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论述 4 0MnB调质齿轮弯曲疲劳强度的试验研究。短寿命区采用 4级恒定应力水平的成组试验法 ,长寿命区采用应力升降法。拟合出完整的C -R -S -N曲线 ,并获得置信度为 95 %、可靠度为99%以下的弯曲疲劳极限应力值
Research on the Bending Fatigue Strength of 4 0MnB Quenchant Gear. The short-lived zone uses a set of four-level constant stress levels of the group test method, the long-life zone stress lift method. The complete C -R -S -N curve was fitted and the bending fatigue ultimate stress value with 95% confidence and 99% reliability was obtained