Commonly used roll material selection

Selection of work roll material
Roughing front work rolls (R1): Roughing front work rolls must have strong toughness, wear resistance and resistance to thermal cracking. Hardness range of HS40-55 or so. Generally use 60CrNiMo cast steel and other materials roll.

Roughing after the section of the work roll (R2): roughing after the section of the work roll requires the use of good thermal cracking performance of the material. General use of semi-steel, high chrome steel, high-speed steel and other materials.
Finishing section work rolls (F1-4): finishing section work rolls have high temperature and large load. Generally use cast semi-steel and high chromium centrifugal composite cast iron and other materials. High chrome centrifugal composite cast iron has high wear resistance and resistance to thermal cracking of the roll surface, and can inhibit the roll surface spot band defects.
Finishing rolls (F5-7): finishing rolls are used in the final stage of rolling, product quality, surface condition has a very important impact. Roll performance needs are mainly high hardness, wear resistance, resistance to indentation, resistance to spalling and resistance to thermal cracking, generally choose unlimited cold hard cast iron (ordinary, improved) and other materials.
2. Support rolls, the choice of material rolls
Whether for roughing or finishing support rolls are required to have good resistance to thermal cracking, wear resistance, fatigue resistance and high strength. Materials generally choose composite cast steel, alloy forging steel (Cr3, Cr5) and other materials.

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