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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9040167 B1

PDFFull Text
Date of Patent:
May. 26, 2015

Filed:

May. 20, 2010

Method for the production of a flat steel product and flat steel product

Applicants:

Bernd Schuhmacher, Dortmund, DE;

Christian Schwerdt, Duisburg, DE;

Nicole Weiher, Bochum, DE;

Richard Weinhold, Neuss, DE;

Inventors:

Bernd Schuhmacher, Dortmund, DE;

Christian Schwerdt, Duisburg, DE;

Nicole Weiher, Bochum, DE;

Richard Weinhold, Neuss, DE;

Assignee:

ThyssenKrupp Steel Europe AG, Duisburg, DE;

Attorney:

The Webb Law Firm

Primary Examiner:

Michael E La Villa

Int. Cl.
CPC ...
B32B 15/01 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); C25D 7/06 (2006.01); C25D 5/50 (2006.01); C23C 14/02 (2006.01); C23C 30/00 (2006.01); C22C 1/02 (2006.01); C22C 38/00 (2006.01); C23C 14/16 (2006.01); C23C 14/58 (2006.01); C23C 28/02 (2006.01);
U.S. Cl.
CPC ...
C23C 14/025 (2013.01); Y10T 428/12736 (2015.01); Y10T 428/12757 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/265 (2015.01); Y10T 428/12799 (2015.01); Y10T 428/12729 (2015.01); C23C 30/005 (2013.01); C25D 7/0614 (2013.01); B32B 15/18 (2013.01); B32B 15/20 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); C22C 1/02 (2013.01); C22C 38/00 (2013.01); C23C 14/16 (2013.01); C23C 14/5806 (2013.01); C23C 28/023 (2013.01); C25D 5/50 (2013.01); C23C 28/021 (2013.01); C23C 28/025 (2013.01); C23C 28/028 (2013.01);
Abstract

A flat steel product having a base layer of a steel material and a multilayer coating applied thereto, and a method for producing the flat steel product. The method having the following steps: providing a steel base layer; applying a zinc layer to the base layer by electrolytic coating; applying an aluminum layer to the surface of the zinc layer, wherein no treatment is made to the surface of the zinc layer in regard to the oxides and sulfides present thereon at the end of the electrolytic zinc coating step or occurring during the course of the aluminum coating step; applying a magnesium layer to the aluminum layer; and subsequently heat treating the flat steel product in such a way that an MgZnlayer forms in the coating above the Al layer.

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