Abstract
To increase the fatigue limit of the Carburized gears, the following five techniques need to be developed : a)Reduce abnormal surface structure. b)Obtain a fine grain size. c)Decrease the retained Austenite. d)Increase hardness under the surface. e)Improve the residual stress distribution under the surface. For this purpose, the authors conducted a study by using DSG1 steel gears on the new compound surface refining method consisting of Vacuum Carburizing, Contour Induction Hardening and Double Shot Peening. The results showed that the fatigue limit of the gears processed by the new compound surface refining method achieved 150% better than that of the conventional Vacuum Carburized gears.
