摘要
以表面工艺强化前后齿轮疲劳特性的变化为基础,研究表面强化工艺在齿轮表面产生的硬化层和残余压应力对S-N曲线特性及裂纹萌生区域的影响。结果表明:S-N曲线转折点N0下降主要是由于疲劳极限升高引起;高周疲劳试验,残余压应力下降不明显,可以提高齿轮不同深度下的疲劳极限。通过合理控制硬化层和残余压应力,可以将裂纹萌生区域控制在次表层,提高齿轮的表面强度特性,这对改善齿轮疲劳特性是切实有效的。
The changes of gear fatigue characteristics before and after typical surface strengthen processes were investigated. Hardened layer and residual stress had a huge impact on S-N curve characteristics and crack initiation region. The results show that the S-N curve turning point No decline is mainly due to the fatigue limit increasing in the research. Residual stress doesn＇t decline obviously in high-cycle fatigue test, which can improve the fatigue limit under different depths of gears. It is possible to control crack initiation region under sub-surface and improve gear strength characteristics by controlling hardening layer and residual stress reasonably, which is effective for improving gear fatigue characteristics.
出处
《热加工工艺》
CSCD
北大核心
2013年第20期160-162,166,共4页
Hot Working Technology
基金
国家自然科学基金资助资助项目(51175346)
上海市科委基础研究重点项目(12JC1407000)
上海市教育委员会科研创新项目(11YZ114)
上海汽车工业科技发展基金会资助项目(1210)
关键词
表面工艺强化
硬化层
残余压应力
裂纹萌生区域
surface strengthen
hardened layer
residual stress
crack initiation region
