METHOD FOR HEAT TREATING ROLLED STOCK AND DEVICE TO ACHIEVE THE METHOD

摘要

Method for heat treating rolled stock leaving a rolling train, wherein the rolled stock undergoes a rapid cooling treatment in a rapid cooling assembly located immediately downstream of the last rolling pass, the first cooling step being followed by a temperatureequalisation step in air and at least by a second cooling treatment before being discharged and collected, the temperature-equalisation step in air and the at least second cooling treatment being set so as not to modify the surface and inner crystalline structure of the rolled stock which has formed at the outlet of the first cooling treatment, the at least second cooling treatment being followed by a short segment of temperature-equalisation in air and then directly by the collection of the rolled stock into compact form, such as rolls, coils, bundles or packs, wherein the slow cooling of the rolled stock collected in compact form leads to the transformation of the crystalline structure in the stable structures. Device for heat treating rolled stock achieving the method as described above.