Arcelormittal

Arcelormittal France

Hubert Saint-Raymond

Didier Dauchelle

José Veg

Jose Veg

Florence Bertrand

Jonas Staudte

Didier Huin

Michel Roger Louis Bordignon

Pauline Briault

Thierry Hourman

An apparatus for the continuous hot dip coating of a metal strip is provided. The apparatus includes a vessel intended to contain a liquid metal bath, a bottom roller and a displacement casing for the metal strip. The casing includes an upper portion and a lower portion. The lower portion includes a pouring box delimiting at least two liquid metal pouring compartments. Each pouring compartment is inwardly delimited by an inner wall including an upper rim. The casing is provided with the pouring box, is rotatable relative to the metal strip around a first rotation axis and the pouring box is rotatable relative to the upper portion of the casing around a second rotation axis. A method for coating the metal sheet is also provided.

Apparatus for the continuous hot dip coating of a metal strip including rotatable pouring box and associated method

A method for producing a metallic coated steel sheet is provided. The method includes continuously annealing a steel sheet in a continuous annealing furnace and hot dip coating the steel sheet.

Method for producing a metallic coated steel sheet

An apparatus for the continuous hot dip coating of a metal strip is provided The apparatus includes a vessel intended to contain a liquid metal bath, a bottom roller and a scroll casing of the metal strip. The casing includes, at its lower end, a pouring box delimiting a front pouring compartment for liquid metal and a rear pouring compartment for liquid metal. Each pouring compartment is inwardly delimited by an inner wall and outwardly delimited by an outer wall. The outer wall of the rear pouring compartment forms, with the passage plane of the metal strip, an angle greater than or equal to 15&#xb0; in the usage configuration. A method is also provided.

Apparatus for the continuous hot dip coating of a metal strip with rear pouring compartment optimally angled with the passage plane of the metal strip

The invention deals with a process for manufacturing a hot-dip galvanized or galvannealed steel sheet having a TRIP microstructure, said process comprising the steps consisting in: -providing a steel sheet whose composition comprises, by weight: 0.01&#x2266;C&#x2266;0.22%, 0.50&#x2266;Mn&#x2266;2.0%, 0.2&#x2266;Si&#x2266;2.0%, 0.005&#x2266;Al&#x2266;2.0%, Mo&#x3c;1.0%, Cr&#x2266;1.0%, P&#x3c;0.02%, Ti&#x2266;0.20%, V&#x2266;0.40%, Ni&#x2266;1.0%, Nb&#x2266;0.20%, the balance of the composition being iron and unavoidable impurities resulting from the smelting, -oxidizing said steel sheet in a direct flame furnace where the atmosphere comprises air and fuel with an air-to-fuel ratio between 0.80 and 0.95, so that a layer of iron oxide having a thickness from 0.05 to 0.2 &#x3bc;m is formed on the surface of the steel sheet, and an internal oxide of Si and/or Mn and/or Al is formed, -reducing said oxidized steel sheet, at a reduction rate from 0.001 to 0.010 &#x3bc;m/s, in order to achieve a reduction of the layer of iron oxide, -hot-dip galvanising said reduced steel sheet to form a zinc-coated steel sheet, and -optionally, subjecting said hot-dip coated steel sheet to an alloying treatment to form a galvannealed steel sheet.

Process for manufacturing a galvanized or a galvannealed steel sheet by DFF regulation

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Metz, France

Hubert Saint-Raymond