On the Application Results and the Properties of Forged White Cast Iron Roll

Abstract

A great progress has recently been made in Japanese steel rolling equipments with the increase of production capacity and the improvement in the quality of products. And there are requirements for better roll materials. The forged iron roll whose trade name is N-T roll is the one having an entirely new material property, manufactured by carrying out a special hot forging on white cast iron body which has a composition range of high purity hypoeutetic pig iron. This report describes the characteristic properties of this roll, focusing upon the results of hot rolling of various steels by this roll.
The following characteristics of the roll were confirmed by the rolling application.
(1) Rolling tonnage per dressing is remarkably increased.
(2) The cycle of roll exchange for dressing is made unexpectedly longer and it contributed greatly to the increase of productivity.
(3) Rolling cost is decreased.
(4) Accuracy of dimention of rolled products is increased.
(5) Surface of the rolled products becomes more beautiful.