摘要
利用SRV-4摩擦磨损试验机对M50轴承钢进行了滑动摩擦试验,通过改变试验环境温度与加载应力探究了M50钢的高温摩擦磨损性能。采用激光共聚焦显微镜(LSCM)、扫描电子显微镜(SEM)和能谱仪(EDS)观察高温高应力下磨损对钢的影响。研究发现,试验环境温度200℃与210 MPa以上摩擦剪力的共同作用下,大尺寸MC型碳化物表层基体粘着剥落,MC型碳化物破碎、迁移,加剧磨损。试验环境温度200℃粘着磨损加剧且磨损面形成的(Cr, Fe)_(2)O_(3)氧化膜厚度不足导致粘着磨损量达到最大值。试验环境温度升高至315℃,氧化膜趋于连续且膜厚增加,粘着磨损减弱,接触应力2.05 GPa时摩擦因数相较于室温下降27%。
The sliding friction test of M50 bearing steel was carried out by SRV-4 friction and wear testing machine. The high temperature friction and wear performance of M50 steel was explored by changing the test environment temperature and loading stress. Laser scanning confocal microscope(LSCM), scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS) were used to observe the effect of wear on steel under high temperature and high stress. It is found that under the joint action of the test environment temperature of 200 ℃ and the friction shear force above 210 MPa, the surface matrix of large-size MC carbides adhered to flake, and the MC carbides were broken and migrated, and the wear was aggravated. The experimental environment temperature is 200 ℃, the adhesion wear increases and the thickness of(Cr, Fe)_(2)O_(3)oxide film on the wear surface is insufficient, which results in the maximum adhesion wear. When the ambient temperature was raised to 315 ℃, the oxide film tended to be continuous and the film thickness increased, the adhesion wear weakened, and the friction coefficient decreased 27% when the contact stress is 2.05 GPa compared with room temperature.
作者
林犀灵
杨卯生
周晓龙
LIN Xiling;YANG Maosheng;ZHOU Xiaolong(College of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute for Special Steel,Central Iron and Steel Research Institute,Beijing 100081,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2023年第3期332-346,共15页
Journal of Iron and Steel Research
关键词
M50钢
高温氧化
摩擦因数
粘着磨损
碳化物破碎
M50 steel
high temperature oxidation
coefficient of friction
adhesive wear
carbide crushing
