The diploma work examines the flatness of thick AISI 304 steel sheets after hot rolling. The work covers the path of the plate from the hot rolling machine all the way to warehouse, where it reaches room temperature. I specifically studied the hot plate leveler, its operation, and its effect on a flattens of a plate. All tests were performed at the industrial level in the hot rolling department of SIJ Acroni. Roughly, unevenness occurs after hot rolling for two reasons. One is due to mechanical properties during hot rolling and thermal factors from hot rolling to warehouse, where it reaches room temperature. In my work I also described the different types of errors that cause unevenness on the thick metal sheets and the handling procedures for each type of error. Measurements were performed on AISI 304 stainless steel. The goal was to check the flatness of AISI 304 steel at different plastification fraction of thick sheet metal and deformation of the hot leveler.
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