Sms Siemag Aktiengesellschaft

Sms Group Gmbh

Sms Mevac Gmbh

Dieter Tembergen

Fritz-Peter Pleschiutschnigg

Dieter Rosenthal

Rainer Teworte

Hans-Jürgen Odenthal

Rainer Joachim Dittrich

Jozef Triplat

The present invention relates to a device for degassing molten steel, comprising an evacuation vessel (), a pouring ladle (), an inlet nozzle () with a gas purging device () arranged therein, and a discharge nozzle (), wherein at its lower edge (), in a radial direction in relation to the central longitudinal axis () of the discharge nozzle (), the discharge nozzle () has at least one bore ().

Device for degassing molten steel with an improved discharge nozzle

A method for producing steel products () with optimum surface quality wherein the molten steel () is produced in a process route () that is selected according to a desired final microstructure (), by melting in a furnace () with an electrode system (), and in a vacuum degassing system; or by melting in a furnace installation () or an individual furnace vessel (), in a ladle furnace (), and in a differential-pressure vacuum degassing system (); or by melting in a furnace () with additions of alloying materials (), a partial-quantity degassing in the ladle furnace (), or a vacuum degassing system () and a ladle degassing ().

Method and installation for producing steel products with optimum surface quality

Disclosed are a method and an installation for producing steel products () having an optimum surface quality, especially extremely low carbon contents (UCL steel or IF steel), nitrogen contents, total oxygen contents, high-strength or stainless steel qualities. According to the invention, the liquid steel is cast into a thin slab () from a process route (, or) that is selected according to the desired final structure () based on an electric-arc furnace (), is descaled, cut into billets () having a partial length, optionally descaled once again, subjected to final descaling downstream from a holding furnace (), milled in a finishing mill train (), rolled up in a rolling station () located downstream from the last finishing mill stand () or downstream from a cooling section (), and the final structure () is adjusted in the cooling section () according to the desired steel quality by cooling on a run-out roller table (), whereupon the rolling stock () is completely rolled up in a second rolling station ().

Method and installation for the production of steel products having an optimum surface quality

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Duisburg, Germany

Dieter Tembergen