Electroslag technology (EST)

Electroslag remelting (ESR) and electroslag chill casting.

Two EST processes of smelting pieces of forging dies from waste alloy steel operate at the plant.

One of the implemented processes of EST is the technology of electroslag remelting (ESR). Electroslag remelting provides consumable electrode melting in water-cooled mold.
Process (ESR). A consumable electrode submerged in the slag bath, is melted by the heat generated in the slag during the passage of electric current through a slag. Molten metal from electrode in the form of drops is let down through the slag into the metal bath, which hardens to form a mold.
The factory process (ESR) is represented by two electroslag furnaces - the maximum volume of melted mold 2.5 and 0.7 tons.
Furnaces (ESR) operated on smelting pieces of forging dies from used stamps.
Method (ESR) allows to receive high-quality blanks with fine-grained structure and minimum contamination of non-metallic inclusions.


The second process of EST Ц electroslag chill casting..
Electroslag chill casting is a two-step process: first is getting of liquid metal electroslag from electroslag crucible furnace and then pour it into a metal mold together with the slag used in smelting.
Electroslag chill casting process allows to produce the quality steel products (billets stamps) from wastes:
- from briquette chips;
- directly from scrap.
Electroslag chill casting process at the plant is represented by two electroslag crucible furnaces: the maximum volume of smelting steel 200 and 300 kg..

The surface of castings is smooth. Machining allowances do not exceed 5-6 mm on a side. Valid metal output is over 94%.