9MA L,WANG M Q. Influence of Niobium Mieroalloying on Rotating Bending Fatigue Properties of Case Carburized Steels[J].Materials Science and Engineering A,2008,(498):258.
10Murakami Y,Kodama S. Quantitative Evaluation of Effects of Non-Metallic Inclusions on Fatigue Strength of High Strength Steels[J].IntJ Fatigue,1989,(05):291.