Rolling Contact Wear Property of Austempered Ductile Iron

Two austempered ductile irons (ADIs) and alloy wheel steel are matched with alloy rail steel and the rolling contact wear properties of these frictional pairs are investigated. The results show that the wear properties of two ADIs are improved significantly compared with the alloy wheel steel. The self lubricating capability of the ADI with low hardness, small and large quantity distributed graphite nodule is excellent, and the wear resistance of the corresponding frictional pair is the highest. The wear resistance of the ADI with high hardness, large and small quantity distributed graphite nodule is weak, and the self lubricating capability of the corresponding frictional pair is moderate. The alloy wheel steel is not self-lubricating, and hence the wear resistance of the corresponding frictional pair is the lowest.