The essence of the back-up roll is to support the work roll, which can reduce the diameter of the work roll and enhance the stiffness of the work roll by touching the rolling piece. The back-up roll is an important part in the rolling mill, which is used to support the work roll or the intermediate roll to prevent the work roll from bending and affecting the output and quality of the plate and strip. The quality characteristics of back-up roll are high surface hat, gutpela hat yunifomiti, dip hating leit bilong rol bodi, gutpela strong na hat bilong rol nek na bodi na bodi. Ol kwaliti mak bilong bek-ap rol em i bikpela wear resistens, gutpela spalling resistens na strongpela eksiden resistens.
Rol bilong bek em i wanpela bikpela hap long roling mil, we ol i yusim long sapotim wok rol o namel rol long stopim wok rol long bendim na afektim autput na kwaliti bilong plet na strip. Ol kwaliti mak bilong bek-ap rol em i hai pes hatnes, gutpela hatnes yunifomiti, gutpela hat bilong rol bodi, gutpela strong na strong bilong rol nek na bodi na bodi bilong rol na bodi i pilim olsem em i wok bilong rol nek na bodi i pilim olsem. Ol i save sakim strong na strongpela eksiden resistens. Wantaim divelopmen bilong kol na hot roling mil i go long bikpela spit, bikpela skel na bikpela stretpela pasin, diman bilong ol bek-ap rol tu i wok long go antap. Long ol samting bilong kol na hot roling mil bek-ap rol long ol samting, rol bodi hatnes, yunifomiti, dip bilong hat-ap leya na residuel stres, em i gutpela moa long hat-ap leit na residuel stres, em i gutpela moa long strongpela leit na residuel stres, em i gutpela moa long strongpela leit na residuel stres, em i gutpela moa long hatim layer na residuel stres, em i gutpela moa long strongpela leit na residuel stres, em i moa gutpela long strongpela leit na residuel stres, em i moa gutpela long strongpela leit na residuel stres, em i moa gutpela long strongpela leit na residuel stres, em i moa gutpela long strongpela leit na residuel stres, em i moa gutpela long hatim layer na residual stres, em i gutpela moa long strongpela leit na residuel stres, em i gutpela moa long strongpela leit na residuel stres, em i gutpela moa long strongpela leit na residuel stres, em i gutpela moa long hatim layer. steel back-up roll, the forged steel back-up roll has the characteristics of uniform material, better wear resistance and anti-spalling. Large forged steel back-up roll is a high value-added product, because of its high technical requirements, complex process, difficult manufacturing, production process, long cycle and other reasons, only a few enterprises in China can produce, its output can not meet the market demand, resulting in modern cold and hot tandem rolling mill enterprises used large forged steel bek-ap rol i mas dipen long ol impot.
