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:
Jun. 24, 2003
Filed:
May. 01, 2001
Thyssen Krupp Stahl AG, Dusseldorf, DE;
Abstract
The present invention concerns a method for the production of cold-rolled bands or sheets from low-alloy steel with a maximum of 0.2% C, Al, Ti, V, Nb respectively and a maximum of 1% Si and Mn respectively, in addition to a portion of boron required for N binding (>0,78×N), the remainder being constituted by iron and unavoidable impurities, wherein said steel is cast after melting to slabs, thin slabs or a band, which are hot-rolled at a starting temperature above 1100° C. and at a final temperature below Ar and wherein the hot band is then drawn and cold-rolled at a temperature below 650° C., whereupon the cold band is annealed independently of the degree of cold-rolling at a low temperature that could possibly vary depending on the composition of the steel and ranging from 520 to 780° C. during a period of time that is sufficiently long to allow for complete recrystallization. The method disclosed makes it possible to simplify manufacturing and to lower production costs associated with the manufacture of a completely recrystallized cold-rolled band or sheet.