Mannesmann Aktiengesellschaft

Sms Demag Ag

Mannesmann Aktiengesellshcaft

Mannesmannufer Aktiengesellschaft

Ingo Von Hagen

Fritz-Peter Pleschiutschnigg

Tarek El Gammal

Lothar Parschat

Christoph Prasser

Peter Lorenz Hamacher

Fritz P Pleschiutschnigg

Michael Vonderbank

Dieter Stalleicken

Rolf K Popperling

Ulrich Menne

Wolfgang Bleck

Paul Splinter

Uwe Schmidt

Hans-Georg Hillenbrand

Hubertus Schlerkmann

Werner Rahmfeld

Harald Wehage

Wilhelm Nickel

Uwe Quitmann

Ulrich Hoffmann

Klaus Bruckner

Gerhard Knauf

Walter Bendick

Gerd Homberg

Gerd Junker

Dieter Vespermann

Enno Wieting

Markus Ring

Bernhard Vogelsang

Klaus Haarmann

Oliver Richard Picht

Winfried Binder

Ulrike Zeislmair

Gamal Mohamed Megahed

Walter Weischedel

Fritz-Peter Pleschuitschnigg

Bernhard Hoffmann

Johannes Arndt

Heinz Muller

Gerd Heinz

A process and device for the production of continuously cast billets in a production plant employs a vertical, round strand-casting machine with horizontal run-out, at least one descaling device, and several following roll stands. For the production of round billets with diameters in the range of 90-300 mm, after the solidifying round billet has left the mold but before it has entered the following rolling unit, its surface is descaled and the area near the surface is cooled in defined manner to a temperature which is optimum for the grade of steel in question before the round billet is worked, first over the course of at least three successive horizontal passes then in a vertical pass, the surface of the preworked billet being descaled again before the last pass.

Method of producing round billets

A steel pipe, includes an outer corrosive-preventive protective sheath, which has a surface layer of plastic material, and a crack stopper zone extending over a section of the pipe. The crack stopper zone includes a bandage which is wrapped around the pipe section and made of high-strength fiber material imbedded in a compacted matrix of thermoplastic and thermosetting plastic. The bandage is comprised of a plurality of wound layers joined to one another via the matrix by welding or gluing.

Pipe with crack stopper feature, and process of protecting a pipe against propagation of cracks

A device and a process for producing thin steel metal bars in which an elongated metal product is brought into contact with a molten metal causing the latter to crystallize. Different materials are used for the elongated metal product and the molten metal, whereby one of the materials is a stainless steel. A temperature of the elongated metal product, a temperature of the molten metal and a dwelling time of the elongated metal product in the molten metal are set in such a way that the molten metal crystallizes on the elongated metal product so as to form a layer having a thickness of 2% to 20% of a thickness of the elongated metal product.

Process and device for producing thin metal bars

Process and device for producing metallic composite materials

Floor lead-through element for an inversion casting vessel

An apparatus and a process for making semi-finished products in the form of ti metal bars having a width-gauge ratio of over 60 and a maximum sheet metal gauge tolerance of 2%. A metal profile is fed continuously and upwardly through a pool of melt material having the same composition as the metal profile so as to form a coated metal profile. The metal profile is fed at a rate which would result in a coated metal profile having a thickness of at least three times that of the uncoated metal profile. The coated metal profile is subjected to a smoothing pass between a pair of smoothing rolls when the mean temperature in the crystallized layer of the coated metal profile meets a given condition. The smoothing rolls are adjustably disposed inside a housing at a distance of 0.5 to 5 m from the melt pool surface.

Device for making semi-finished products

Process and device for the continuous production of sheet metal strips

Molten steel is poured into a water cooled continuous casting mold in which the steel solidifies partially with the formation of a strand having a length and a peripheral shell. The strand has a cross-sectional surface area with one of a round shape, an oval shape and a polygonal shape having more than four sides. Additionally, the strand has a minimum circumference of 200 mm. The cross-sectional surface area of the strand leaving the mold is then reduced using rolls before the strand fully solidifies. The reducing includes deforming the strand into a polygonal shape having at least four corners while maintaining the circumference as well as the length of the strand at the peripheral shell constant.

Method of producing long steel products

Process and device for producing a steel strip with the properties of a

Process for making semi-finished products

A high-temperature steel for boiler making having improved creep strength and low tendency to hardening in welded condition, having the following melt analysis (wt. %): C 0.050 to 0.100% Si 0.15 to 0.45% Mn 0.30 to 0.70% P .ltoreq.0.020% S .ltoreq.0.010% Al .ltoreq.0.020% Cr 2.20 to 2.60% Mo 0.90 to 1.10% V 0.20 to 0.30% Ti 0.05 to 0.10% B 0.0015 to 0.0070% N .ltoreq.0.01% The balance of the steel is comprised of iron and ordinary impurities. The steel is annealed for a period of about 30 to about 60 minutes at about 980.degree. C. to about 1040.degree. C., thereupon cooled in air, and then tempered for at least one hour at about 730.degree. C. to about 760.degree. C.

High-temperature steel for boiler making

Weldable high-strength structural steel with 13% chromium

An air hardening steel which is killed during casting used as material for manufacturing structural tubes for structural elements which are subjected to high mechanical loads, particularly for door reinforcements in the manufacture of automobiles. The steel is composed of in percent by weight:

Hot rolled and air hardened steel for manufacturing structural tubes and

An economical steel for a reinforcement tube which steel meets the minimum requirements for reinforcement tubes, has a composition as follows: 0.15-0.25 % Carbon, 3.40-6.10 % Manganese, 0-1.0 % Nickel, 0-1.0 % Chromium, 0-1.0 % Molybdenum, 0-0.15 % Vanadium, max. 0.03 % Phosphorous, max. 0.03 % Sulfur, max. 0.6 % Silicon, max. 0.05 % Aluminum, with the remainder being iron and usual impurities, such that the sum total of the content of manganese, nickel, chromium, molybdenum and ten times the content of vanadium equals at least 4.5 wt. %.

Steel reinforcement tube

Method of manufacturing plated hollow blocks

Growing community of inventors

Krefeld, Germany

Ingo Von Hagen