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Thyssenkrupp Stahl Ag

Frank Friedel

Ulrich Urlau

Wolfgang Reichelt

Wilhelm Schmitz

Dieter Senk

Wolfgang Bleck

Paul Splinter

Horst Berndsen

Oliver Picht

Manfred Meurer

Rolf B&uuml;nten

Sabine Zeizinger

Michael Westholt

The present invention relates to a method for the manufacture of galvannealed metal sheet, wherein a hot strip is produced from an IF steel containing 0.01 to 0.1 wt. % silicon, wherein the hot strip is coiled at a coiler temperature no lower than 700&#xb0; C. and no higher than 750&#xb0; C., wherein a cold strip is rolled from the coiled hot strip, wherein the cold strip is recrystallization-annealed in an annealing furnace in an annealing gas atmosphere, wherein the cold strip thus annealed is provided with a zinc coating in a zinc bath, and wherein the coated cold strip is post-annealed at a galvannealing temperature no lower than 500&#xb0; C. and no higher than 540&#xb0; C. The invention also relates to a galvannealed metal sheet which possesses improved adhesion of the coating layer to the base material and proposes a method which is suited for the manufacture of metal sheet having such properties.

Galvannealed metal sheet and method for manufacture of such metal sheet

The invention relates to a method and a device for the production of a strip-like metallic composite material by the high-temperature dip coating of a metallic carrier strip, consisting of a metallurgic vessel for receiving the liquid depositing material, through which the carrier strip is capable of being led in a preferably vertical run-through direction by means of pairs of rollers arranged on the entry and the exit side, and of a preheating device for the carrier strip, said preheating device being located upstream of the metallurgic vessel. At the same time, the preheating device ( ) is arranged in a housing ( ) which is arranged in the entry region upstream of the metallurgic vessel ( ) and surrounds the carrier strip ( ) and into which the medium coming from a media supply ( ) is capable of being introduced via at least one feed ( ) led into the housing.

Method for producing a strip-like metal composite by high temperature dip coating

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Moers, Germany

Frank Friedel