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Influence of running-in on surface characteristics of efficiency tested ground gears
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2017 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 115, 45-58 p.Article in journal (Refereed) Published
Abstract [en]

The effect of running-in load (0.9 or 1.7 GPa) on surface characteristics of ground spur gears, and on their development during subsequent efficiency testing (FZG rig), is examined. The effect was confined to less than 10 μm depth. Micropitting was associated with surface asperities and their plastic deformation; higher running-in load gave more micropitting, also after identical efficiency tests. Running-in increased unequal compressive residual stresses in both profile and axial directions, while after efficiency testing they approached equal levels. Deformation induced martensite is considered to form during running-in only at high load, still the amount after efficiency testing increased with running-in load. Higher surface content of phosphorous from extreme pressure additive (EP) occurred only after efficiency test following running-in at high load.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 115, 45-58 p.
Keyword [en]
Efficiency test, Gears, Micropitting, Residual stresses, Running-in, Tribofilm
National Category
Tribology
Identifiers
URN: urn:nbn:se:kth:diva-209492DOI: 10.1016/j.triboint.2017.05.018Scopus ID: 2-s2.0-85019906312OAI: oai:DiVA.org:kth-209492DiVA: diva2:1113024
Note

QC 20170621

Available from: 2017-06-21 Created: 2017-06-21 Last updated: 2017-06-21Bibliographically approved

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