1) Alloy Steel Rolls: -
These rolls are available with varied chemical composition, starting from hypo eutectoid steel with carbon % of 0.6% up to hypereutectoid steel with carbon % as high as 2%. Proper heat treatment is mandatory to achieve required microstructure, which contributes to much improved strength, toughness and wear resistance as required in different mills. These rolls are have a ha
rdness ranging from 35 degrees shore C to 55 degrees shore C and are used mainly in the roughing stands and sometimes in the intermediate stands.
2) DPIC Rolls: -
DPIC Rolls have a shell of Cast Iron with flake graphite, the structure consists of graphite and carbides in a matrix that systematically forms a mixture of pearlite and bainite in softer grades and through bainite and martensite in hardest grades. The amount of graphite, carbides and marten site, which have a great influence on the properties of the rolls, are to a large extent determined by the chemical composition. The core however consists of grey iron only. The hardness varies from 70 degrees shore C to 85 degrees shore C, depending on the rolled product or as per customer requirement. These rolls exhibit an excellent wear resistance to fire cracking and breakage, especially in the harder grades and for this reason are primarily used for hot rolling of flat and long products, in the finishing stands.
3) Adamite Rolls:
These rolls are basically alloy steel rolls, having hardness ranging from 43 degrees shore C to 55 degrees shore C with carbon percentage ranging from 1.35% to 2%. These rolls are supplied for intermediate stands, where wear resistance is important along with considerable strength and toughness. Adequate heat treatment is very much necessary to achieve requisite wear resistance along with strength and toughness.
