EFFECTS OF SIDE-FACE CARBURIZING, FACE WIDTH, TEMPERING AND INTERGRANULAR OXIDATION ON BENDING FATIGUE STRENGTH OF CASE- CARBURIZED GEAR

摘要

The hardness measurements of hardened layer, the observation of intergranular oxidation with the SEM and the bending fatigue test for gas and vacuum case-carburized spur gears were carried out, and then profiles of hardened layer, case depth, amount of intergranular oxidation and S-N curves were obtained. Effects of the case depth, the side-face carburizing, the face width, the tempering and the intergranular oxidations on the bending fatigue strength were determined.