Effect Of Shot Peening After Carbonitriding On The Contact Fatigue Strength Of Chromium-containing Steel

Author:  A. Goloborodko, Y. Watanabe
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008090
Year of Publication:  2008
Abstract:  
ABSTRACT The effect of shot peening on the contact fatigue strength of carbonitrided steel has been investigated by roller-pitting testing under conditions similar to those experienced by automatic transmission gears. Results show that the shot peening process improves the resistance to softening and has a greater effect after carbonitriding compared to carburizing. Consequently, the combination of shot peening and carbonitriding process improves the contact fatigue strength (pitting life) more than the combination of carburizing and shot peening. KEY WORDS Gear, Shot Peening, Contact Fatigue Strength, Carburizing, Carbonitriding, Resistance to Softening