| 摘要 |
PROBLEM TO BE SOLVED: To prevent the sticking of foreign matter at the time of carrying a steel strip at a high speed and a high tension by forming sprayed coating by ceramit or ceramics on the surface of a process roll for carrying a cold steel strip and sealing the projected parts therein by resin. SOLUTION: On the surface of a process roll 1 for carrying a cold steel strip such as a deflector roll, a pinch roll or the like, sprayed coating 2 having 0.5 to 10 surface roughness Ra by cermet composed of metal or alloy such as Ni, Ni-Cr or the like or by ceramics such as WC, TiC, NbC or the like by 5 to 20μm coating thickness. The recessed parts 3 in this sprayed coating 2 by cermet or ceramics are sealed by chemically stable resin 4 of Teflon series, epoxy series, silicone series or the like. The sticking of foreign matter such as iron powder or the like is prevented at the time of carrying a steel sheet to improve the durability of the roll, and, moreover, the occurrence of flaws caused by foreign matter on the steel strip to be carried is reduced to improve the quality and yield of the steel strip. |
