载荷对Cr4Mo4V轴承钢高温干摩擦特性的影响  

Effect of Load on High Temperature Dry Friction Characteristics of Cr4Mo4V Bearing Steel

作　　者：刘建 郭浩[1] 王浩[1] 赵孟晨[1] 王培 LIU Jian;GUO Hao;WANG Hao;ZHAO Meng-chen;WANG Pei(Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023,China;School of Materials Science and Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023 [3]河南工业大学材料科学与工程学院,河南郑州450001

出　　处：《材料保护》2023年第1期44-49,57,共7页Materials Protection

基　　金：河南省高性能轴承技术重点实验室开放课题(2020ZCKF03)资助。

摘　　要：为探究瞬时干摩擦条件下Cr4Mo4V轴承钢的磨损机理,采用氮化硅球与Cr4Mo4V钢盘摩擦副,探究了在环境温度300℃、速度0.3 m/s、滑动干摩擦条件下,载荷变化对Cr4Mo4V轴承钢摩擦特性的影响规律。结果表明:载荷在1.2~2.4 GPa范围内增加时,Cr4Mo4V轴承钢的摩擦系数从0.89降低为0.42,但磨损率从2.05×10^(-6)mm^(3)/(N·m)增加到2.68×10^(-6)mm^(3)/(N·m)。磨损表面发生氧化反应,不同载荷条件下产生的氧化物类型不同。Cr4Mo4V钢的磨损机制主要为氧化磨损及黏着磨损。In order to explore the wear mechanism of Cr4Mo4V bearing steel under the condition of instantaneous dry friction,the silicon nitride ball and Cr4Mo4V steel disc friction pair were used to explore the influence of load changes on the friction characteristics of Cr4Mo4V bearing steel under the conditions of an ambient temperature of 300℃,a speed of 0.3 m/s and a sliding dry friction.Results showed that when the load increased in the range of 1.2~2.4 GPa,the friction coefficient of Cr4Mo4V bearing steel decreased from 0.89 to 0.42,while the wear rate increased from 2.05×10^(-6)mm^(3)/(N·m)to 2.68×10^(-6)mm^(3)/(N·m).Oxidation reaction occurred on the worn surface,and the types of oxides produced under different load conditions were different.Besides,the main wear mechanisms of Cr4Mo4V were oxidation wear and adhesion wear.

关 键 词：载荷 Cr4Mo4V轴承钢 干摩擦 磨损机制 

分 类 号：TG580.68[金属学及工艺—金属切削加工及机床]