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    • 3. 发明专利
    • PRODUCTION OF COMPOSITE ROLL
    • JPS60133967A
    • 1985-07-17
    • JP24859283
    • 1983-12-23
    • KAWASAKI STEEL CO
    • MIZUNUMA SHINANHIROE YOSHINORI
    • B22D19/16
    • PURPOSE:To manufacture inexpensively and easily a satisfactory composite roll which has a uniform thickness of the outside layer and is free from mixing in components by supporting and disposing concentrically the pipe having the boundary diameter of the inside and outside layers of the composite roll in a casting mold for the body part of the roll and pouring different molten metals into the inside and outside cavities in the same ascending state of the molten metal surfaces. CONSTITUTION:A pipe 14 having the diameter equiv. to the diameter in the boundary part between the inside and outside layers of a composite roll is concentrically supported and disposed into a casting mold 11 for the body part of the roll by a cope 10 and a drag 10. Respectively different molten metals are poured into the inside and outside cavities 13a, 13b of the casting mold by bottom pouring 16, 17 and the molten metal surfaces in this case are risen in the same state. The molten metals are welded satisfactorily to the surface of the pipe 14, thus forming the satisfactory composite roll without mixing of the different molten metals. Even if the pipe 14 is partly eroded, the different molten metals are hardly discharged and mixed as the molten metals rise at the same level.