melt degassing and removal of nonmetallic inclusions;
increase of melt fluidity and filling capacity of molds;
gas-shrinkage defects elimination;
obtaining a favorable structure in a cast metal by impacting on its structural levels from atomic to a macrolevel;
positive influence on cast metal properties.
Pressure pulses of a wide frequency range (0.1 - 100,000 Hz) are supplied to the ladle with the melt by a special-purpose waveguide from the electrodischarge generator of elastic oscillations. This essentially accelerates heat-, mass-transfer, and physicochemical processes at the macro- and micro- levels rendering favorable conditions for its efficient crystallization.
environmental safety combined with successful treatment;
very low electric energy consumption compared to other methods of ladle treatment: < 2 kW·h/t;
short-time treatment: < 5 min;
easy maintenance and high reliability of used high-voltage equipment;
possibility of both independent and combined use of the method together with other technological techniques of ladle treatment (modifying, alloying, blowing, magnetohydrodynamical, etc.).
increasing the melt fluidity;
free hydrogen removal, not less than 30 %;
reduction of quantity of nonmetallic inclusions, by 15 %;
refining of a macro- and microstructure;
decrease of cold brittleness threshold by 20°С;
decrease of spread of values of mechanical characteristics, not less than 15 % (castings from shipbuilding and general-purpose steels);
increase of wear-resistance, not less than 50 % (castings from high-carbon alloys operated in conditions of hydroabrasive wear);
decrease of magnetic conductivity in high-carbon alloys for electrotechnical purposes by 4-10 % ;
increasing the air-tightness of irregular-shape castings from aluminum alloys operated in conditions of high pressures by 10%;
decreasing a harmful effect of iron admixtures and structural heredity during remelting of secondary aluminum alloys.
At shipbuilding and machine-building enterprises of Ukraine and the CIS for melt treatment in ladles with capacity up to 50 t. Equipment for 350 t ladles is developed.
Go to Next Page to read more about the technology of electrohydropulse treatment of liquid and crystallizing metals and alloys at a pre-pouring stage, and also about the Department developing this technology.
Справки по тел.: +38 (0512) 58-71-40, +38 (0512) 58-71-42