Usinor

Unimetal - Societe Francaise Des Aciers Longs

Florence Bertrand

Christian Gatellier

Francois Stouvenot

Laurent Sosin

Jean Lehmann

James Naylor

According to this treatment, calcium is added to ultra low molten steel or low carbon which is aluminum killed (or in the course of being killed) in order to form non-metallic deoxidation inclusions that have a melting point which is below the casting temperature; the molten metal is maintained in the chain of treatment ranging from the ladle refining installation to the copper mold with a low minimum low magnesium content of approximately 2 ppm. The inventive method increases the scope of fusibility of the inclusionary population of steels, thereby improving the castability of high aluminum-killed ultra low carbon grades without the need for argon bubbling.

Treatment for improving the castability of aluminum killed continuously cast steel

The subject of the invention is a process for the continuous casting of very small-diameter wires directly from liquid metal, according to which said liquid metal is made to flow out of a heated and pressurized container made of refractory material, forming a jet of liquid. metal having a diameter equal to or slightly greater than that of the wire to be cast, and said jet is made to solidify by making it penetrate into a layer of moving cooling liquid deposited on the internal wall of a drum rotating about a horizontal axis, wherein said container is fed, continuously or intermittently, with solid metal without interrupting casting and wherein said solid metal is melted inside said container. The subject of the invention is also a device for the continuous casting of very small-diameter wires directly from liquid metal, allowing this process to be implemented. Figure for the abstract: Single figure

Process and device for the continuous casting of very small-diameter

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Metz, France

Florence Bertrand