| 摘要 |
In a high chrome work roll, between the outer layer of a cast iron containing 10 DIFFERENCE 25 weight % Cr and the core of a ductile cast iron containing less than 1.5 weight % Cr, an intermediary layer of a cast iron containing 5 DIFFERENCE 10 weight % Cr is provided, and united therewith integrally in the metallurgical sense. This high chrome work roll is manufactured by forming the outer layer by casting the molten metal into a revolving mold of a centrifugal caster; forming the intermediary layer by casing into this mold the molten metal to form a cast iron containing less than 1.0% Cr, before the inside surface of the outer layer has been set, and finally forming the core by casting the molten metal to form a ductile cast iron into this mold, the existence of the intermediary layer preventing as much as possible Cr from diffusing and mixing into the core.
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