PRODUCTION OF OUTER LAYER MATERIAL OF ROLL FOR HOT ROLLING FINISHING FRONT STAGE AND ROLL FOR HOT ROLLING FINISHING FRONT STAGE

摘要

PURPOSE: To produce an outer layer material of a roll for hot rolling finishing front stage and a roll for hot rolling finishing front stage, in which the outer layer material is reduced in a friction coefficient and excellent in wear resistance and the inner part of the roll is free from defects. ;CONSTITUTION: This outer layer material of a roll for hot rolling finishing front stage has a composition consisting of, by weight ratio, 3.5-5.0% C, ≤1.5% Si, ≤1.2% Mn, 5.5-12.0% Cr, 2.0-8.0% Mo, 3.0-10.0% V, 0.6-7.0% Nb, and the balance Fe with inevitable impurities and satisfying the following inequality 1: Nb/V≤0.2...(1). By this method, the roll free from breakage accident can be obtained.;COPYRIGHT: (C)1996,JPO