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HIGH STRENGTH NODULAR IRON ROLLS
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HIGH STRENGTH NODULAR IRON ROLLS

Mill rolls are the spare parts of rolling mills, they are used for all kinds of rolling mills for example BD mills, blooming mills, roughing mills of wire rod or section steel, finishing mills,temper mills, cold or hot strip mills and so on.

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     NCC-Non Continuous Carbide rolls are used in the roughing stands of round and sections, especially the BD2 mills for rail & beams. Compared with other nodular iron rolls, NCC rolls have unique material and heat treatment process ensuring they are good enough to replace the traditional cast steel rolls but with a better life. We control the carbide at a very low level (less than 5%) by reducing the crome down to 0.3%, raising the silicon and applying isothermal quenching to make the carbide solid solution into the matrix. Meanwhile, we can achieve a matrix of tempered sorbite/bainite by applying heat treatment d increasing nickell. This type of matrix has much better performance than the pearlite on the resistance of wear, fire crack and impact, especially the excellent red hardness thanks to the molybdenum.



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1501834607

1501662961


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