Factors affecting the progressive development of wear-protective oxides on iron-base alloys during sliding at elevated temperatures

摘要: Abstract The friction behaviour of two commercial Fe-12%Cr alloys during reciprocating sliding in air at 100–400 °C has been studied and a model is proposed to account for the changes observed. After relatively high initial values, associated with metal-metal contact, decreases progressively time, reaching minimum value that very reproducible given set conditions after short period, length which increasing temperature. Subsequently increases somewhat attains steady maintained throughout remainder run. This can be correlated oxide-oxide contact only. decrease early stages progressive development adherent compacted oxide regions. these assumes regions are uniform thickness, volume rate production proportional remaining area bare metal surface hence growth follows an exponential decay law. relates coefficient time several interfacial metal, metal-oxide parameters. There close correlation between practice 400 300 °C. However, less exact lower temperatures. These results considered light possible mechanisms generation wear.