The effect of an organic pentasulfide EP additive in turning and milling operations
Article dans une revue avec comité de lecture
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 of a steel workpiece. The experimental approach is based on the coupling of mechanical tests (turning, milling, and tribological tests) with physico-chemical characterizations (Auger Electron Spectroscopy and X-Ray Photoelectron Spectroscopy) of the friction surfaces (chip and tool). In the case of milling, it was shown that the presence of a pentasulfide additive has a beneficial effect on the specific cutting energy (kc) and flank wear (Vb). These results are correlated with the presence of iron sulfides (FeS and FeS2) on the flank face of the cutter mill and on the chip face in contact with the mill. No such additive effects are found in case of turning. A lubrication model is proposed for the case of milling based on an indirect lubrication of the tool/workpiece and tool/chip contacts due to the transfer of iron and its reaction with sulfur compounds to produce iron sulfides. Because milling is a discontinuous cutting process, this lubrication mechanism is much more efficient than that observed in turning. Indeed, the tool faces are re-fed iron sulfides each time they leave the workpiece.
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 Article dans une revue avec comité de lectureBIERLA, 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, ...
Communication avec acteBIERLA, Aleksandra; FROMENTIN, Guillaume; MARTIN, Jean-Michel; LE MOGNE, Thierry; MINFRAY, Clotilde; GENET, Nicole (Technische Akademie Esslingen, 2008)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 ...
Article dans une revue avec comité de lectureBIERLA, 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 ...
Article dans une revue avec comité de lectureFROMENTIN, 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 Communication avec acteBELOUFA, 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 ...