The graphite crystallization high-speed steel type cast iron material null which is superior in resistance rough skin

摘要

PROBLEM TO BE SOLVED: To secure the high wear resistance of a high speed steel type cast iron material containing crystallized graphite, used as an outer layer material of a composite roll for rolling, and to improve its surface roughening resistance. ;SOLUTION: This cast iron material has a composition consisting of, by weight, 1.8-3.6% C, 1.0-3.5% Si, 0.1-2.0% Mn, 2.0-10.0% Cr, 0.1-10.0% Mo, 1.0-8.0% V, 0.21-2.0%, in total, of at least one kind among the group of lanthanoide series elements, further at least one kind among ≤3.0% Nb, ≤2.0% Ti, ≤10.0% Ni, and ≤5.0% Co, and the balance Fe with inevitable impurities. Other than the alloy components, at least either of 0.01-0.50% Al and 0.01-0.50% Zr, and/or 0.01-0.50% B can be incorporated, if necessary.;COPYRIGHT: (C)1999,JPO