Cold-rolled metal strip of required hardness prodn. - involves forming rough strip and then rolling it to finished form with predetermined nominal thickness

摘要

Prodn. of cold rolled strip made from non-ferrous or ferrous metals or their alloys, involves the prodn. of a rough strip in a roller stand having a wider rolling thickness finishing tolerance than that of the finishing roller. A rough strip is produced with a rolling thickness between an upper boundary value (DO) and a lower value (DU). The upper value (DU) is selected so that the prescribed max. hardness and strength of the finished strip is adhered to on the basis of strength values determined for such a degree of deformation when the rough strip is converted into the finished strip with a rough thickness (DO) corresponding to the upper boundary value. The finished strip thickness corresponds to the nominal thickness reduced by the rolling thickness finishing tolerance of the finishing roller stand. In a similar way, the lower boundary value is determined.