FRICTIONAL SLIDING BEHAVIOUR OF HOT ROLLING MILL COATINGS:

W. TUCKART; W. CHIAPPAROLI; DANIELA CAVALERI; ESTEBAN UBICI; ANDRES ESTEBAN; MONTESI, GUSTAVO; IURMAN, LUCIO

Buenos Aires

Workshop; 2º INTERNATIONAL WORKSHOP OF TRIBOLOGY TRIBAIRES 2013; 2013

Asociación Argentina de Tribología

The durability of the roll is a very important factor in rolling technologies and is determined by the surface deterioration of the roll, that means the wear and/or the surface roughening [1]. Steel industries have been making efforts to improve the product quality and to develop the rolling process with many innovations in the technology of hot rolling. Controlling, understanding and improving the work roll surface quality and its evolution during a campaign play an important role on the success of Hot Strip Mill Process. Roll surface is subjected to very severe and complex friction conditions which are the temperature, the stresses, the materials and the atmosphere etc., so a great variety of tribological phenomenacan are involved. Research on these mechanisms is necessary for the material design and the proper usage of the rolls. However, it is difficult to investigate these tribological phenomena, because it is impossible to observe directly the rubbing interfaces and the mechanisms must be guessed by observing the surfaces after being rubbed. Realistic simulations have not yet been established. Because of these reasons, investigations on the mechanisms of roll surface deterioration are very rare [2]. The objective of this work is to evaluate the friction behaviour of two hot rolling mill coatings by different tests. The records of the coefficient of friction are analyzed in each case, for performance comparison between coatings.