材料期刊网

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。用立式万能摩擦实验机研究处理后试样的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。

Abstract：A low carbon steel plate was treated by surface mechanical attrition (SMAT) and its surface layer structure was analyzed by XRD and TEM.The result reveals that the surface layer has transformed into nanocrystalline structure. Its friction and wear have been studied compared with the untreated sample in dry sliding by a ring-on-disc tester. Wear behavior of surface nanocrystallization of low carbon steel was discussed by surface topography. The results show that the friction coefficient of the treated specimen is markedly decreased at applied loads between 15and 75N,and its wear mass loss is reduced under 15 and 55 N. The wear scars shows that the nanocrystalline layer may reduce the effect of fatigue wear and improve the friction and wear properties of low carbon steel.