表面织构参数对渗氮304钢在纳米微粒添加剂润滑油作用下摩擦特性的影响  

Tribological Properties of Surface Texture Parameters on Nitrided 304 Steel with Nanoparticles as Additive Lubricants

作　　者：邱兆岭 陈文刚[1] 环鹏程 李创业[1] QIU Zhaoling;CHEN Wengang;HUAN Pengcheng;LI Chuangye(School of Mechanical and Transportation,Southwest Forestry University,Kunming 650224)

机构地区：[1]西南林业大学机械与交通学院,昆明650224

出　　处：《材料导报》2018年第18期3217-3222,3229,共7页Materials Reports

基　　金：云南省应用基础研究面上项目(2010CD067)

摘　　要：采用激光打标机在304钢基体表面刻蚀出孔径与间距数值相等的均布微坑;将激光织构的试样放入渗氮炉中进行表面渗氮处理;采用表面修饰剂对质量比为1∶1的SiO_2和TiO_2混合纳米微粒进行表面修饰后,将其(3%,质量分数)加入到基础油中,使用摩擦磨损试验机对其进行摩擦磨损实验。系统地对试样复合改性表面硬度、表面化学成分、表面形貌及摩擦磨损形貌进行研究。实验结果表明:表面织构参数影响304钢的摩擦学性能,其摩擦因数随孔径及间距的增大而减小,在摩擦过程中,织构微坑能够起到收集磨屑、存储润滑剂、降低磨损的作用;表面经盐浴渗氮处理后,其显微硬度由222.53HV0.1提高到573.63HV0.1,硬度显著提升;纳米微粒作为润滑油添加剂不仅能够产生微轴承作用将部分滑动摩擦转变为滚动摩擦,同时还能生成一层润滑保护膜。复合润滑结构与含有纳米添加剂的润滑油配合能够显著地降低磨损,使材料具有优异的摩擦学性能。A micro pit morphology with equal aperture and spacing was etched on the surface of 304 steel by laser device.The laser textured sample was placed in the nitriding furnace for surface nitriding treatment.The surfactant was used to modify SiO 2 and TiO 2 with mass ratio of 1∶1 which were added to base oil with 3%mass fraction.The friction and wear experiments of the composite modification surface were tested by friction and wear testing machine.The micro-hardness,chemical composition,morphology and wear morphology of samples were studied systematically.The results showed that the tribological properties of 304 steel were affec-ted by surface texture parameters and the friction factor decreased with the increase of pore diameter and spacing.During the process of friction,the micro pits could play the role of collecting debris,storing lubricant and reducing wear.The micro hardness of the composite modification surface increased from 222.53HV 0.1 to 573.63HV 0.1,and the hardness has been significantly improved.The nanoparticle added to lubricating oil cooperate with the composite modification surface had better tribological property.The combination of compound lubrication structure and lubricating oil containing nano additives could significantly reduce wear and had excellent tribological properties.

关 键 词：摩擦因数 304钢 纳米微粒 盐浴渗氮 激光织构 

分 类 号：TG174.4[金属学及工艺—金属表面处理]