摘要
利用CBZ-1摩擦磨损试验机对超高分子量聚乙烯(UHMWPE)在老化状态下的干摩擦性能进行分析与研究.考察了试样在不同老化状态的硬度及不同滑动速度下所产生的摩擦热,利用扫描电镜(SEM)观察了试样的磨损形貌,通过表面轮廓仪分析对偶件的表面粗糙度,探讨了不同老化状态试样的磨损机理.结果表明:老化对不同分子量UHMWPE干摩擦性能产生了明显的影响;随着老化温度的升高及老化时间的延长,UHMWPE干摩擦性能逐渐恶化;在一定的老化状态下,高转速所产生的摩擦热会进一步加剧UHMWPE摩擦性能的恶化;在40℃,60℃以及120 h,240 h的老化条件下UHMWPE磨损机制以疲劳磨损与磨粒磨损为主.在80℃以及480 h,600 h的老化条件下,磨损机制主要是黏着磨损与疲劳磨损.
Wear and friction tests were conducted by a CBZ-1 tester under dry sliding to analyze and research the tribological properties of aged UHMWPE. The hardness of samples under different aged conditions and friction heat generated at different sliding velocities were examined,worn surfaces of samples were observed by scanning electric microscopy,the surface roughness of the coupler was analyzed by interference profilometer,and friction mechanisms of UHMWPE under different aged condition were investigated. The results show aging had an obvious effect on the dry sliding performance of different molecular weight UHMWPE. The friction performance of UHMWPE gradually deteriorated as the aged time and aged temperature increased. The friction heat generated at high velocity further aggravated the friction performance of UHMWPE under certain aged conditions. The wear mechanisms of UHMWPE were mainly fatigue wear and abrasive wear when the aged temperature were 40 ℃,60 ℃ and the aged durations were120 h and 240 h. At 80 ℃ and 480 h,600 h of aged condition,the main wear mechanisms were adhesive wear and fatigue wear.
作者
常铁
袁成清
郭智威
CHANG Tie;YUAN Chengqing;GUO Zhiwei(School of Energy and Power Engineering,Wuhan University of Technology,Hubei Wuhan 430063,China;Reliability Engineering Institute,National Engineering Research Center for Water Transportation Safety,Hubei Wuhan 430063,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2018年第4期468-477,共10页
Tribology
基金
国家自然科学基金项目(51509195)资助~~
