Composite roll is widely applied in all kinds of rolling mill, such as hot rolled strip mill, finishing the work roll, board tape rolling mill, the backup roll type line, steel pipe mill, finishing in the work roll and so on.Some also composite roll roll ring, such as the level of h-beam rolling mill roll, steel tube tension reducing mill of roll, etc.
The outer and core parts of the roll body (including the roll neck part) are made of different materials. The two materials are metallurgy combined rollers. The composite rollers can not only meet the requirements of the mill on the wear resistance and thermal fatigue resistance of the roll body, but also ensure the strength and toughness of the core and neck.
The material of outer layer and core part is mainly selected according to the specific requirements of the roller stand.The commonly used outer materials of the composite roll include chilled cast iron, infinite chilled cast iron, nodular cast iron, high chromium cast iron, alloy steel, semi-steel, high chromium steel, high speed steel, cemented carbide, etc.The common core materials are gray cast iron, nodular cast iron, cast steel, forged steel.