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:
May. 07, 2019
Filed:
Mar. 18, 2015
Thyssenkrupp Steel Europe Ag, Duisburg, DE;
Thyssenkrupp Ag, Essen, DE;
Alexander Gaganov, Mülheim an der Ruhr, DE;
Wolfgang Gervers, Duisburg, DE;
Andreas Kern, Ratingen, DE;
Gabriel Kolek, Witten, DE;
Elena Schaffnit, Düsseldorf, DE;
Hans-Joachim Tschersich, Dorsten, DE;
THYSSENKRUPP STEEL EUROPE AG, Duisburg, DE;
THYSSENKRUPP AG, Essen, DE;
Abstract
Methods for producing flat steel product with a yield strength of at least 700 MPa and an at least 70% by volume bainitic microstructure may comprise several steps. For example, one method may involve smelting a steel melt including in percent by weight 0.05-0.08% C, 0.015-0.500% Si, 1.60-2.00% Mn, 0.025% P, up to 0.010% S, 0.020-0.050% Al, up to 0.006% N, 0.40% Cr, 0.060-0.070% Nb, 0.0005-0.0025% B, 0.090-0.130% Ti, unavoidable impurities, and Fe. The may further involve casting the melt to give a slab, reheating the slab, rough-rolling the slab, hot finish-rolling the rough-rolled slab, cooling the hot-finish-rolled flat steel product within ten seconds of hot finish-rolling, and coiling the hot-finish-rolled flat steel product.