Service life enhancing design of surfaces with adjusted metalworking fluids on the example of lubicated metallic friction systems

• Applicants: Professor Dr. Heinrich Arlinghaus; Professor Dr.-Ing. Ekkard Brinksmeier
• Subject Area: Metal-Cutting and Abrasive Manufacturing Engineering
• Term: from 2014 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 249613872

The general objective of this research project is the development of a method to improve the performance of parts for lubricated metallic friction systems in combination with appropiatly additivated metalworking fluids for finishing processes. Within the finishing process the parts surface should be pre-conditioned in that way, that even at further reduction of part size or increased workload a constant friction coefficient at sufficient level is secured. By this, the actual state of service life should nevertheless be achieved.It is evident, that chemical effects of additives in metalworking fluids provide a beneficiary effect on the tribological behavior of machine parts. A need for further research is in the first place given with regards to the understanding of the chemical and/or physical mechanisms which cause an improvement of the running-in behavior and as a result an enhancement of service life by a pre-conditioning during machining. Within the proposed research project the fundamentals should be explored systematically, which is necessaryto understand the cause-and-effect relationships between the final surface integrity after machining and the surface integrity under operating conditions. Of particular interest is therefore the interaction between finishingprocess, tribological load and the combined application of different high resolution methods for surface analysis. For complete description of these interactions it is necessary to understand clearly the relationshipsbetween process parameters, composition of surface layer before and after tribological load and the friction and wear behavior from the beginning of the machining process until the final formation of tribological surface layers under work conditions. Based on this, finishing processes which are optimized from a tribological point of view will be defined and guidelines for future design of machining processes will be established.

• DFG Programme: Research Grants