Method of manufacturing a steel sheet having a multilayer crystallization structure and steel sheet with a multilayer crystallization structure

Abstract

A method for producing a steel sheet with a multilayer crystallisation structure, and a steel sheet, in particular for packaging, with a thickness of preferably less than 0.5 mm and a carbon content, relative to the weight, of 10 to 1000 ppm, and a nitrogen content, averaged over the thickness of the steel sheet, of more than 50 ppm, as well as a multilayer crystallisation structure with a core region and a near-surface region surrounding the core region on both sides. The near-surface region is at least substantially recrystallised and the core region is not or at least not entirely recrystallised.

Dependencies are inferred from the claim text.