Title:
HOT-ROLLING COMPOSITE ROLL PRODUCED BY CETRIFUGAL CASTING
Document Type and Number:
WIPO Patent Application WO/2014/178437
Kind Code:
A1
Abstract:
A composite roll which has been produced by centrifugal casting and which is for use in hot rolling, comprising (a) an outer layer made of a cast iron which has both a chemical composition that contains, by mass, 2.5 to 3.5% of C, 1.3 to 2.4% of Si, 0.2 to 1.5% of Mn, 3.5 to 5.0% of Ni, 0.8 to 1.5% of Cr, 2.5 to 5.0% of Mo, 1.8 to 4.0% of V and 0.2 to 1.5% of Nb with the balance being Fe and unavoidable impurities and that has an Nb/V mass ratio of 0.1 to 0.7 and an Mo/V mass ratio of 0.7 to 2.5 and satisfies 2.5≤V+1.2Nb≤5.5, and a structure that contains 0.3 to 10% by area of a graphite phase, (b) a shaft core part made of a ductile cast iron having a ferrite area fraction of 35% or less, and (c) an intermediate layer made of a cast iron.
Inventors:
ODA NOZOMU (JP)
SEGAWA TAKAYUKI (JP)
NOZAKI YASUNORI (JP)
SEGAWA TAKAYUKI (JP)
NOZAKI YASUNORI (JP)
Application Number:
PCT/JP2014/062146
Publication Date:
November 06, 2014
Filing Date:
May 02, 2014
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B21B27/00; C22C37/00; C22C37/04
Foreign References:
| JP2000160277A | 2000-06-13 | |||
| JP2009066633A | 2009-04-02 | |||
| JP2002088445A | 2002-03-27 | |||
| JPH09170041A | 1997-06-30 | |||
| JP2005105296A | 2005-04-21 | |||
| JP2004082209A | 2004-03-18 | |||
| JP2002088444A | 2002-03-27 | |||
| JPH09170041A | 1997-06-30 |
Other References:
See also references of EP 2902124A4
Attorney, Agent or Firm:
TAKAISHI Kitsuma (JP)
Kitsuma Takaishi (JP)
Kitsuma Takaishi (JP)
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