中文摘要：

采用微机控制磨粒磨损试验机研究丁腈橡胶（NBR）和氟橡胶（FKM）与45^#钢配副在干摩擦条件下的摩擦磨损行为,并对NBR和FKM的磨痕表面形貌、元素含量和表面官能团变化进行分析。结果表明：当转速较低时,NBR和FKM均以磨粒磨损（微切削）为主;当转速大于200 r·min^-1时,NBR磨痕表面出现胶合现象,表现为粘着磨损,FKM的耐磨性能优于NBR。NBR和FKM的磨粒磨损机理相似,主要物理过程为宏观分层剥落;当转速较高时,橡胶/钢副接触面发生了粘着转移,在钢环表面形成了转移膜。在干摩擦过程中NBR和FKM的分子链发生断裂形成大分子自由基,大分子自由基异构化并发生氧化反应。

英文摘要：

In this study,the wear mechanism of NBR and FKM against 45^# steal surface under dry sliding was investigated by using microcomputer controlled abrasion testing machine.The change of surface morphology,element content and functional group on the abraded surface of NBR and FKM before and after wear was analyzed.The results showed that,the wear mechanism of NBR and FKM were mainly abrasive wear（micro cutting） at low rotation rate,and when the rotation rate was higher than 200 r · min^-1,scuffing phenomenon on the worn surface of NBR began to appear,indicating that the wear mechanism was adhesive wear.It was found that the wear resistance of FKM was better than that of NBR.The abrasive wear mechanism for NBR and FKM was similar,and the main physical processes of wear were the macro delamination.At high rotation rate,there was an adhesive transfer between rubber/steel contact surface,and transfer film formed on the steel surface.In the dry friction process,molecular chains of NBR and FKM were broken,the macromolecular radicals were formed and isomerized,and oxidation reactions occurred.