Work roll TOPICN13066 Machined Parts The working roll plays a role in causing strip elastoplastic deformation in the Straightening Roll process. The role of the Back Up Roll intermediate roll is the working roller, it is between the supporting roll and the working roll, it is required that the supporting roll and the intermediate roll completely linear contact. The working roll and the intermediate roll should have a strong surface hardness and core toughness, but also require a high tolerance of size and shape. The highest hardness of the working roll can reach HRC 64 degrees, in order to avoid the working roll, the intermediate roll and the supporting roll scratch each other, according to the supporting roll, the intermediate roll, the working roll order, its hardness in turn is better 2 degree less than the former. Working Roll Material: GCr15, 9Cr2Mo, Cr12Mo1V1.