Abstract
An intentional change in material properties is an important condition for castings production. It is one way how to meet the casting
requirements of how to adapt the material properties to the operating conditions. Centrifugally cast rolls are multi-layer rollers, castings.
The working layer of the barrel is called the "shell" and the body of the roll and the necks rolls are called "core". The article deals with the
influence of the properties of the core iron. Earlier laboratory experiments were primary analysed for metallographic analysis and
mechanical properties. These data were compared back to the experiments. The results of these laboratory working were later applied in
the operating conditions of the roll foundry Vítkovitcké slévárny, spol. s r.o. The spun cast roll produced with the applied metallurgical
processing change was supplied to the hot strip mill. There were monitored the positive effect of the change of the metallurgical process of
the production of the core iron on the useful properties of the centrifugally cast roll. The experiment was done in order to increase the
mechanical properties of ductile pearlite ductile iron. The copper in these core iron material increases the hardness and strength primarily.
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