State Key Laboratory of Mechanical Transmissions;
Chongqing University;
Chongqing 400030;
China;
Hubei University of Automotive Technology;
Shiyan 442002;
Hubei;
China;
Chongqing Wangjiang Industrial Co.Chongqing;
400071;
China;
carburized gear; contact fatigue; surface roughness; residual stress; Dang Van criterion;