211 Effect of Gear-Side Case-Hardening on Residual Stress and Bending Fatigue Strength of Case-Hardened Spur Gears

Abstract

This paper presents a study on effect of gear-side case-hardening on residual stress and bending fatigue strength of case-hardened spur gears. The bending fatigue tests of case-hardened gears with different case depths and case-hardened parts (tooth surface and gear-side) were carried out, and the test results were examined on the basis of the residual stresses calculated by the three dimensional finite-element method (3D-FEM). Effects of the case depth, the residual stress and the gear-side case-hardening were determined to the considerable extent.