AUMENTO DA ESTABILIDADE DO PROCESSO DO LAMINADOR DE TIRAS A FRIO COM A UTILIZAÇÃO DE CILINDROS REVESTIDOS COM CROMO.

The stability of a tandem cold mill is essential to assure the thickness control, the main attribute of cold rolled steel sheets. This stability can be defined as the capability to control the process variables that act direct at the thickness. Among the most important variables are the first stand (mill) linear speed and the sheet speed at the interstice ahead of it. This work shows how the chrome plated work rolls application improved this speed control and consequently the stability, which enabled an increase in the work roll rolling campaign (rolling sequence program) in such a way significantly higher, compared to when using a non chrome plated work rolls. As results, significantly improvements of work rolls campaigns and the consequent increase of the equipment availability are presented. [ABSTRACT FROM AUTHOR]