不锈钢光纤激光毛化及其摩擦性能-表面技术.PDF

摇 摇 摇 表面技术 第44卷摇 第1期 ·96 · SURFACE TECHNOLOGY 摇 2015年01月 試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試 不锈钢光纤激光毛化及其摩擦性能 符永宏,王浩,杨烨刚,符昊,华希俊 (江苏大学 机械工程学院,江苏 镇江212013) 摘摇 要: 目的摇 研究光纤激光毛化应用于模具表面,改善其摩擦特性的可行性。 方法摇 采用单因素变化 法,研究激光功率、脉宽、频率、离焦量对毛化形貌的影响规律,分析毛化区域的显微硬度,并对不同形貌 的毛化试样和光滑试样的摩擦性能进行对比。 结果摇 匹配特定的参数,可获得火山口形貌或球冠状形 貌。 毛化区域的硬度相对基材提高显著,最大提高了近4 倍。 同时,在模拟冷冲压拉深模具低速重载工 况的摩擦实验中,毛化试样的摩擦系数比光滑试样大,同时随着毛化点直径、间距的增大,摩擦系数相应 减小。 结论摇 激光毛化技术可对材料表面进行改形改性,能够用于优化模具表面摩擦特性。 关键词:光纤激光毛化;毛化形貌;显微硬度;摩擦特性 中图分类号:TG156.99;TH117.1摇 摇 摇 文献标识码:A摇 摇 摇 文章编号:1001鄄3660(2015)01鄄0096鄄06 Experiment Research on Fiber Laser Texturing of Stainless Steel and Its Friction Properties FU Yong鄄hong,WANGHao,YANG Ye鄄gang,FUHao,HUA Xi鄄jun (School of Mechanical Engineering,Jiangsu University,Zhenjiang212013,China) ABSTRACT:Objective To investigate thefeasibility of fiber laser texturing on the mold surface andthe improvement of thefric鄄 tion properties. Methods Using singlefactorvariationmethod,theinfluencinglawsof thepower,pulsewidth,frequency,andde鄄 focus amount on different textureswere investigated,and the hardness of the textured topography was also measured. Meanwhile, the friction properties of stainlesssteel sampleswithdifferent surfacetexturesdisposedby lasertexturingaswell assmooth samples were comparatively investigated. Results It showedthat textures such ascrater shape and sombrero shapetexturetopography could be obtained by certain laser parameters and supplementary parameters. The hardness of the textured points was significantly in鄄 creased,and the maximum valuewas nearly four times the hardnes