EFFECTS OF CARBURIZED PART, HELIX ANGLE AND FACE WIDTH ON RESIDUAL STRESSES OF CASE-CARBURIZED HELICAL GEARS

摘要

The carbon content of each element of the FEM gear models due to carburizing was obtained according to hardness HV-carbon content C% and C%-d (distance from surface) charts. A heat conduction analysis and an elastic- plastic stress analysis for the case-carburizing process of helical gears were carried out by the three-dimensional finite- element method (3D-FEM), and then residual stresses were obtained. Effects of case depth, carburized part, helix angle and face width on residual stresses of case-carburized helical gears were determined.