that of the untreated surface. When the load is 9N and the sliding velocity is 0.075 ~ 0.018 7m/s, the friction coefficient of the micro-structure with an area ratio of about 10% is 19.3% and 24.7% lower than that of the untreated surface. It is found that the friction coefficient of the surface with the diameter of 60 渭 m is lower than that of the surface with the diameter of 28 渭 m. When the load is 5N and 9N, respectively, The friction coefficient of microstructures with area ratio of about 10% and 20% is the lowest, and the wear mechanism is mainly adhesive wear and abrasive wear.
【作者单位】：广东省微纳光子功能材料与器件重点实验室;
【基金】：2013广东省研究生教育创新计划资助项目(项目编号:2013JDXM23) 广东省省级科技计划资助项目(项目编号:2013B090600045)
【分类号】：TG665;TG142.71

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