INSTITUTE OF PULSE PROCESSES AND TECHNOLOGIES
NATIONAL ACADEMY OF SCIENCES OF UKRAINE

Technology of electrohydoimpulse melt treatment in the ladle at precasting stage

+ This technology provides

  Melt outgassing and removal of nonmetallic inclusions
  Increase of melt fluidity and moulds fillability.
  Defects of gasshrink origin elimination.
  Receipt of favorable structure in a cast metal, influencing its structural levels, from corpuscular to macro.
  Positive influence on cast metal properties.

- Essency

Pressure pulses of a high frequency spectrum (0,1 – 100000 Hz) are sent to the ladle with the melt by means of a special waveguide from the electric-discharge generator of elastic vibrations. This essentially accelerates heat-, mass-transfer, and physicochemical processes at the macro- and micro- levels.

+ Advantages

• environmental safety in combination with successful treatment;
• very low electric energy consumption in comparison with other methods of out-of-furnace treatment: <2 kW·h/t;
• short-time processing: <5 minutes;
• ease of service and high reliability of used high-voltage equipment;
• possibility of both independent use of the method and of its interconnecting with the other technological techniques of out-of-furnace treatment.

+ Efficiency

• free hydrogen removal, not less than 30 %;
• reduction of quantity of nonmetallic inclusions, on 15 %;
• decomposition of macro- and microstructure;
• decrease of cold brittleness threshold on 20°С; decrease of spread in values of mechanical data, not less than 15 % (mouldings of shipbuilding and general-purpose steels);
• increase of wear-resistance, not less than 50 % (mouldings of high-carbon alloys, working in conditions of hydroabrasive wear);
• decrease of magnetic conductivity in high-carbon alloys for electrotechnical purposes on 4-10 % ;
• impermeability increase of irregular-shape castings of aluminum alloys, working in conditions of high pressures on 10%; decrease of adverse effect of iron admixtures and structural heredity at remelting of secondary aluminum alloys.

- Manufacturing application

At shipbuilding and machine-building enterprises of Ukraine and Commonwealth of Independent States for melt treatment in the ladles with capacity up to 50t. Equipment development for 350t. of ladles was carried out.

Phone: (0512) 58-71-40, (0512) 58-71-42