ホットストリップミル用のワークロールについて

Abstract

The work roll materials in hot strip mills and the damages of rolls which arise in rolling operation are discussed in this paper.As for the rolls in stands of the first half of a roughing mill train, wear and heat cracking are most important problems. The double-poured hard cast steel rolls give excellent rolling performances in these stands. As scale banding and surface deterioration of the rolls are maintroubles in stands of second half of the roughing train and in stands of the first half of finishingtrain, new adamite rolls with fine metallic structures give good results. Wear of roll surface, cracks, and surface spallings due to the rolling of cobbled sheet are main roll damages in the stands of the second half of the finishing train. In oder to prevent these damages, new double-poured alloyed grain rolls made by centrifugal casting method are used for these stands.