Fried Krupp

Vsg Energie - Und Schmiedetechnik Gmbh

Other

Vereinigte Schmiedewerke Gmbh

Gerald Stein

Paul Pant

Johannes Jachowski

Joachim Menzel

Udo Riepe

Peter J Uggowitzer

Heinrich K Feichtinger

Markus O Speidel

Lother Hentz

Marcus O Speidel

Heinz-Albert Weber

Hermann-Josef Skotz

Irina Hucklenbroich

Peter Dahlmann

The invention relates to a method for producing a metal alloy, in which in a vessel at overpressure a certain desired content of an alloying constituent, which is gaseous in its normal state, is fed to said metal alloy. The method is designed such that precise addition by alloying of an alloying constituent which is gaseous per se, to a steel alloy subjected to overpressure in a pressure vessel, is made possible.

Method for controlling and adjusting the concentration of a gas component in a melt and a device for carrying out the same

The invention relates to a steel for foundry roll shells comprising (in % by weight)

Steel for foundry roll shells

The invention relates to an austenitic steel alloy which is corrosion-resistant, tough, non-magnetic and compatible with the skin. The invention also relates to a process for the production of said steel alloy and to uses thereof. The characterizing feature of the invention is a steel containing up to 0.3% C, 2 to 26% Mn, 11 to 24% Cr, more than 2.5 to 10% Mo, 0 to 8% W, more than 0.55 to 1.2% N, up to max 0.5% Ni and max 2 % Si, balance iron.

Austenitic steel alloy

A method of manufacturing high strength and hard metallic composite layer materials by connecting several metal layers with one another, includes forming the metal layers as flat products by rolling from a metal with low base strength, alloying and hardening the flat products over their whole cross-section with a metalloid by heat treatment in a metalloid containing gas atmosphere, then connecting the flat products with one another by diffusion welding. As metalloids preferably nitrogen, boron and carbon are used. Diffusion welding is performed by hot isostatic pressure method.

Method of producing a high strength and hard metallic composite layer

A high strength austenitic steel having a yield strength above 600 N/mm.sup.2 at 02% permanent strain, containing about 0.5 to 1.5% by weight of nitrogen, about 6 to 12% by weight cobalt, and less than 5% by weight nickel. The steel is treated at about 1050.degree. C. to 1200.degree. C. and then quenched in water.

Product of a high-strength nitrogen containing fully austenitic cobalt

A process of manufacturing a roll suitable for use in a rolling mill, the roll having a cylindrical barrel middle section and a neck at each end of the barrel, wherein the barrel and necks are of different material compositions, by remelting an electrode having a central region corresponding in mass and composition of materials to that desired for the barrel of the roll, two end regions corresponding in mass and composition of materials to that desired for the necks of the roll and a transition region disposed between the central region and each end region, each transition region including the material of the barrel and at least one further material. An electroslag remelting process is used in a water cooled mold. The mold is composed of at least two parts and defines a cavity approximating the final outlines of the roll. The mold has tapered transition regions between a part of the cavity corresponding to the barrel and the constricted cavity regions corresponding to the necks. The roll produced in the remelting step is then heat treated and finished.

Process of producing a composite roll

Growing community of inventors

Essen, Germany

Gerald Stein