ROLL Russian patent published in 2003 - IPC

FIELD: Rolling; particularly, designs of sleeved rolls of hot- and cold-rolling mills. SUBSTANCE: roll consists of body with built up sleeve made out of two materials; peculiarity is that on each edge of body at a distance of up to 0.35 of body length the built up sleeve is made out of alloy with chromium content not more than 2 %, while the remaining central portion of sleeve is manufactured out of alloy with chromium content not more than 3 %. Built up sleeve can have constant thickness over length of body or variable thickness, in that case sleeve thickness in central portion amounts to 1.01-1.30 of sleeve thickness at edges. EFFECT: enhanced uniformity of wear of middle portion of sleeve and edges; enhanced quality of rolled products and reduced costs for manufacture and/or repair of rolls. 4 cl, 2 dwg, 2 ex