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:
Dec. 24, 2019
Filed:
Feb. 13, 2014
Thyssenkrupp Steel Europe Ag, Duisburg, DE;
THYSSENKRUPP STEEL EUROPE AG, Duisburg, DE;
Abstract
A cold-rolled flat steel product for deep drawing applications including in addition to Fe and unavoidable impurities (in % by weight) C: 0.008%-0.1%, Al: 6.5%-12%, Nb: 0.1%-0.2%, Ti: 0.15-0.5%, P: <0.1%, S: <0.03%, N: <0.1% and optionally one or more elements from the group of Mn, Si, REM, Mo, Cr, Zr, V, W, Co, Ni, B, Cu, Ca, N, where 2.5≥% Ti/% Nb≥1.5. Also a method of producing such a flat steel product including casting a pre-product, which is then hot-rolled into a hot strip with a hot rolling end temperature of 820-1000° C. and wound at a winding temperature of up to 750° C. After winding, the hot strip is annealed at an annealing temperature of >650-1200° C. for 1-50 h, then cold-rolled in one or more stages with a total cold rolling level of ≥65% and finally annealed at 650-850° C.