PRODUCTION OF ROLL FOR COILER OF HOT ROLLING EQUIPMENT

摘要

PURPOSE:To obtain the roller for coilers which obviates the generation of bead marks and has excellent wear resistance and seizure resistance by lowering a base material inserted concentrically and perpendicularly into a combined mold disposed in the lower part of a refractory heating mold in a molten steel having a specific component compsn. and cooling the molten metal to solidify. CONSTITUTION:The combined mold integrally superposed with a graphite buffer mold 3 in the lower part of the refractory heating mold 2 externally enveloped with a main electromagnetic induction heating coil 1 and further a coaxial hollow cooling mold 4 in the lower part thereof is disposed. The solid or hollow base material 5 which constitutes the inside layer of the roll is perpendicularly inserted into this mold. The molten metal 6 to constitute the outside layer of the roll is injected into a gap part 7 between the base material 5 and the above-mentioned mold and the base material 5 is intermittently lowered. Consequently, the molten metal 6 is successively cooled to solidify by the buffer mold 3 and the cooling mold 4 while welding to the surface of the base material 5, thereby forming a build-up layer 8. The roller for the coiler of hot rolling equipment is thus obtd. The molten metal 6 having the component compsn. shown in Table 1 is used.