8Kagawa H, Ishiguro M, Matsumoto K, et al. Fatigue Strength of Clean Gear Steel With Low Oxygen Content [J]. NNK Technical Report,1993,144:26.
9Flores O, Martinez L. Abnormal Grain Growth of Austenite in a V-Nb Microalloyed Steel [J]. Journal of Materials Science,1997,32(4) :5985.
10Stasko R, Adrian A. Effect of Nitrogen and Vanadium on Austenite Grain Growth of a Low Alloy Steel [J]. Materials Characterization, 2006,56(4) : 340.