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ROLL OUTER-LAYER MATERIAL PRODUCED BY CENTRIFUGAL CASTING FOR HOT ROLLING WITH EXCELLENT FATIGUE RESISTANCE, AND COMPOSITE ROLL PRODUCED BY CENTRIFUGAL CASTING FOR HOT ROLLING
ROLL OUTER-LAYER MATERIAL PRODUCED BY CENTRIFUGAL CASTING FOR HOT ROLLING WITH EXCELLENT FATIGUE RESISTANCE, AND COMPOSITE ROLL PRODUCED BY CENTRIFUGAL CASTING FOR HOT ROLLING
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机译：离心铸件生产的具有优异耐疲劳性的热轧轧制外层材料，以及离心铸件生产的热轧复合轧制材料
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摘要
PROBLEM TO BE SOLVED: To provide a roll outer-layer material produced by centrifugal casting for hot rolling with excellent fatigue resistance in a roll surface-layer.;SOLUTION: The roll outer-layer material produced by centrifugal casting has a composition which contains, by mass%, 2.3-2.9% C, 0.2-0.8% Si, 0.2-1.0% Mn, 5.0-7.5% Cr, 4.4-6.5% Mo, 5.3-7.0% V and 0.6-1.5% Nb, while satisfying 14.0≤(Mo+1.7V)≤17.0 (wherein Mo and V are the contents of the elements (mass%)), and which further contains 0.001-0.03% Al and/or 0.001-0.03% REM. The material contains carbides in an amount of 13-40% in terms of areal proportion. Due to this configuration, the surface layer has significantly improved fatigue resistance. A shaft material is fusion-bonded to and integrated with this roll outer-layer material to produce a composite roll. This composite roll, which is produced through centrifugal casting, is excellent in terms of the fatigue resistance of the surface layer and is suitable for use as a roll for hot finish rolling.;COPYRIGHT: (C)2013,JPO&INPIT
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