Metallic flat product which is subjected to surface finishing by hot-dip coating and which is preferably composed of steel

US10081857B2 · kind B2 · utility

Assignee

• ThyssenKrupp Steel Europe AG · DE

Inventors

• Jegor Bergen · Rheinberg, DE
• Frank Spelleken · Dinslaken, DE
• Michael Peters · Kleve, DE
• Manuela Ruthenberg · Dortmund, DE
• Friedhelm Macherey · Alpen, DE
• Florian Spelz · Oberhausen, DE

Key dates

• Filing date: Jan 6, 2014
• Grant date: Sep 25, 2018
• Expiry date: Jan 6, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A metallic flat product is disclosed which is subjected to surface finishing by hot-dip coating and which is preferably composed of steel. The metallic flat product includes a metallic alloy layer (11) and a metallic surface layer (12′), which metallic alloy layer and metallic surface layer differ from one another in terms of their chemical composition. The two layers (11, 12′) are produced in a one process step and define a continuous transition region (13) in which a mixture of the two different chemical compositions is present. The metallic alloy layer (11) has a thickness of less than 8 μm, preferably less than 6 μm, and the surface layer (12′) is formed from aluminum or zinc. The flat product has an improved coating, by means of which the flat product more effectively satisfies the requirements with regard to good deformability and has good anti-corrosion protection.