25Cr2MoV气体渗氮齿轮弯曲疲劳强度的试验研究

The Experiment on the Tooth Bending Strength of Nitrided 25Cr2MoV Gear

论述 2 5Cr2MoV深层渗氮齿轮弯曲疲劳强度的试验研究。试验在英国产STRON 160 3型电磁谐振疲劳试验机上进行。短寿命区采用四级恒定应力水平的成组试验法 ,长寿命区采用应力升降试验法。在试验数据基础上 ,根据统计学原理 ,拟合出完整的C -R -S -N曲线 ,并获得各种置信度和可靠度下的弯曲疲劳极限值。

The paper reports the experimental investigation on the reliability of gear tooth bending fatigue strength fordeep nitrided 25Cr2MoV steel gear. The tests were carried out on a electromagnetic resonance fatigue test machine of type STRON 603(U.K). The grouping test method at four constant stress levels was applied for short life span areas while the stress up and down test method were used for long life span areas. The tested data were then processed with statistic method. Complete C—R—S—N curves were thus fitted and as a result, the values of limits of bending fatigue under various reliabilitys were gained.