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. 25, 2004
Filed:
Jan. 14, 2002
Christian Marchionni, Rosselange, FR;
Frédéric Mazurier, Bethune, FR;
Jean-Michel Damasse, Dusseldorf, DE;
Frédéric Descaves, Isbergues, FR;
Usinor, Puteaux, FR;
Abstract
The invention concerns a method for continuously casting an austenitic stainless steel strip with a thickness not more than 10 mm, directly from liquid metal, between two cooled horizontal rolls, characterised in that: said steel composition in weight proportions comprises: %C≦0.08%; %Si≦1; %P≦0.04; %Mn≦2; %Cr between 17 and 20; %Ni between 8 and 10.5; %S between 0.007 and 0.040; the rest being iron and the impurities resulting from preparation; the ratio Cr /Ni ranges between 1.55 and 1.90 with: Cr (%)=%Cr+1.37 %Mo+1.5 %Si+2%Nb+3 %Ti; Ni (%)=%Ni+0.31 %Mn+22 %C+14.2 %N+Cu; the surface of the rolls comprises contiguous dimples with more or less circular or elliptical cross-section, of diameter between 100 and 1500 &mgr;m and depth between 20 and 150 &mgr;m; the inerting gas surrounding the meniscus is a gas soluble in steel or a mixture of such gases, or consists of at least 50% by volume of such a gas or mixture of gases.