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:
Jan. 18, 2005
Filed:
May. 05, 2001
Michael Haentjes, Essen, DE;
Michael Haentjes, Essen, DE;
SMS Demag Aktiengesellschaft, Dusseldorf, DE;
Abstract
The invention relates to a method for pickling hot-rolled special steel strips () having an austenite, ferrite and/or martensite structure. The inventive method is carried out in a pickling line () with pickling sections () containing acids and rinsing sections () containing rinsing water (). The aim of the invention is to provide a method that does not require an additional stretch-leveling step for descaling. The costs for pickling are reduced by pickling the hot-rolled special steel strip () in the pickling sections () with hydrochloric acid () and rinsing it in the first rinsing sections () with azotic acid () or an equivalent substitute pickling medium () and treating it in further rinsing sections () with rinsing water ().