Skw Trostberg Aktiengesellschaft

Metallgesellschaft Aktiengesellschaft

Halbergerhutte Gmbh

Halbergerhuette Gmbh

Friedrich Wolfsgruber

Detlef Missol

Karl J Reifferscheid

Ernst A Weiser

Werner Gmohling

Helmut Lischka

Hartmut Meyer-Grunow

Heinz Bruckmann

Manfred H Odendahl

Hans W Kasel

Julius Veit

Wolfram W Morsdorf

Ernst J Doliwa

Jochem Richter

Wolfgang Geiger

Hans Kern

The invention concerns a cored wire comprising a metal tube and a filling of magnesium or other pyrophoric metals passivated with from 0.5 to 5% by weight of organic nitrogen compounds. As the passivating agent, compounds from the series of the s-triazine and/or guanidine derivatives, preferably from 2 to 5% by weight of dicyandiamide, applied by means of an adhesion promoter, are preferred. The wires used in accordance with the invention serve to produce cast iron with spheroidal and vermicular graphite, to desulphurize pig iron melts or to produce metal alloys.

Cored wire with a content of passivated pyrophoric metal, and the use

The present invention provides an agent for the desulphurization, magnesium treatment and inoculation of cast iron melts in a single step based on a silicon alloy, wherein the agent has the following composition:

Agent for the treatment of cast iron melts, process for the production

The present invention provides an agent for the introduction of nitrogen into cast iron, wherein it contains or consists of at least 50% by weight of at least one nitrogen-containing compound with an N--C--N structure and/or a mixture of calcium cyanamide with nitrides of silicon, ferrosilicon, manganese and chromium. The present invention also provides a process for the introduction of nitrogen into cast iron using this agent.

Process for the introduction of nitrogen into cast iron

An inoculant alloy based on ferrosilicon or silicon for the manufacture of cast iron with lamellar, compact or spheroidal graphite is described, this alloy comprising

Inoculant alloy based on ferrosilicon or silicon and process for its

The present invention provides a treatment agent for cast iron melts based upon ferrosilicon magnesium with a silicon content of from 40 to 80% by weight and a magnesium content of from 0.5 to 15% by weight, said agent being in the form of granules with a specific surface area of from 0.2 to 0.8 m.sup.2 /g. according to BET. The present invention also provides a process for the production of this treatment agent, wherein a jet of molten ferrosilicon magnesium alloy is directed on to a bounce plate made of fire-resistant material and the melt droplets which bounce back from bounce plate are allowed to solidify in a liquid-filled collection receiver.

Treatment agent for cast iron melts and a process for the production

It is known to contact molten cast iron with various treating agents in the casting mold in order to influence the base structure or the form of the graphite. Such casting molds for making castings of cast iron containing vermicular and/or spheroidal graphite are provided with an intermediate chamber, which is provided in the pouring system between the pouring gate and the ingate to the casting mold proper. That intermediate chamber serves to receive the graphitizing agent and to contact it with the molten cast iron. To permit a functional adaptation of the chamber surface area or the surface area of the treating agent contained in the chamber to the pouring gate, which changes as the pouring proceeds, the casting mold is provided with a frustopyramidal intermediate chamber which has a rectangular base disposed in the parting plane of the mold.

Apparatus for treating molten cast iron

A slow fade cast iron inocculant is made up of

Growing community of inventors

Tacherting, Germany

Friedrich Wolfsgruber