高承载钢质摩擦副的滑动摩擦磨损性能实验研究

Experimental Research on Sliding Friction and Wear Performance of High-load Steel Friction Pairs

扭矩限制摩擦联轴器是用于传递和控制扭矩的轴系部件,被广泛应用于机械、造船、车辆等行业。所用摩擦片一般为钢或铸铁/有机摩擦材料,适用压力1~4 MPa且尺寸较大。在冶金设备中,运行工况需要大扭矩传递、紧凑结构、短间歇工作等,通用型扭矩限制摩擦联轴器不能满足其需求。使用耐磨材料38CrMoAl、42CrMo、65Mn,以65Mn为基体,形成配对摩擦副。采用万能摩擦磨损试验机、DM、SEM等检测手段,对不同配对摩擦副在高、低载荷下的磨损性能和机理进行研究。结果表明:在低载荷条件下,65Mn-65Mn配对磨损损失最少且磨损量高于另外两种配对1.1~1.6倍,耐磨性最优越,磨损机制为剥削和塑性变形;在高载荷磨损条件下,承受压力最大达到75 MPa,最佳配对材料为42CrMo-65Mn,磨损机制主要为犁削、凿削和少量塑性变形。

Torque limiting friction couplings are shaft components used to transmit and control torque,which are widely used in machinery,shipbuilding and vehicle industries.The friction plates used are generally steel or cast iron/organic friction materials,with applicable pressures between 1-4 MPa and larger sizes.In metallurgical equipment,operating conditions require large torque transmission,compact structure,short intermittent work,etc.,general-purpose torque limiting friction couplings cannot meet their needs.Using wear-resistant materials 38CrMoAl,42CrMo,65Mn,and 65Mn as the matrix,a pair of friction pairs were formed.Using universal friction and wear testing machine,DM,SEM and other testing methods were used to study the wear performance and mechanism of different pairs of friction pairs under high and low loads.The results show that under low load conditions,65Mn-65Mn pair has the least wear loss and the wear amount is 1.1-1.6 times higher than the other two pairs.The wear resistance is best.The wear mechanism is stripping and plastic deformation;under high load wear conditions,the maximum pressure is 75 MPa,and the best matching material is 42CrMo-65Mn,and the wear mechanism is mainly ploughing,chiseling and a small amount of plastic deformation.