Vereinigte Edelstahlwerke Aktiengesellschaft (Vew)

Bohler Edelstahl Gmbh

Boehler Ges M.b.h.

Heimo Jager

Peter Machner

Manfred Gfrerer

Erwin Plockinger

Gert Kuhnelt

Herbert Puschnik

Albert Preiner

Hellmut Fischmeister

Franz Jeglitsch

Sadi Karagoz

Claus-Dieter Locker

Franz Matzer

Johann Stamberger

Helmut Glauninger

Elfriede Kudielka

Josef Puber

Bruno Hribernik

Friedrich Koch

The invention is directed to a Titanium-aluminum base alloy articles are produced from pieces of starting materials by melting thereof in a metallic melting crucible having a rotating electrode or a plasma- or electron beam device and there is then accomplished arc remelting, preferably vacuum-arc remelting following the melting of the pieces of starting materials. Furthermore, the arrangement for the manufacture of the articles formed of titanium-aluminum base alloys comprises a melting apparatus containing a rotating electrode or a plasma- or electron beam device and a vacuum-arc melting apparatus.

Method of manufacturing titanium-aluminum base alloys

The invention relates to high speed tool steels produced by powder metallurgy; to parts subject to heavy wear which are fabricated from such steel; and to a method of such fabrication. According to the invention, the part subject to heavy wear contains Nb in the amount of 2-15 wt. % and V in the amount of 1-4 wt. %, and further contains metal carbides in the amount of 10-30 vol. %; and that the lower limit of the carbon content is given by the formula

High speed tool steel produced by powder metallurgy

A method of regulating the melting rate of a self-consumable electrode during electroslag remelting in a slag bath, wherein the lowering speed of the electrode which is to be remelted, the length of which is determined, is regulated in consideration of maintaining a set or reference value of the melting rate and the current intensity and/or the potential. There is continuously determined the weight of the part of the electrode immersing into the slag bath from the actual total electrode weight and the length of the electrode above the surface of the slag bath and such is compared with a set or reference value and altered when there is present a deviation of the quotient U.sub.Ref and J.sub.Ref, wherein the former represents the reference potential or voltage and the latter the reference current, and the product remains constant. The actual melting rate is compared with a set or reference melting rate and when there is present a deviation there is correspondingly altered the product of J.sub.Ref and U.sub.Ref.

Method and apparatus for regulating the melting rate of an electrode

An electroslag remelting furnace includes a liquid-cooled, open-ended mold supported by a bottom plate of high electric conductivity, for instance, formed of copper, which closes the mold at one of its ends. The mold has a plane of symmetry which contains a mold axis. At least one conductor connects at least one terminal located at the bottom plate to a source of electric current. Furthermore, the mold has a normal plane extending normally with respect to the symmetry plane which contains the mold axis. The electric conductor extends from a marginal zone on one side of the bottom plate to the terminal on the other side of the bottom plate beyond the normal plane.

Apparatus for the electroslag remelting of alloys, especially steel

In a method of producing ingots of unalloyed and alloyed steels having an improved primary crystallization, reduced ingot segregation and a reduced content of non-metallic inclusions, liquid steel is poured into a mould in an amount substantially approximately equal to the desired weight of the ingot to be obtained, slag is applied to the steel and energy is supplied to the already melted slag to maintain the liquid core zone of the slag at a high temperature, while the walls laterally confining the slag are cooled to create and maintain a layer of solid slag in that area, the energy supply to the slag is effected by resistance heating by means of at least one consumable electrode having a chemical composition identical or similar to that of the ingot, and the quantitative composition of the at least one consumable electrode is selected in a manner as to obtain a concentration of segregating elements in the amount of steel melted off per time unit that is lower by that amount in which the concentration of segregating elements increases per time unit in the remaining melt of the ingot.

Method of producing steel ingots

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Bruck an der Mur, Austria

Heimo Jager