OUTER LAYER MATERIAL OF CENTRIFUGAL CASTING COMPOUND ROLL FOR ROLLING AND CENTRIFUGAL CASTING COMPOUND ROLL FOR ROLLING

摘要

PROBLEM TO BE SOLVED: To provide an outer layer material of a centrifugal casting compound roll for rolling which is excellent in wear resistance and surface roughening resistance and to provide a centrifugal casting compound roll for rolling made by melt-sticking and integrating an outer layer composed of the outer layer material and an inner layer.;SOLUTION: An outer layer material of a centrifugal casting compound roll for rolling comprises an Fe alloy, by mass, consisting of 1.50 to 2.70% C, 0.3 to 3% Si, 0.1 to 3% Mn, 0.1 to 2.5% Ni, 4.0 to 7.0% Cr, 4.1 to 8.0% Mo, 5.0 to 10.0% V, 0 to 0.4% W, 0.1 to 3.0% Nb, 0.005 to 0.15% N, 0 to 0.05% B and the balance substantially consisting of Fe and inevitable impurities, and is characterized in that the ratio of V content (mass%) to Nb content (mass%) is 1 to 20.0 and a C-bal exhibited by the following relation is 0 to 0.28: C-bal=C%-0.2×V%-0.06×Cr%-0.063×Mo%-0.033×W%-0.13×Nb%..(1).;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2020,JPO&INPIT