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:
Mar. 14, 2017
Filed:
Feb. 10, 2011
Daniela John, Hannover, DE;
Manuel Otto, Cremlingen, DE;
Rune Schmidt-jürgensen, Hannover, DE;
Thomas Evertz, Peine, DE;
Zacharias Georgeou, Wolfsburg, DE;
Bianca Springub, Hannover, DE;
Daniela John, Hannover, DE;
Manuel Otto, Cremlingen, DE;
Rune Schmidt-Jürgensen, Hannover, DE;
Thomas Evertz, Peine, DE;
Zacharias Georgeou, Wolfsburg, DE;
Bianca Springub, Hannover, DE;
SALZGITTER FLACHSTAHL GMBH, Salzgitter, DE;
Abstract
A method for producing a workpiece having properties which are adjustable across a wall thickness or strip thickness of the workpiece, includes the steps of subjecting the workpiece to a decarburizing annealing treatment under an oxidizing atmosphere and to an accelerated cooling and/or a cold forming for generating a property gradient of the workpiece, wherein the workpiece is made of an austenitic lightweight steel which has an alloy composition which includes by weight percent 0.2% to 1% carbon, 0.05% to<15% aluminum, 0.05% to 6.0% silicon, 9% to<30% manganese, and at least one element selected from the group consisting of chromium, copper, boron, titanium, zirconium, vanadium and niobium, wherein chromium=4.0%; titanium+zirconium=0.7%; niobium+vanadium=0.5%, boron=1%, the remainder iron including common steel companion elements.