Effects of Compositions and Oxide-incorporation on Tribological Properties of Heat-resisting Alloys at High Temperatures

摘要

Dry friction tests of heat-resisting alloys up to 900℃ were performed to evaluate the effects of compositions and oxide-incorporation. Observation and chemical analysis of sliding surfaces which compared their friction and wear properties, were also made. Co--base alloys tend to have lower friction and wear than Ni-base alloys. Furthermore, tribological properties of Co-base alloys were improved by incorporation of solid lubricant oxide (K_2WO_4). Friction coefficient was under 0.5 at all temperatures and specific wear rate was of the order of 10~(-8) mm~2/N.