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AssigneeUsinor
InventorsChristian Marchionni, Frédéric Mazurier, Jean-Michel Damasse, Frédéric Descaves
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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 Creq/Nieq ranges between 1.55 and 1.90 with: Creq(%)=%Cr+1.37 %Mo+1.5 %Si+2%Nb+3 %Ti; Nieq(%)=%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 μm and depth between 20 and 150 μm; 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.
A process for the continuous casting of an austenitic stainless steel strip having a thickness of less than or equal to 10 mm, directly from liquid metal, between two cooled horizontal rolls, comprising the following steps:
Dependencies are inferred from the claim text.