Contact Fatigue Behaviour of PVD-coated Spur Gears

被引：5
|
作者：
Baragetti, Sergio [1 ]
Terranova, Angelo [2 ]
Tordini, Federico [1 ]
机构：
[1] Univ Bergamo, Dipartimento Progettaz & Technol, Viale Marconi 5, I-24044 Dalmine, BG, Italy
[2] Politecn Milan, Dipartimento Meccan, I-20156 Milan, Italy
来源：
ADVANCES IN FRACTURE AND DAMAGE MECHANICS VII | 2008年 / 385-387卷
关键词：
PVD coatings; Residual stresses; Contact fatigue; Spur gears; Numerical models;
D O I：
10.4028/www.scientific.net/KEM.385-387.57
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper the contact fatigue behaviour of gears coated with PVD (Physical Vapor Deposition) thin hard film was studied. Contact fatigue tests (R = 0) were carried out on both coated and uncoated automotive transmission spur gears, The bulk material and the coating analysed throughout the tests were, respectively, case hardened 18NiCrMo5 and CrN. The influence of the coating was both experimentally and numerically evaluated. Several FEM models were developed to assess the stress and strain distributions from tooth flank surface to in-depth layers. The influence of the surface treatments on the bulk material was taken into account with the models and the Coffin-Manson equation was used to predict the number of load cycles necessary for initial fatigue damage to occur. All the tested tooth flanks were observed using optical microscope and SEM.
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页码：57 / +
页数：2
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