Sollac

Usinor

Thyssen Stahl Ag

Usinor Sacilor

Arcelor France

Christian Marchionni

Jean-Michel Damasse

Michel Faral

Patrice Vicente

Fran&ccedil;oise Commarieu

Fran&ccedil;ois Poirier

Jacques Selaries

Manuel Bobadilla

Fr&eacute;d&eacute;ric Mazurier

Philippe Paradis

Yann Le Papillon

Alain Leclercq

Philippe Rocabois

Fr&eacute;d&eacute;ric Descaves

A metallurgical product, made of carbon steel and to be galvanized, which is in the form of a strip or of a sheet obtained from a continuously cast intermediate product having the following composition by weight: 0.0005%&#x2266;C&#x2266;0.15%; 0.08%&#x2266;Mn&#x2266;2%; Si&#x2266;0.040%; Al&#x2266;0.010%; Al&#x2266;0.004%; 0.0050%&#x2266;O&#x2266;0.0500%; P&#x2266;0.20%; S&#x2266;0.10%; each of Cu, Cr, Ni, Mo, W, Co&#x2266;1%; each of Ti, Nb, V, Zr&#x2266;0.5%; each of Sn, Sb, As&#x2266;0.1%; B&#x2266;0.1%; N&#x2266;0.0400%; and the remainder being iron and impurities. Also, a process for obtaining a metallurgical intermediate product, which includes: producing in a ladle a liquid steel the composition of which is as above, and in which the dissolved oxygen content is maintained between 0.0050 and 0.0500% by the establishment of a chemical equilibrium between the metal and the ladle slag; and casting the steel on a continuous casting machine.

Metallurgical product of carbon steel, intended especially for galvanization, and processes for its production

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&lE;0.08%; %Si&lE;1; %P&lE;0.04; %Mn&lE;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 (%)&equals;%Cr&plus;1.37 %Mo&plus;1.5 %Si&plus;2%Nb&plus;3 %Ti; Ni (%)&equals;%Ni&plus;0.31 %Mn&plus;22 %C&plus;14.2 %N&plus;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.

Method for continuously casting between two rolls austenitic stainless steel strips with excellent surface quality and resulting strips

A process for manufacturing carbon-steel strip having a thickness of less than or equal to 10 mm directly from liquid steel, by casting said liquid steel between the lateral surfaces, made of copper or copper alloy, of two internally cooled rotating horizontal rolls.

Process for manufacturing carbon-steel strip by twin-roll continuous casting, product produced and apparatus

The subject of the invention is a process for the continuous casting of an austenitic stainless steel strip directly from liquid metal of composition, expressed in percentages by weight: C.ltoreq.0.08%, Si.ltoreq.1%; Mn.ltoreq.2%; P.ltoreq.0.045%; S.ltoreq.0.030%; Cr between 17.0 and 20.0%; Ni between 8.0 and 10.5% on a machine for casting onto one or between two moving walls whose external surface is provided with dimples and in which the region surrounding the meniscus is inerted with an inerting gas of controlled composition, wherein:

Process for the continuous casting of an austenitic stainless steel

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Rosselange, France

Christian Marchionni