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采用表面机械研磨的方法对低碳钢板材进行表面处理。经X射线衍射及透射电镜分析表明处理后的试样形成了一定厚度的具有纳米晶粒结构的表层。用立式万能摩擦试验机研究处理后试样在干摩擦条件下的摩擦磨损性能,通过分析其磨损表面形貌,探讨表面纳米化对低碳钢磨损行为的影响。结果表明在载荷为15～75 N条件下,其摩擦系数较未处理样品明显降低,当载荷为15～55 N时,其磨损量也较未处理样品降低。磨损表面形貌观察结果表明:表面纳米化处理能减弱低碳钢的疲劳磨损效应,提高材料的摩擦磨损性能。
The use of surface mechanical grinding method for low carbon steel sheet surface treatment. X-ray diffraction and transmission electron microscopy analysis showed that the treated sample formed a certain thickness of the surface layer with a nano-crystalline structure. The friction and wear properties of the treated samples under dry friction were studied by a universal universal friction tester. The effects of surface nanocrystallization on the wear behavior of mild steel were investigated by analyzing the wear surface morphology. The results show that under the condition of 15 ~ 75 N load, the friction coefficient is obviously lower than that of the untreated sample. When the load is 15 ~ 55 N, the wear loss is also lower than that of the untreated sample. The observation results of wear surface morphology show that the surface nanometer treatment can weaken the fatigue wear effect of mild steel and improve the friction and wear properties of the material.