Evaluation of Lubricant Viscosity and Base Oil Effects by Form Tapping Test
TypeCommunications avec actes
In order to correlate the effect of lubricant viscosity and base oil on the efficiency of a lubricant, we measure the variation of tapping torque according to ASTM D5619 standard. Three fully formulated lubricants containing the same additive package but having different viscosities are tested in the first part of the experiment. The effect of chemically active and chemically non-active paraffinic base oils combined with a sulphur additive is studied in the second part. The nature of the tribofilm created at the bottom of the threads formed during the second part of the study is characterized by X-ray Photoelectron Spectroscopy (XPS). The aim is to associate the surface analysis results with the efficiency obtained during the form tapping tests. The results show that the lubricant viscosity does not have any influence on the tapping torque values whereas physico-chemical interactions between different base oils and a sulphur additive can modify importantly the overall efficiency of lubricant.
Files in this item
Showing items related by title, author, creator and subject.
Mechanical and physico-chemical study of sulphur additives effect in milling of high strength steel BIERLA, Aleksandra; FROMENTIN, Guillaume; MINFRAY, Clotilde; MARTIN, Jean-Michel; LE MOGNE, Thierry; GENET, Nicole (Elsevier, 2013)Most machining operations require the presence of a cutting fluid in order to ensure their success due to the intensity of thermal and mechanical conditions generated on the cutting tools. In some cases of severe machining, ...
MINFRAY, Clotilde; FROMENTIN, Guillaume; BIERLA, Aleksandra; MARTIN, Jean-Michel; LE MOGNE, Thierry (Elsevier, 2014)Because a cutting fluid could be equally used for different cutting operations, this study proposed to investigate the behavior of a well-known extreme-pressure additive (pentasulfide) in both turning and milling operations ...
BIERLA, Aleksandra; FROMENTIN, Guillaume; MARTIN, Jean-Michel; LE MOGNE, Thierry; GENET, Nicole (WILEY, 2008)This study aims at analyzing the tribochemical mechanisms of lubrication during the process of form tapping and consequently optimizing the formulation of the lubricant. In order to correlate the tribochemical reactions ...
FROMENTIN, Guillaume; BIERLA, Aleksandra; MINFRAY, Clotilde; POULACHON, Gérard (ELSEVIER, 2010)This paper presents the results of a study of lubrication in form tapping and aims at a better understanding of its effect. It appears that lubrication is of paramount importance. Oil with efficient high pressure additives ...
Eco-Driving with Electric Cars: Effect of Continuous and On-Demand feedback on Driving Behavior and Safety BELOUFA, Sabrina; VAILLEAU, Benjamin; BOUCHEIX, Jean-Michel; KEMENY, Andras; MERIENNE, Frédéric (AHFE International, 2014)Analysis of driver behavior has been the purpose of many studies for several years. A new aspect is the introduction of electric vehicles on the car market and the fact drivers are more concerned with their consumptions ...