6061铝合金自润滑热锻条件下工件和模具摩擦磨损特性

Friction and wear characteristics of workpiece and die under self-lubricating hot forging condition of 6061 aluminum alloy

基于热锻条件,使用销-盘摩擦设备对6061热锻铝合金和H13钢基自润滑模具材料进行了高温对磨实验,通过电子探针和能谱仪分析了不同工况下工件和模具的磨损机理。结果表明,随着载荷的增加,工件和模具之间的摩擦因数与磨损率先降低后升高;随着转速的增加,工件和模具之间的摩擦因数增大,磨损率呈倍数增加;当载荷为12 N、转速为100 r·min^(-1)时,工件和模具之间的摩擦因数最小,其值为0.416,磨损率仅为24.591 mm 3·N^(-1)·m^(-1);随着转速和载荷的增加,工件和模具之间的粘着磨损加重并且逐渐出现磨粒磨损和氧化磨损。

Based on the hot forging conditions,pin-disk friction equipment was used to carry out high-temperature grinding experiments for 6061 hot-forged aluminum alloy and H13 steel-based self-lubricating die materials.The wear mechanisms of the workpiece and die under different working conditions were analyzed by electron probe and energy dispersive spectrum(EDS).The results show that with the increase of load,the friction factor and the wear rate between the workpiece and die first decrease and then increase.With the increase of rotation speed,the friction factor between the workpiece and die increases,and the wear rate increases manyfold.When the load is 12 N and the rotation speed is 100 r·min^(-1),the friction factor between workpiece and die is the smallest,the value is 0.416,and the wear rate is only 24.591 mm 3·N^(-1)·m^(-1).With the increase of rotation speed and load,the adhesive wear between the workpiece and die is aggravated,and the abrasive wear and oxidation wear gradually appear.