CENTRIFUGALLY CAST COMPOSITE ROLLER AND WAY OF ITS MANUFACTURING Russian patent published in 2017 - IPC B22D19/16 B22D13/02 C22C37/00 B21B27/03 C21D9/38 

FIELD: metallurgy.

SUBSTANCE: present invention relates to composite rollers used in rolling process. Centrifugally cast composite roller comprises an outer layer made of cast iron, comprising, by wt %: 2.7-3.5 C, 1.5-2.5 Si, 0.4-1.0 Mn, 3.7-5.1 Ni, 0.8-2.2 Cr, 1.5-4.5 Mo, 2.0-4.5 V and 0.5-2.0 Nb, remaining Fe and unavoidable impurities, wherein the weight ratio of Nb/V is 0.18-0.65, and the weight ratio of Mo/V is 0.7-2.5, and the iron structure includes calculating the square phase 15-45%, 1-10% cementite and graphite phases, and an inner layer made of cast iron, is metallurgically bound to the outer layer; thus suitable for use in the rolling region of the outer layer depth of 10 mm or more, the surface has no dendrites segregated bainite and/or martensite having a diameter of 1.5 mm or more.

EFFECT: document describes the structure and method of manufacturing centrifugal composite roller.

9 cl, 9 tbl, 7 dwg