Spin Cast High Chrome Iron RollsFrom the name we can tell the casting process: Spin cast or centrifugal cast double poured. For spun casting,Website:http://www.kdroll.com, there’re three types, i.e. horizontal, vertical and slant spun casting. Compared to static casting, the small qty of high chrome iron outer shell can be fast chilled, result in greater fine dispersed carbides structure. The core employs high strength nodular iron, thanks to the high chrome content of outer shell, the silicon content and nickel content should be higher than normal rolls, so as to reduce the carbides content of roll, thus enhance core strength.Generally speaking, to avoid the chrome spread to core when pouring iron to core, the transition layer should be added between core and shell, the material employs medium-chrome iron, adamite, gray iron, etc. The timing, temperature, molten iron qty should be strictly controlled. The pros of this type of roll:-Relative cost, good properties, great wear resistance, good thermal fatigue resistance, etc, and that’s why it has been widely used.Chemical Composition %SymbolCSiMnCrNiMoVHCrⅠ2.30-3.300.30-1.000.50-1.2012.00-15.000.70-1.700.70-1.500.00-0.60HCrⅡ2.30-3.300.30-1.000.50-1.2015.01-18.000.70-1.700.70-1.500.00-0.60HCrⅢ2.30-3.300.30-1.000.50-1.2018.01-22.000.70-1.701.51-3.000.00-0.60Prosperities&ApplicationSymbolHardnessHSTensile StrengthMPaDimension MMUnit N.W KGSApplicationHCrⅠ60-75≥350Φ400-1000800-15000Vertical rolls and skin pass rolls for hot strip mills, work rolls for medium & heavy plate mills, roll sleeves for universal mills ,work rolls for cold rolled tin plate millsHCrⅡ65-80≥350HCrⅢ75-90≥350
