Thermal tribological behaviour of composite carbon metal steel brake

Friction behaviour of carbon brake block/brake drum system is studied at high sliding speed (Omega = 2000 tr/mn; upsilon = 13 m/s) under high applied normal load (P = 20 Kg). The mean contact temperature is measured by K-thermocouple placed in brake block and in brake drum. The real contact temperature is calculated. Friction behaviour and temperature evolution will be given and discussed versus the brake block effusivity/drum brake effusivity ratio and versus Peclet number. Carbon brake block thermal and mechanical damage is observed under high dynamic load (high applied normal load and high sliding speed). The transferred films are analysed and quantified by Scanning Electron Microscopy. The aim of this paper is to present the tribological results versus normal load and sliding speed; and the contact temperature. We will present and discuss thermo-mechanical surface damage analysis of brake block. (C) 1999 Elsevier Science B.V. All rights reserved.