Patent · US Active

Method for coating steel sheets or steel strips and method for producing press-hardened components therefrom

US11613791B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

Salzgitter Flachstahl GmbH · DE

Inventors

Frank Beier · Duisburg, DE
Kerstin Körner · Duisburg, DE
Marc Debeaux · Braunschweig, DE

Key dates

Filing date	Feb 14, 2018
Grant date	Mar 28, 2023
Priority date	—
Expiry date	Feb 18, 2040

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25D7/0614
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a method for coating a steel sheet or steel strip to which an aluminium-based coating is applied in a dip-coating process and the surface of the coating is freed of a naturally occurring aluminium oxide layer. In order to provide a low-cost method for coating steel sheets or steel strips that makes the steel sheets or steel strips outstandingly suitable for the production of components by means of press hardening and for the further processing thereof, it is proposed that transition metals or transition metal compounds are subsequently deposited on the freed surface of the coating to form a top layer. The invention also relates to a method for producing press-hardened components from the aforementioned steel sheets or steel strips with an aluminium-based coating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.