Arcelormittal

Centre De Recherches Metallurgiques Asbl

Jean-Francois Noville

Michel Roger Louis Bordignon

Pascal Gerkens

Ana Isabel Farinha

Xavier Marc Jacques Edmond Robert Vanden Eynde

Maiwenn Tifenn Soazig Larnicol

Julien Christopher Michel Smal

Michel Roger Bordignon

Maiwenn Tifenn Larnicol

Xavier Marc Vanden Eynde

Julien Christopher Smal

Hugo Uijtdebroeks

Patrick Van Poecke

Dirk Vanderschueren

A method of treatment of a running ferrous alloy sheet containing at least one easily oxidized element is provided. The method includes a step of immersion of the sheet in a molten oxides bath. The molten oxides bath has a viscosity between 0.3.10Pa&#xb7;s and 3.10Pa&#xb7;s, the surface of the bath is contact with a non-oxidizing atmosphere, and the molten oxides are inert towards iron. The residence time of the running sheet in the bath is at least 1 s and the residues of oxides remaining on the surfaces of the sheet at the exit of the bath are eliminated. A treatment line of a ferrous alloy sheet for implementing the method, is provided. The treatment line includes a molten oxides bath having a viscosity between 0.3.10and 3.10Pa&#xb7;s. The surface of the bath is contact with a non-oxidizing atmosphere, and the molten oxides are inert towards iron. Mechanical devices for eliminating the residues of molten oxides remaining on the surfaces of the ferrous alloy sheet are at the exit of the molten oxides bath.

Method of treatment of a running ferrous alloy sheet and treatment line for its implementation

A thermal treatment process of a ferrous alloy sheet is provided. The process includes the step of performing a thermal treatment on said sheet when running, by immersing it into at least one molten oxides bath. The molten oxides bath has a viscosity lower than 3&#xb7;10Pa&#xb7;s, the surface of the bath is in contact with a non-oxidizing atmosphere and the molten oxides are inert towards iron. The difference between the temperature of the ferrous alloy sheet at the entry of the bath and the temperature of the bath is between 25&#xb0; C. and 900&#xb0; C. The residues of oxides remaining on the surfaces of the ferrous alloy sheet at the exit of the bath are eliminated. A device for implementing this process is also provided.

Thermal treatment process of a steel sheet and device for its implementation

(EN) The present invention relates to a device for cooling a working roll () belonging to a rolling stand used for rolling a long or flat product (), characterized in that it comprises a cooling head in the form of a box section (A,B) that is sealed except along a front face () lying a short distance from said roll (), and in which face a plurality of nozzles () has been machined or positioned in a determined pattern, said box section (A,B) being concave and cylindrical at its front face (). The box section (A,B) is also fitted with transverse () and lateral () plates which collaborate with the front face () of the box section so as to control the flow of cooling liquid and confine said liquid in the form of a highly turbulent flow. This then yields optimal cooling of the roll both in terms of the uniformity of the cooling across the surface thereof and in terms of the reduction in temperature as a result of the turbulent effect created.

Device and method for cooling rollers used for rolling in a highly turbulent environment

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Milmort, Belgium

Jean-Francois Noville