Título

THE EVOLUTION OF WORK ROLL MATERIALS FOR THE ROUGHING MILL APPLICATION

THE EVOLUTION OF WORK ROLL MATERIALS FOR THE ROUGHING MILL APPLICATION

Autoria

Heisterkamp, Peter; Nylén, Tommy; Lew Prenni, Jr

DOI

10.5151/2594-5297-0004

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Resumo

Since the beginning of hot rolling a variety of different materials have been used for work rolls in the roughing stands of hot strip mills. Increasing quality demands as well as the economical pressure from the rolling mills, have forced the roll manufacturers to develop enhanced roll grades for this application. The final quality of the hot strip and even the cold strip is already preset in the roughing mill so that each disturbance of the roll gap geometry or surface aspects have significant impact on the final product. This paper gives a description of the existing rolling conditions in the roughing stand and the required roll properties. It will also give an overview about the evolution of roll grades from Adamite and Nodular Iron qualities up to the more enhanced Chrome Steel and Semi-HSS grades including specific material characteristics and field results. One paragraph is dedicated to the latest development, the implementation of HSS- rolls in the roughing application. The Åkers Group has started trials in several mills all over the world.

 

Since the beginning of hot rolling a variety of different materials have been used for work rolls in the roughing stands of hot strip mills. Increasing quality demands as well as the economical pressure from the rolling mills, have forced the roll manufacturers to develop enhanced roll grades for this application. The final quality of the hot strip and even the cold strip is already preset in the roughing mill so that each disturbance of the roll gap geometry or surface aspects have significant impact on the final product. This paper gives a description of the existing rolling conditions in the roughing stand and the required roll properties. It will also give an overview about the evolution of roll grades from Adamite and Nodular Iron qualities up to the more enhanced Chrome Steel and Semi-HSS grades including specific material characteristics and field results. One paragraph is dedicated to the latest development, the implementation of HSS- rolls in the roughing application. The Åkers Group has started trials in several mills all over the world.

Palavras-chave

roughing mill rolls, roll grades, high-speed steel

roughing mill rolls, roll grades, high-speed steel