Investigation on elevated-temperature wear performance and wear failure mechanism of a tungsten-system hot-working die steel

Abstract

Abstract A pin-on-disk high temperature wear tests under 50–150 N and 50, 100 r min−1 at 400 °C–600 °C were performed for a typical tungsten-system hot-working die steel (AISI H21). The results demonstrated that H21 steel presented different wear behavior and wear resistance under various sliding conditions at 400 °C–600 °C. In most cases at 400 °C–500 °C, H21 steel possessed good wear resistance. However, regardless of sliding speed, the wear performance of H21 steel started to deteriorate under 150 N at 500 °C, and totally deteriorated at 600 °C, exhibiting extremely poor wear resistance. A particular wear failure mechanism was found to be brittle-induced wear failure.