荷重変動下における炭素鋼の摩擦・摩耗特性に及ぼすすべり摩耗履歴の効果

概要

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Machines and components in operation are usually subjected to varying loads. Despite this, wear testing has usually been conducted under constant loads. In this study, in order to investigate the effects of changes in loading on the transition from mild to severe wear, pin-on-disk type wear tests of carbon steel in contact with itself were conducted in moist air under dry sliding. During wear testing, the contact load was changed in a step-wise manner just one time, from low to high levels. A longer sliding distance under mild wear conditions at low load in the first stage produces a more flattened and oxidized sliding surface with good wear resistance. In other words, a "quasi-mild wear" regime with low rate occurred, similar to the mild wear, even at high loads in the second stage. The critical sliding distance L_<s, crtical> in the first stage necessary for the transition to quasi-mild wear in the second stage is given by an empirical formula. The proposed formula indicates that L_<s, crtical> decreases with an increase in the first-stage load and a decrease in the second-stage load. In conclusion the quasi-mild wear can be attained under shorter sliding distance at higher loads in the first stage.
福岡工業大学の論文
2006-02-28