离合器用30CrMnSiA钢制动片和铜基粉末冶金摩擦片的温摩擦磨损性能分析

Thermal friction and wear performance analysis of 30CrMnSiA steel brake plate and copper-based powder metallurgy friction plate for clutch

采用MMU-10G摩擦磨损试验机测试室温至600℃温度范围内的30CrMnSiA钢制动片和铜基摩擦片的端面摩擦磨损性能,分析其摩擦因数和磨损量,重点分析轻、重磨损阶段不同的磨损机制。结果表明:随温度上升,制动片与摩擦片都发生了摩擦因数与磨损量上升,在温度升高到600℃时,制动片磨损量明显减小。在300℃的温度下,摩擦片为轻磨损阶段,磨损后形成光滑的表面,同时还生成了部分深度较小的犁沟结构,大块颗粒表层上形成了一些裂纹结构。摩擦片主要发生磨粒磨损,同时还有一定程度的氧化磨损。在500℃的温度下,摩擦片为重磨损阶段,磨损后摩擦片表层形成了更多数量的犁沟并且深度也更大,还有部分SiO2颗粒发生了脱落并形成凹坑,磨屑中形成了更多的Fe与Fe2O3颗粒,氧化磨损、磨粒磨损以及疲劳磨损等多种磨损形式共同存在。

The MMU-10G friction and wear testing machine was used to test the friction and wear properties of the end face of 30CrMnSiA steel brake plate and copper-based powder metallurgy friction plate in the temperature range of room temperature to 600 ℃. The friction coefficient and wear amount were analyzed,with emphasis on the different wear mechanisms in light and heavy wear stages. The results show that the friction coefficient and wear amount of brake plate and friction plate increase with the temperature rising, and the wear amount of brake plate decreases obviously when the temperature rises to 600 ℃. At the temperature of 300 ℃,the friction plate is in the light wear stage. A smooth wear surface is formed. At the same time,some furrow structures with smaller depth are formed,and some crack structures are formed on the surface layer of large particles. The friction plate is mainly worn by abrasive grains,and at the same time there is a certain degree of oxidation wear. At the temperature of 500 ℃,the friction plate is in the heavy wear stage. More and deeper furrows are formed on the surface layer of the friction plate. Some SiO2 particles fall off and form pits. More Fe and Fe2O3 particles are formed in the abrasive dust. The wear mechanisms are oxidation wear,abrasive wear and fatigue wear.