High-strength manganese-containing steel, use of the steel for flexibly rolled flat steel products and production methods together with flat steel product for this purpose

摘要

The invention relates to a high-strength manganese-containing steel, in particular for producing a flexibly rolled flat steel product in the form of a hot or cold strip, with the following chemical composition (in% by weight): C: 0.005 to 0.6; Mn: 4 to 10; Al: 0.005 to 4; Si: 0.005 to 2; P: 0.001 to 0.2; S: to 0.05; N: 0.001 to 0.3; Remainder of iron including unavoidable steel-supporting elements, with optional addition of one or more of the following elements (in% by weight): Sn: 0 to 0.5; Ni: 0 to 2; Cu: 0.005 to 3; Cr: 0.1 to 4; V: 0.005 to 0.9; Nb: 0.005 to 0.9; Ti: 0.005 to 0.9; Mo: 0.01 to 3; W: 0.1 to 3; Co: 0.1 to 3; B: 0.0001 to 0.05; Zr: 0.005 to 0.5; Ca: 0.0002 to 0.1, which has a good combination of strength, elongation and forming properties. The invention also relates to a use of this steel for producing a flexibly rolled flat steel product, a method for producing a flat steel product from this steel and a flat steel product produced by this method.