Impact and Bending Fatigue Strength of Case-Hardened Gears at Low Temperature

Abstract

This paper presents a study on the impact and bending fatigue strength of case-hardened gears with various case depths at low temperature (-60°C). For this experiment were used gear-impact testing equipment and a gear-bending fatigue testing machine of hydraulic loading type with a cooling chamber, which were developed by the authors. The impact and bending fatigue strength of case-hardened gears at room and low temperature, and the effects of case depths on these strengths were clarified considerably.