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Patent Searching and Data


Title:
COMPOSITE ROLL FOR ROLLING
Document Type and Number:
Japanese Patent JP2007125561
Kind Code:
A
Abstract:

To provide a composite roll for rolling in which problems in the conventional rolling roll are solved, and which combines excellent wear resistance, surface roughening resistance and seizure resistance, and in which an external layer and an internal layer are soundly deposited.

The composite roll for rolling has a structure where MC carbides are dispersed into a matrix having a Vickers hardness Hv of 550 to 900 in 20 to 60% by area, and comprises: an external layer α in which the region which does not include the MC carbides with the diameter of the equivalent circle of ≥15 μm in the structure does not exceed 150 μm by an inscribed circle diameter; an internal layer γ made of flake graphite cast iron, spheroidal graphite cast iron, graphite steel or cast steel; and an intermediate layer δ between the external layer and the internal layer.


Inventors:
Furushima, Seishi
Matsumoto, Shunji
Honda, Ryota
Hayashi, Kiyoshi
Honda, Takashi
Uchida, Masatsugu
Oyama, Seiji
Oosue, Takuya
Application Number:
JP2005000318049
Publication Date:
May 24, 2007
Filing Date:
November 01, 2005
Export Citation:
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Assignee:
HITACHI METALS LTD
International Classes:
B21B27/00; B21B27/02; B22D13/02; C22C37/00; C22C38/00; C22C38/04; C22C38/12; C22C38/58