Abstract: The scuffing behaviour of steel surfaces under lubricated condition not only depends on the failure of fluid film, but also on whether the effective reaction film formed on the surfaces. In this paper, the influence of sliding speed on the scuffing of steel is described At lower sliding speed, when the fluid film is broken the scuffing does not occur and the reaction film is formed on the friction surfaces, only at high surface temperature and high coefficient of friction, scuffing can take place. At higher sliding speed, it is easy that scuffing occurs when the fluid film has been failed, in this case both the surface temperature and the coefficient of friction before scuffing are lower than at lower sliding speed.

Key words: 胶合, 磨损, 润滑