JPS5666309A - Abrasion-resisting and crack-preventive roll and its manufacture - Google Patents

Abstract

PURPOSE:To prevent the deterioration the abrasion-resistivity and the crack-preventative, and to improve the rolling performance, by constituting the rolling roll by into a composite roll, and by forming the work-hardened layer in the surface of the roll drum upon occasions. CONSTITUTION:The rolling roll is formed into a composite roll comprising the outer shell 1 and the core material 2. Next, the working roller 3 is pressed to the revolving surface of the drum of the composite roll, and is transferred in the axial diretion in order to uniformly form the work-hardened layer. Meanwhile, in case of the roll to be used by successively transferring to the former stand, like as the finishing work roll of the hot strip mill, the work hardening treatment is applied to the roll upon occasions after serving in the rolling work with the roll diamter changing from the new roll diameter to a would-be scrapped diameter; hereby, even if the roll diameter is reduced due to the abrasion, the deterioration of the abrasion-resistance is prevented. Moreover, the roll can be treated so as to be rich in the crack-preventiveness.