应用激光, 2018, 38 (6): 981, 网络出版: 2019-01-27   

皮秒激光制备表面微结构对摩擦性能的影响

Effect of Picosecond Laser Surface Texturing on the Friction Properties
张瑄珺 1,2,3,4,*沈佳骏 1,2王健超 1,2,3,4
作者单位
1 上海市激光技术研究所,上海 200223
2 上海市激光束精细加工重点实验室,上海 200233
3 上海激光直接物标溯源工程技术研究中心,上海 200233
4 上海激光智能制造工程技术研究中心,上海 200233
摘要
采用皮秒激光在不锈钢表面加工形成了6种不同规则形态的微结构,这些微结构微观形貌呈现微米级类波纹状突起,突起表面分布有一个个纳米级的小微坑。加工区域元素的组成成分基本和基底一样,含量也接近,只有C元素含量有所增加,Fe元素含量有所降低。织构区域的摩擦系数普遍都比无织构区域小,无织构的不锈钢薄板摩擦系数在0.8~0.9之间,而织构过的表面摩擦系数明显降低,在0.1~0.2之间。摩擦系数均呈现出先爬升后稳定的变化,但织构表面相对未织构表面摩擦系数达到稳定状态的时间较短。织构表面摩擦系数在4 000~7 500 s时显著升高,表面微结构的减磨作用贡献结束。织构表面磨斑均比原始表面的磨斑宽,当摩擦方向垂直于织构表面,具有更好的减磨作用。
Abstract
The picosecond laser is used to form six different regular morphology microstructures on the surface of the stainless steel. These microstructures have micro-scale corrugated protrusions, and the surface of the protrusions is distributed with small micro-pits of nanometer scale. The elements composition of the processing area is basically the same as that of the substrate, and the content is also close. The content of C element increases and the content of Fe element decreases. The friction coefficient of the textured area is generally smaller than that of the non-textured area. The friction coefficient of the non-textured stainless steel sheet is between 0.8 and 0.9, while the textured surface friction coefficient is significantly reduced, and the friction coefficient is reduced to 0.1 to 0.2. The friction coefficient shows a stable change after climbing first, but the time when the textured surface reaches the steady state relative to the un-textured surface is shorter. The textured surface friction coefficient increases significantly at 4 000~7 500 s, and the contribution of the surface microstructure is ended. The wear scars of textured surface are wider than that of the original surface. When the rubbing direction is perpendicular to the texture, it has a better anti-wear effect.

张瑄珺, 沈佳骏, 王健超. 皮秒激光制备表面微结构对摩擦性能的影响[J]. 应用激光, 2018, 38(6): 981. Zhang Xuanjun, Shen Jiajun, Wang Jianchao. Effect of Picosecond Laser Surface Texturing on the Friction Properties[J]. APPLIED LASER, 2018, 38(6): 981.

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