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.:
Date of Patent:
Jan. 12, 2016
Filed:
Dec. 03, 2010
Wilhelm Warnecke, Hamminkeln, DE;
Manfred Meurer, Rheinberg, DE;
Jens Kondratiuk, Buchs SG, CH;
Marc Blumenau, Hagen, DE;
Martin Norden, Essen, DE;
Thiemo Wuttke, Recklinghausen, DE;
Wilhelm Warnecke, Hamminkeln, DE;
Manfred Meurer, Rheinberg, DE;
Jens Kondratiuk, Buchs SG, CH;
Marc Blumenau, Hagen, DE;
Martin Norden, Essen, DE;
Thiemo Wuttke, Recklinghausen, DE;
ThyssenKrupp Steel Europe AG, Duisburg, DE;
Abstract
A readily formable flat steel product has a ductile edge layer that is from 10 to 200 μm thick and has a ductility greater than a ductility of an inner core layer of the flat steel product. The readily formable flat steel product is produced by annealing a flat steel product having a C content of from 0.1 to 0.4% by weight in a continuous furnace. The annealing is carried out under an annealing atmosphere that contains from 0.1 to 25% by vol. of Hand HO, with the balance being Nand technically unavoidable impurities. A dew point is between −20° C. and +60° C., and a ratio of HO/His a maximum of 0.957. In the course of the annealing, the flat steel product is heated to a holding temperature of from 600 to 1100° C. and for a holding time of from 10 to 360 seconds.