激光微织构固体润滑表面高温摩擦学性能研究  

Tribological Properties of the Laser Micro-texture Surface Filled with Solid Lubricant at Elevated Temperature

作　　者：华希俊[1] 孙建国[1] 张培耘[1] 丁积霖 郝静文[1] 刘凯[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《表面技术》2016年第6期112-118,共7页Surface Technology

基　　金：国家自然科学基金(51375211;51175233);江苏省工业支撑项目(BE2014115)~~

摘　　要：目的研究微织构纳米固体润滑剂及碳纳米管(CNTs)添加剂对微织构表面高温润滑性能的影响。方法采用YLP-HP-1-100-100-100型光纤激光器在Cr4Mo4V高温轴承钢表面进行织构化处理,并填充二硫化钼(MoS_2)-聚酰亚胺(PI)和不同碳纳米管添加含量的MoS_2-PI-CNTs复合固体润滑剂。在环-盘接触的MMU-10G高温摩擦磨损试验机上进行了环境温度从室温到400℃的滑动摩擦性能试验。结果填充含纳米MoS_2的复合固体润滑剂的微织构表面的摩擦系数比填充含相同含量微米MoS_2的低35%左右。微织构纳米MoS_2-PI自润滑表面摩擦系数随碳纳米管含量的增加先减小后增大,当碳纳米管质量分数为6%时,其摩擦系数最小,且比无碳纳米管的低37%左右。在MoS_2-PI纳米复合润滑剂中添加6%碳纳米管后,MoS_2-PI-CNTs纳米复合润滑剂具有更高的使用温度和更低的摩擦系数。结论纳米Mo S2的润滑效果优于微米MoS_2,碳纳米管有利于提高Mo S2-PI复合固体润滑剂的耐热性能和润滑减摩性能。Objective To research the effect of micro texture nano lubricant and the addition of carbon nanotubes（CNTs） on micro texture composite lubricant at high temperature. Methods 4Cr4Mo4 V high temperature bearing steel was textured by YLP-HP-1-100-100-100 laser and composite lubricant ofpolyimide（PI） and molybdenum disulfide（MoS2）, and MoS2-PI-CNTs with different contents of CNTs were filled in the micro-dimples. Sliding friction performance of composite lubricant was investigated by the high temperature friction and wear testing machine MMU-10 G using ring-plate area contact. Results The friction coefficient of nano MoS2-PI composite was lower compared to that of micron MoS2-PI composite lubricant. The friction coeffi-cient of micro textured surface filled with the nano MoS2-PI composite lubricant decreased before increasing with the increase of the contents of the carbon nanotube. MoS2-PI-CNTs nano-composite solid lubricant had a higher operation temperature and lower friction coefficient after addition of 6wt% carbon nanotubes（CNTs）. Conclusion The lubrication effect of nano MoS2 was better than that of micron MoS2, and CNTs were beneficial to improving the performance of heat resistance and lubrication antifriction.

关 键 词：激光织构 纳米复合固体润滑 碳纳米管 面接触 滑动摩擦 高温 

分 类 号：TG356.16[金属学及工艺—金属压力加工]