Ferritic rolling with additional annealing to produce a deep-drawable ultra-thin-gauge hot strip

In order to produce ultra-thin hot strips by ferritic rolling, that exhibit a good deep-drawability, finishing temperatures must be reduced, so that an additional recrystallization annealing of hot strips after coiling becomes necessary. In the present work laboratory investigations were carried out on a commercial IF and ELC steel by using the hot deformation simulator Wumsi. By means of texture measurement and the calculation of r-values the process parameters of the ferritic rolling and of a subsequent annealing were optimized. Additionally to a conventional annealing of cold coils a new energy saving processing route with direct charging of warm coils was tested by the laboratory simulation. Particularly good deep-drawabilty were achieved by this technology.