The backup roll is an important part of the rolling mill. It is used to support the work roll or the intermediate roll to prevent the work roll from bending and deforming and affecting the output and quality of the plate and strip.

The quality characteristics of the backup roll are high surface hardness of the roll body, good hardness uniformity, deep hardened layer of the roll body, and good strength and toughness of the roll neck and the body and soul of the roll; the quality characteristics of the backup roll are high wear resistance and peeling resistance Good and strong accident resistance.