PROCESS AND DEVICE FOR PRODUCING A STEEL STRIP WITH THE PROPERTIES OF A COLD-ROLLED PRODUCT

摘要

The invention relates to a process for producing cold-rollable steel strip consisting of the sequential steps: a) a thin slab 30 to 100 mm thick (solidification thickness) is produced from a steel melt by continuous casting; b) the thin slab produced by step a) is descaled; c) the descaled thin slab is hot-rolled at temperatures in the region of 1150 to 900 ~C to reduce its thickness by at least 50 % to provide an intermediate strip with a maximum thickness of 20 mm; d) the semi-finished strip is cooled quickly aft er hot-rolling; e) the cooled semi-finished strip is isothermally rolled at 850 to 600 ~C on a finishing train with at least three stands into strips with a maximum thickness of 2 mm; f) the isothermally rolled steel strip is then fa st- cooled to a temperature of 100 ~C at the most and preferably coiled up as th e finished strip. The invention also relates to a device for implementing the process.