Tribology during Hot, Flat Rolling of Steels

Abstract Tribology, defined to include the transfer of heat and forces at the surface of contact, is studied. The parameters affecting hot tribology are presented and discussed. An optical technique is used to monitor the forward slip during hot rolling, in air, of low carbon steel slabs. The forward slip is then related to the coefficient of friction by a finite element method. While previously published data indicate that the coefficient of friction increases, decreases, reaches a plateau before falling or remains steady with increasing temperatures, the current results clearly show that μ decreases with temperature and increases with load. The coefficient of heat transfer is also strongly dependent on the process parameters. The data is used to shed new light on roll wear.