高强度圆柱齿轮S-N曲线转折点循环数N_0的初步研究  

Investigated the Cycles N_0 Corresponding to the Breaking Point of the S-N Curve for High Strength Cylindrical Gear

作　　者：卢曦[1] 李萍萍[1] 郑松林[1] 

机构地区：[1]上海理工大学,上海200093

出　　处：《中国机械工程》2007年第3期324-327,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50375101);上海市教育委员会重点科研项目(06ZZ35)

摘　　要：零件的S-N曲线转折点循环数N0是零件疲劳强度评价和设计的一个重要参数。现有试验表明,材料的S-N曲线转折点循环数N0和零件的S-N曲线的N0值相差不大,可用材料的S-N曲线的N0值代替零件的S-N曲线的N0值。对高强度圆柱齿轮单齿的弯曲疲劳S-N曲线进行试验研究,得到了高强度齿轮的S-N曲线转折点循环数N0,结果表明,高强度齿轮的S-N曲线的N0值远远小于其材料的S-N曲线的N0值,不能用材料的S-N曲线的N0值代替零件的S-N曲线的N0值。从微观组织上初步解释了高强度齿轮的S-N曲线的N0值远小于材料的S-N曲线的N0值的原因。The cycles corresponding to the breaking point ot component is an important parameter for fatigue strength assessment and design. Existing test results shown the No values of material S- N curve were not much different from the No values of notched specimens S-N curve. The No values of material S-N curve can be used for the No values of component S-N curve. The bend S-N curve and the No values of high strength cylindrical gear were investigated. Test results show the No values of high strength cylindrical gear are different from the No values of material. The No values are not substituted each other between material and component. The basic microcosmic reasons that No value of high strength cylindrical gear is smaller than that of material were also studied herein.

关 键 词：转折点循环数 S—N曲线 高强度圆柱齿轮 微观组织分析 

分 类 号：U463.3[机械工程—车辆工程] TG114[交通运输工程—载运工具运用工程]