Effects of Temperature and Sliding Distance on the Wear Behavior of Austenitic Fe-Cr-C-Si Hardfacing Alloy

Effects of temperature and sliding distance on the metal-to-metal wear behavior of austenitic Fe-20Cr-1.7C-1Si hardfacing alloy were investigated in an air at the temperature range of 25–450°C. The applied contact stress was 55 Mpa and the sliding distance was 18 m. In the temperature range from 25°C to 200°C, the weight losses linearly increased with increasing sliding distance. In the meanwhile, the weight loss parabolically increased with increasing sliding distance up to 18 m at 300°C. At 450°C, the weight loss drastically increased from the beginning of the wear test and became almost saturated with further increasing sliding distance over 3.6 m. The initial friction coefficient was not changed with temperature up to 300°C. However, at 450°C, the initial friction coefficient increased abruptly. It was considered to be due to the increasing tendency of adhesive bonding between the two self-mating specimens. Under 200°C, the steady state friction coefficient was not changed significantly. Above 300°C, the steady state friction coefficient decreased due to the oxide layers, formed on the worn surfaces during wear.