Patent ID: 11920243
Assignee: THYSSENKRUPP STEEL EUROPE AG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC C

Claim 15:
16. A sheet metal component manufactured from a flat steel product, the steel substrate of which consists of a steel, comprising, in wt. %: 0.05-0.5% C, 0.5-3% Mn, 0.06-1.7% Si, up to 0.06% P, up to 0.01% S, up to 1.0% Al, up to 0.15% Ti, up to 0.6% Nb, up to 0.01% B, up to 1.0% Cr, up to 1.0% Mo, wherein the total of the contents of Cr and Mo is at most 1.0%, up to 0.2% Ca, up to 0.1% V, and as the remainder of iron and unavoidable impurities, which is coated with a corrosion protection coating consisting of, in wt. %: up to 15% Si, in total 0.1-5 wt. % of at least one alkaline earth or transition metal, up to 5% Fe in addition to the total 0.1-5% of at least one alkaline earth or transition metal, and a remainder of Al and unavoidable impurities, wherein a layer of the corrosion protection coating adjoining the steel substrate is an interdiffusion layer (D) consisting of ferrite with an Al content of up to 50 wt. %, wherein in a cross-section of the interdiffusion layer (D), the proportion of the surface covered by pores with a diameter ≥0.1 μm is less than 10% and wherein the surface covered with pores in the interdiffusion layer (D) is <300 μm2 over a measurement length of 500 μm.