Processus de formation et de rupture des couches d’oxydes dans le contact tournant sec Acier-Acier

Abstract

During the friction of the steel pair, particularly when the dynamic load is high, the formation of the oxide layers is facilitated. These films cover the facing surfaces and play an important role in tribological behavior. On the other hand, the increase in temperature promotes not only oxidation but also the formation of the wear particles that govern the behavior of friction and wear. Our study therefore concerns the conditions of formation and rupture of the oxidized layers. For this, we propose oxidation and rupture models of these oxide films taking into account the operating conditions of the couple. We also propose a model of temperature calculation. Tests will be carried out using the existing tribometer at the Laboratory of Mechanics. Observations and analyzes will be made using techniques such as optical and electronic microscopes.