TC4钛合金激光表面微织构的高温摩擦磨损性能研究  

High Temperature Friction and Wear Properties of Laser Surface Texturing of TC4 Titanium Alloys

作　　者：徐家乐 谭文胜[1] 胡增荣 王松涛 周建忠[3] Xu Jiale;Tan Wensheng;Hu Zengrong;Wang Songtao;Zhou Jianzhong(Department of Intelligent Equipment,Changzhou College of Information Technology,Changzhou 213164,Jiangsu,China;School of Urban Rail Transportation,Soochow University,Suzhou 215131,Jiangsu,China;School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China)

机构地区：[1]常州信息职业技术学院智能装备学院,江苏常州213164 [2]苏州大学轨道交通学院,江苏苏州215131 [3]江苏大学机械工程学院,江苏镇江212013

出　　处：《激光与光电子学进展》2022年第11期291-297,共7页Laser & Optoelectronics Progress

基　　金：江苏省高校自然科学研究面上项目(20KJB460016);常州信息职业技术学院校级科研课题资助项目(CXKZ201906Y);江苏省高职院校青年教师企业实践培训资助项目(2020QYSJ129);常州信息职业技术学院2020年度校级科研平台项目(KYPT202003Z);常州市科技计划项目(CJ20210034)。

摘　　要：采用激光微织构技术,在钛合金表面上制备了圆形微凹坑,采用HT-1000型高温摩擦磨损试验机考察了微织构试样在常温和高温下的摩擦学性能,通过对摩擦系数、磨损量、磨痕三维轮廓和磨痕形貌的分析,探讨了高温环境对微织构试样耐磨性能和磨损机理的影响。结果表明:激光微织构试样在常温和高温磨损环境下的摩擦学性能均优于钛合金基体;在高温磨损条件下,微织构试样表现出更低的摩擦系数(0.27)、更小的磨损量(1.26 mg)以及更窄更浅的磨痕轮廓;微织构试样的磨损机制从常温下的磨粒磨损和轻微氧化磨损转为高温下的严重氧化磨损。由于微凹坑的磨屑收集特性及微织构表面在摩擦载荷的作用下可形成连续致密的光滑摩擦氧化物层,因此微织构试样表现出更好的高温耐磨性能。The circular micropits are prepared on the surface of titanium alloys by the laser surface texturing technology.The tribological properties of microtextured samples at room and high temperatures are investigated by the HT1000 high temperature friction and wear tester.The effect of high temperature environment on the wear resistance and wear mechanism of microtextured samples is discussed by analyzing the friction coefficient,wear amount,threedimensional profile and morphology of wear marks.The results show that the tribological properties of laser textured samples are better than those of titanium alloys at room temperature and high temperature.Under the high temperature wear conditions,the microtextured samples show a lower friction coefficient(0.27),smaller wear amount(1.26 mg),and narrower and shallower wear scar profiles.The wear mechanism of the microtextured specimens changes from abrasive wear and mild oxidation wear at room temperature to severe oxidation wear at high temperature.The microtextured specimens show better wear resistance at high temperature due to the debris collection characteristics of micropits and the formation of continuous and compact smooth friction oxide layers on the microtextured surface under the action of friction loads.

关 键 词：激光光学 激光微织构 TC4钛合金 高温摩擦磨损 磨损机制 

分 类 号：TG146[一般工业技术—材料科学与工程]