含Ni量、渗氮层深度及喷丸强化对42CrMo齿轮弯曲疲劳性能影响研究

doi:10.3969/j.issn.1004-132X.2024.03.002

摘要/Abstract

摘要： 针对不同含Ni量、渗氮层深度和喷丸强化组合的42CrMo齿轮开展弯曲疲劳试验，探究了不同工艺组合的齿轮弯曲疲劳极限提升效果，为齿轮抗疲劳制造提供工艺指导。基于随机森林算法分析了不同工艺组合齿轮的表面硬度、渗氮层深度、表面残余应力和含Ni量对弯曲疲劳极限的贡献度，采用多元回归建立了考虑表面硬度、渗氮层深度、表面残余应力和含Ni量的齿轮弯曲疲劳极限预测公式。预测值与试验值相比，最大误差可以控制在7.80%以内，为工程应用中快速、低成本评估齿轮弯曲疲劳极限提供了理论依据。

关键词: 弯曲疲劳, 含镍量, 渗氮层深度, 喷丸, 疲劳极限预测

Abstract: Single tooth bending fatigue tests were conducted on 42CrMo gears with different combinations of Ni content, nitriding hardening depth, and shot peening. The effectiveness of different process combinations on improving the bending fatigue limit of gears was investigated, providing process guidance for gear fatigue resistance manufacturing. Additionally, the contribution of surface hardness, nitriding hardening depth, surface residual stress, and Ni content to the bending fatigue limit of gears with different process combinations was analyzed using the random forest algorithm. A multiple regression model considering surface hardness, nitriding hardening depth, surface residual stress, and Ni content was established to predict the bending fatigue limit of gears. Comparing the predicted values with experimental values, the maximum error is controlled within 7.80%, providing a theoretical basis for the rapid and low-cost assessment of gear bending fatigue limit in engineering applications.

Key words: bending fatigue, Ni content, nitriding hardening depth, shot peening, fatigue limit prediction

中图分类号:

TH114

武忠睿, 陈地发, 吴吉展, 杨玉典, 刘怀举. 含Ni量、渗氮层深度及喷丸强化对42CrMo齿轮弯曲疲劳性能影响研究[J]. 中国机械工程, 2024, 35(03): 394-404.

WU Zhongrui, CHEN Difa, WU Jizhan, YANG Yudian, LIU Huaiju. Study on Influences of Ni Content, Nitriding Hardening Depth, and Shot Peening on Bending Fatigue Performance of 42CrMo Gears[J]. China Mechanical Engineering, 2024, 35(03): 394-404.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2024.03.002

http://www.cmemo.org.cn/CN/Y2024/V35/I03/394

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