Fatigue Strength Analysis of Carburized Transmission Gears

Author:  Y. Okada, M. Yoshida, H. Tahara, T. Matsumoto
Source:  JSAE Review Vol 11 No 3
Doc ID:  1990127
Year of Publication:  1990
Abstract:  
Improving the fatigue strength of gears is important for compatibility with rising of engine power, and for miniaturization of lightness of transmission units. Generally, carburized helical gears are used for automobile transmissions. Nevertheless, there are many unclear points in the relationship between fatigue strength and material factors. Therefore, this report investigates the effects of material factors such as intergranular oxidation, alloying elements, etc., and the effect of shot peening, by examining the fatigue strength of carburized helical gears which are manufactured from various low alloy steels and different manufacturing processes, and aditinally investigates the behavior of fatigue cracks.