| 摘要 |
PURPOSE:To offer working roll which has a wear resistance and a rough surface resistance, and used, while applying its bending by joining an outer layer of an iron base alloy having specific hardness and containing an MC type carbide consisting of C, Si, Mn, Cr, Mo, W, V of specific weight ratios to an axial material, and applying bending of a specific radius of curvature to a drum part and using it. CONSTITUTION:A hot working roll 1 is used, while applying bending to its drum part by a horizontal bending device 6 through an intermediate roll 4 and a supporting roll 5. In this case, the working roll is constituted by joining an iron base alloy outer layer 18 whose hardness is >=70HS and which contains an MC type carbide consisting of 1.5-3.5% C, 0.3-3.0% Si, 0.3-1.5% Mn, 2-7% Cr, <=9% Mo, <=20% W, 3-15% V, and the balance Fe by a weight ratio as its chemical components, to an axis material 15. The working roll is used by applying bending whose radius of curvature is <=550m to its drum part. In such a way, the working roll which has a wear resistance and a rough surface resistance, and used, while applying its bending can be offered. |
