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:
Nov. 12, 2002
Filed:
Jul. 03, 2000
Mohamed Bouzekri, Rombas, FR;
Sollac, Puteaux, FR;
Abstract
A process for manufacturing an aluminum-killed low-carbon steel strip by supplying a hot-rolled steel strip having by weight from 0.022 to 0.035% of carbon, from 0.15 to 0.25% of manganese, from 0.040 to 0.70% of aluminum, from 0.0035 to 0.0060% of nitrogen, the remainder being iron and trace impurities, passing the strip through a first cold-rolling, annealing the cold-rolled strip, in which the annealing is continuous using a cycle including: a temperature rise up to a first temperature higher than an onset temperature of pearlitic transformation Ac , holding the strip above the first temperature for a duration of longer than 10 seconds, rapidly cooling the strip to a second temperature below 100° C. at a cooling rate in excess of 100° C. per second, thermally treating the strip at a temperature from 100° C. to 350° C. for a duration in excess of 10 seconds, and cooling the strip to room temperature.