激光表面织构形状参数对钛合金摩擦学性能的影响

发布时间：2018-07-01 07:48

本文选题：钛合金 + 激光表面织构　；参考：《中国表面工程》2017年04期

【摘要】：针对钛合金耐磨性差的问题,利用激光技术在TC4钛合金样品表面刻蚀出具有不同形状、间距和宽度(直径)的织构,基于CSM球盘式摩擦磨损试验机研究织构形状参数对钛合金在油润滑条件下摩擦学性能的影响。利用扫描电子显微镜(SEM)观察钛合金表面织构的微观形貌及磨痕形貌,利用白光干涉仪测试表面织构和磨痕的三维轮廓并通过计算得到磨损率。结果表明,网格型织构的摩擦因数比沟槽型和点阵型织构更小并且更稳定。织构的间距和宽度(直径)等形状参数显著影响钛合金的磨损性能。原始表面抛光钛合金样品磨损率高于表面织构处理后样品,原始钛合金样品的磨损机制主要为磨粒磨损和粘着磨损,而由于表面织构能起到收集磨屑,储存润滑油的作用,从而显著提升了钛合金的耐磨性。
[Abstract]:Aiming at the problem of poor wear resistance of titanium alloy, the texture with different shapes, spacing and width (diameter) was etched on the surface of TC4 titanium alloy by laser technique. The effect of texture shape parameters on the tribological properties of titanium alloy under oil lubrication was studied based on CSM ball disk friction and wear tester. Scanning electron microscope (SEM) was used to observe the microstructure and wear mark morphology of titanium alloy surface. The surface texture and three dimensional profile of wear mark were measured by white light interferometer and the wear rate was calculated. The results show that the friction coefficient of grid texture is smaller and more stable than that of grooves and lattice textures. The shape parameters such as spacing and width (diameter) of texture significantly affect the wear properties of titanium alloy. The wear rate of the original surface polished titanium alloy sample is higher than that of the surface texture treated sample. The wear mechanism of the original titanium alloy sample is mainly abrasive wear and adhesion wear, but because the surface texture can collect the debris and store the lubricating oil, the wear rate of the original surface polished titanium alloy sample is higher than that of the original titanium alloy sample after the surface texture treatment. Thus, the wear resistance of titanium alloy was improved significantly.
【作者单位】：中国地质大学(北京)工程技术学院;
【基金】：国家自然科学基金(U1537108) 北京市自然科学基金(3164049) 中央高校基本科研业务费(2652014054)~~
【分类号】：TG146.23;TG665

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