Distance from suface - mm
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Chilled Rolls
As the name implies, the barrel surface of these rolls does not show a clear chill layer but rather a gradual transition from a carbide rich structure containing a small amount of fine graphite at the surface to a grey core material. These Rolls ensure minimum sacrifice of clear chill while achieving maximum functional depth.
The transition from Chill to graphite being smoother, the gradual change in hardness associated with the indefinite-chill structure allows deeper grooving. Thus Indefinite Chill Rolls are superior in biting performance and have enough strength and resistance against thermal shock occurring at the time of failure in the rolling operation compared to other Chill Rolls. The presence of the graphite improves spall resistance and also enhances resistance to fire cracking. These Rolls are available in Pearlitic matrix as well as Accicular/Bainitic matrix as well depending on the requirement of rolling mill.
Chilled Rolls
Chemical Composition
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