【摘要】 以某高速机车牵引齿轮材料42Cr Mo-17Cr Ni Mo6为研究对象,在销盘往复摩擦磨损试验机上研究接触载荷和相对滑动速度对其摩擦磨损性能的影响规律;利用扫描电子显微镜观察磨损表面形貌,进而分析材料摩擦磨损机制。结果表明:机车牵引齿轮材料的摩擦因数随载荷和速度的增加而降低并逐渐趋于稳定;机车牵引齿轮材料在摩擦条件下在磨损表面形成了犁沟,由于载荷和速度的增加使得犁沟间距变宽、摩擦表面更加平整,从而导致材料摩擦因数减低。更多还原

【Abstract】 Taking a certain high-speed locomotive traction gear material of 42 Cr Mo-17 Cr Ni Mo6 as the object,the influence of contact load and relative sliding velocity on its friction and wear properties was studied in the pin-on-disk reciprocating friction and wear tester. The worn surface morphologies were observed on a scanning electron microscope and the friction and wear mechanism of the locomotive gear materials was analyzed. Results show that the friction coefficient of locomotive traction gear materials is decreased and then becomes stable gradually with the increasing of normal contact load and relative velocity. The ploughs are generated on the worn surfaces of the locomotive traction gear materials. Due to the increase of the load and velocity,the space of ploughs is widened and the worn surface is smoothed,which causes the decreasing of the friction coefficient for the locomotive traction gear material.更多还原