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AssigneesUsinor Sacilor, Thyssen Stahl AG, Thyssen Edelstahlwerke AG
InventorsPhilippe Demarez, Jean-Michel Hauser
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The method comprises effecting the solidification of the metal in a continuous casting ingot mould constituted by two cooled rolls (2) rotating in opposite directions and disposed in confronting relation so as to define a casting space therebetween, continuously extracting from the ingot mould a solidified steel strip (3), and, below the ingot mould, subjecting the strip to a quenching medium (6) so as to cool it sufficiently rapidly to prevent formation of austenite. This medium may be formed by a quenching bath placed in a container (4) disposed under the rolls (2) and having a bottom provided with an opening (5) for the passage of the solidified strip (3). The quenching medium may also be formed by an inert gas in the liquid state blown onto the product by nozzles. The steel strips obtained are easier to shear and coiled at the output end of the casting line owing to the absence of martensite in the ferritic matrix.
A method for manufacturing a semi-ferritic stainless steel strip from a bath of molten metal, said method comprising effecting a solidification of said metal in a continuous casting ingot mould comprising two cooled rolls rotating in opposite directions and disposed in confronting relation so as to define a casting space therebetween, continuously extracting a strip of solidified steel from said ingot mould, and, below said ingot mould, subjecting said strip to a quenching medium so as to rapidly cool said strip for a sufficient period of time to prevent formation of austenite.
Dependencies are inferred from the claim text.