一、概况 我国铁路车辆自1959年推广采用球墨铸铁轴瓦代替钢瓦以来,节约了大量有色金属,但由于球墨铸铁耐磨性差,同时由于车辆载重量不断增加和列车速度不断提高,产生了严重的轴瓦端磨问题。轴瓦大量磨损,轴领严重磨沟,大大增加了轴瓦修换率和轴 I. Overview China’s rail vehicles since 1959 to promote the use of ductile iron bearings instead of steel tile has saved a lot of non-ferrous metals, but due to poor wear resistance of ductile iron, while increasing the carrying capacity of vehicles and train speed continuously increased, resulting in serious Bearing end grinding problems. A large number of bearing wear, shaft serious grinding groove, greatly increasing the rate of shaft repair and shaft