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Institut Elektrosvarki Imeni E.o. Patona Akademii Nauk Ukrainskoi Ssr

Alfred Iosifovich Bukalo

Boris E Paton

Gary A Melnik

Jury V Latash

Victor Iosifovich Lakomsky

Anatoli Ivanovich Chvertko

Viktor Iosifovich Lakomsky

Gennady Fedorovich Torkhov

Konstantin S Tolstopyatov

Igor S Pryanishnikov

Jury Vladimirovich Lisovoi

Sergei Panteleevich Bakumenko

Oleg S Zabarilo

By Tatyana Topilina, Administrator

Anatoly R Slobodian

By Tatyana Kuznetsova, Administrator

Vladimir V Goncharenko

Mikhail K Zakamarkin

Valentin Petrovich Domrachev

Stanislav S Ivanchenko

Nikolai V Reida

Vladimir K Kedrin

Mikhail M Kljuev

Jury I Modelkin

Boris P Sokolkin

Lev R Tager

Valentin V Topilin, Deceased

By Alevtina Guschina, Administrator

Anatoly A Zhdanovsky

Vitaly Mikhailovich Shian

Nikolai I Zamulo

Sergei G Guschin, Deceased

Vladimir Nikolaevich Kostyakov

By Ljudmila Korobkova, Administrator

Alexei K Andrianov

The method consists in that a flat work in an initial position is oriented horizontally between cooled mold beams. Plasma torches are arranged in line across the parallel side edges so that the anode spots of the extreme torches are confined by said edges of the work. By supplying a plasma forming gas and electric current to the plasma torches the work is heated with the formation of a metal pool which extends across the work from edge to edge. By relatively moving the work and the plasma torches in a horizontal plane and along the edges of the work movement of the metal pool over the surface thereof is effected and thereby a remelted layer as thick as the pool is deep, is obtained. The apparatus for carrying out the method comprises a sealed chamber containing a mold having two beams arranged in a horizontal plane and being parallel to one another. Installed in the chamber are plasma torches mounted on shafts and connected through supply lines with the sources of plasma forming gas, electric current and cooling water. Each of the shafts is journalled in a sealing bush installed in the wall of the sealed chamber so that the axis of the shaft is parallel to the beams. Each shaft is rotatively driven by a drive. The apparatus further comprises a drive for relatively moving the work and the shafts in the plane parallel to the beams, connected with at least one of the elements taking part in such movement. The practice of the method with the help of the apparatus of the invention permits a high-quality work of a predetermined macrostructure of a surface layer, to be produced at a higher rate of treatment.

Method of the plasma jet remelting of a surface layer of a flat metal

A plasma-arc furnace comprises a casing with plasma torches, particularly ree torches, mounted therewithin in symmetrical relationship relative to the vertical axis thereof. Each of these torches comprises a body provided with a nozzle and an axial conduit for feeding a plasma-forming gas therethrough, and a cylindrical electrode disposed within said conduit. According to the invention, the distance between the centers of working ends of electrodes disposed within adjacent plasma torches is not more than 15 diameters of the electrode.

Plasma-arc furnace

A plasma arc remelting furnace system with improved components including mechanisms for independently vertically feeding and oscillating the metal blank through the top of the furnace. Multiple plasma arc torches (plasmatrons) are installed in a sealed chamber and adjustable operators enable angular disposition of individual torches. The torches have improved torch nozzles with heat sink construction enabling operation at higher temperatures, better stabilized plasma arcs and longer torch life. The system can utilize ingot molds of various cross-section shapes, i.e., round, square, rectangular and polygonal and, depending upon mold shape, the number of torches can differ. Operating circuits are provided for use with a plurality of different numbers (up to eight) of torches, either with direct current or alternating current power sources, and possible variations of circuits will enable using a large number of torches.

Furnace construction for plasma arc remelting of metal

Nonconsumable electrode for melting metals and alloys, comprising a housing with a hollow fluid-cooled tip. On one of the tip's side-walls, on the side of the cavity, there is at least one threaded groove. This side wall with the threaded groove on it serves as a means for the rotation of the arc which is actuated between the tip and a metal or alloy to be melted.

Nonconsumable electrode for melting metals and alloys

A plasma arc remelting furnace system with improved components including mechanisms for independently vertically feeding and oscillating the metal blank through the top of the furnace. Multiple plasma arc torches (plasmatrons) are installed in a sealed chamber and adjustable operators enable angular disposition of individual torches. The torches have improved torch nozzles with heat sink construction enabling operation at higher temperatures, better stablized plasma arcs and longer torch life. The system can utilize ingot molds of various cross section shapes, i.e., round, square, rectangular and polygonal and, depending upon mold shape, the number of torches can differ. Operating circuits are provided for use with a plurality of different numbers (up to eight) of torches, either with direct current or alternating current power sources, and possible variations of circuits will enable using a larger number of torches.

Method of arc control in plasma arc furnace torches

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Kyiv, Ukraine

Alfred Iosifovich Bukalo