軸受鋼の繰返し往復すべり接触における摩擦挙動と表面損傷

抄録

Delamination failure is one of the most important engineering issues for rolling contact machine elements. It is known that this failure is intimately related to shear-mode (mode II and mode III) fatigue crack growth. Generally, the shear-mode fatigue crack growth behavior and its threshold condition can be greatly influenced by the crack face interference. Therefore, understanding of the mechanism of friction and surface damage of crack faces is of importance and a new testing method that can examine appropriately these properties is required. In this study, the influences of the cyclic reciprocating sliding contact with micro-scale relative motion on the frictional behavior and the surface damage of a bearing steel were studied under dry condition. As a novel friction and wear testing method, a cyclic ring-on-ring test was conducted by making use of a hydraulic-controlled combined axial and torsional fatigue testing machine. The coefficient of kinetic friction was ranged from 0.4 to 1.0, the average value being about 0.75.