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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。
A regular micro structure was prepared on the surface of 0Cr18Ni9 stainless steel by using a femtosecond laser at a wavelength of 1030nm. The dry friction experiment was carried out on the 0Cr18Ni9 stainless steel by HT-500 high temperature friction and wear machine. The surface morphology of the micropore was observed by color 3D laser scanning microscope and SEM. Look and measure its depth. The results show that the femtosecond laser can produce better quality micropores, and under the same conditions of dry friction and wear experiments, the surface of the microstructured material is smaller than that of the unprocessed material. Under the load of 5N and the sliding velocity of 0.075 0,0.018 7m / s, the coefficient of friction of the microstructures with the area ratio of about 10% is 15.8% and 40.4% lower than that of the untreated surface. Under the condition of 9N load, 0.075 0 and 0.018 7m / s sliding velocity, the coefficient of friction of the microstructures with the area ratio of about 10% is reduced by 19.3% and 24.7% compared with that of the untreated surface. Friction and wear studies on microstructures of different sizes have found that the surface friction coefficient of a 60 μm pore diameter is lower than that of a surface of 28 μm diameter and the microstructure is about 10% and 20% when the loadings are 5 N and 9 N, respectively The lowest surface friction coefficient, wear mechanism is mainly adhesive wear and abrasive wear.