飞秒激光加工织构及织构对磨损的影响研究

发布时间：2018-01-15 00:23

本文关键词：飞秒激光加工织构及织构对磨损的影响研究　出处：《激光与红外》2017年10期 　论文类型：期刊论文

【摘要】：采用自主搭建的飞秒激光平台,选用不同激光参数在铍青铜材质表面加工微凹坑织构,研究激光功率、激光脉冲数对织构直径和深度的影响规律;并采用摩擦磨损试验机销、盘摩擦副开展牙轮钻头滑动轴承模拟工况下的单元摩擦学实验,分析表面织构对滑动轴承润滑及摩擦学性能的影响。研究结果表明,随激光功率增加,织构直径逐渐增大,而织构深度则有相反的变化规律;激光脉冲数对织构直径无明显影响,织构深度则随脉冲数增加逐渐增大。此外,合理直径织构能有效减少牙轮钻头滑动轴承表面摩擦磨损,且随织构直径增加,摩擦副表面摩擦系数和磨损量呈现出先减小后增大的变化规律。
[Abstract]:Using the femtosecond laser platform built by ourselves and using different laser parameters to process the micro-pit texture on the surface of beryllium bronze, the influence of laser power and the number of laser pulses on the texture diameter and depth was studied. The friction and wear testing machine pin and disc friction pair were used to carry out the unit tribological experiment of roller bit sliding bearing under simulated working conditions. The effect of surface texture on lubrication and tribological properties of journal bearing was analyzed. The results show that the effect of surface texture on lubrication and tribological properties of journal bearing is analyzed. With the increase of laser power, the diameter of texture increases gradually, and the depth of texture changes in reverse. The laser pulse number has no obvious effect on the texture diameter, and the texture depth increases gradually with the increase of the pulse number. In addition, reasonable diameter texture can effectively reduce the friction and wear on the surface of roller bit sliding bearing and increase with the increase of texture diameter. The friction coefficient and wear amount of the friction pair surface show the law of decreasing first and then increasing.
【作者单位】：西南石油大学机电工程学院;
【基金】：国家自然科学基金青年科学基金项目(No.51505397) 四川省学术和技术带头人培养基金项目资助
【分类号】：TH117.1;TN249
【正文快照】： 1引言摩擦磨损不仅影响了机械系统的工作性能,且不当的磨损将加速机械零部件失效,继而缩短机械系统的使用寿命,因此,如何减小机械零部件表面的摩擦磨损成为摩擦学工作者的研究重点。仿生表面织构技术作为一种有效的润滑减磨方法,自被汉密尔顿提出以来[1],引起了研究人员的极大

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