Fundamental study of generation of interfacial temperatures with metal surfaces and coatings under conditions of sliding friction and mechanical impact: Part 1 - Thermal analysis and theoretical evaluation of surface temperature

摘要

A study has been carried out to evaluate the surface temperatures reached on sliding metallic surfaces over a wide range of conditions. This is of interest for a number of reasons, including determining the conditions of mechanical sliding friction which might be associated with failure or loss of adhesion of a coating intended to prevent galling or seizure and establishing the likelihood of igniting any pyrophoric substances present on the surface. In Part 1 of the study, the uncertainties involved in determining the surface temperature are considered and a thermal analysis performed to illustrate how variations in the properties of the contacting surfaces, together with the loading and sliding conditions influence the surface temperature. A numerical analysis of the heat transferred into the bulk of the metal indicates that in many cases the generated temperature increase will significantly decay over a comparable depth to that of an engineering metal coating.