Tribological Properties of the Micro-WEDM Surface under Dry Friction and Wear Conditions

Abstract:

The reciprocating sliding tribological behavior of the micro wire electrical discharge machining (micro-WEDM) surface was investigated under dry friction and wear conditions by using the ball-on-flat contact model with 0.6mm amplitude. The influences of different loads and frequencies on the friction coefficient were analyzed and the wear mechanism was also studied. The results showed that the friction coefficient decreased with the load increasing because of the third body friction, friction coefficient decreased with the frequency increasing because the oxide film formed with temperature rising led to the decrease of shear strength of microtip contact surface. The wear-loss volume of the micro-WEDM surface increased with load and frequency increasing, and the wear scars appeared adhesion and oxidation wear mechanism.