1. Root cause failure analysis;Mobley,1999
2. Decker Maschinenelemente;Decker,2002
3. Available from: http:/www.elecon.com/gearworld/dat-gw-failure.html.
4. The Contract Heat Treatment Association, Datasheet for non-heat-treaters, carburising and carbonitriding, 1996.
5. Steel heat treatment handbook;Totten,1997