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   Electroslag Remelting Furnaces

Electroslag Remelting Furnaces


Technological criteria:


 Weight of ingots, t. 0.125 - 40.0
 Supply power, kVA. 250 - 7200
 Cross-section dimension, mm. Æ 250 - 1500
 485 - 650
600x1100 - 1000x2000

 

     Electroslag remelting (ESR) furnaces are intended for production of high-quality steel ingots of round, square and rectangular cross-sections and also of hollow billets and shaped castings. The ESR process is performed by remelting of cast, forged or rolled consumable electrodes under the layer of slag, heated to 1700-2000°C by the electric current passing through it.
     Ingots formed in the course of ESR process due to the directed upward solidification in water-cooled molds, treatment by chemically active slags and forming within a slag scull are featured by the essential homogeneity of structure, high density, low content of non-metallic inclusions and harmful admixtures, also by a smooth surface not demanding any machining.
     Excellent service characteristics of the ESR metal competitive in the cast state with those of the deformed metal provide an essential increase in the service life and reliability of heavy-duty items beginning from tiny instrument bearings to multi-ton rotors of powerful generators.
     ESR furnaces are equipped with transformers with a large number of secondary voltage steps and computer base control systems, providing a programmable regulation of the ESR process in accordance with preset technological parameters.
     Electroslag crucible furnaces are intended for production of high-quality castings approaching in their shape the final items from scrap of alloy steel and non-ferrous metals.
     The remelting of consumable electrodes formed of scrap fragments by welding is performed under the layer of slag in the crucible with a refractory lining. The produced metal melt is poured after the end of remelting from the crucible into metal molds of needed profile. It is possible also to remelt metal chips in the crucible, using non- consumable graphite electrodes.


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