Roll outer layer material for hot rolling and method of manufact

Details Roll outer layer material for hot rolling and method of manufact Roll outer layer material for hot rolling and method of manufact

1995-06-26

1997-10-07

Cuda, Irene

Roll or roller

Metal deforming roll

Specific composition

492 54, 492 58, C22C 3836

Patent

active

056741715

ABSTRACT:
A roll outer layer material for hot rolling consists essentially, as analyzed in weight percent, of 2.5-4.0% C, 6.0-20% Cr, 3.0-10.0% V, 0.6-5.0% Nb, 2.0-15% Mo, 3.0% or below Si, 3.0% or below Mn, C, V, Nb and Cr satisfying a formula where 10.5.ltoreq.6.5.C(%)--1.3.V(%)--0.7.Nb(%).ltoreq.2.Cr(%)--2, and the balance being Fe and incidental impurities. A method of manufacturing a roll for hot rolling comprises the steps of centrifugally casting an outer layer material having the above composition, centrifugally casting graphite steel containing 0.5% or above of C as an intermediate layer, and casting an axis material which is a spheroidal graphite cast iron, a flake graphite cast iron or a graphite steel. Carbon is present in the intermediate layer in an amount which satisfies a formula, C (intermediate

REFERENCES:
patent: 3929518 (1975-12-01), Akahori et al.
patent: 5316596 (1994-05-01), Kataoka

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