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Home Georgian Technologies Development of a New Nanotechnology for Obtaining High Strength Steel

Development of a New Nanotechnology for Obtaining High Strength Steel


A disperse solidified with nano-dimension particles, steel of antiballistic designation has been processed, whose level of defense properties is conformable with modern standards, as armor.

There was developed plastic deformation process of hardly-deformed alloy by using in essence new electrorolling technology and device existing in the Institute which provides electrocontact heating and forming in simultaneous regimes. In the deformation zone metal was quickly heated by current (Fig. 1).

There is obtained a surface layer of high hardness with the following characteristics:

  • Thickness of armor plates H 3-4.3 mm
  • Density δ ∼ 7.8 g/sm3
  • Hardness of frontal layer 60-63 HRC
  • Hardness of inner layers 45-50 HRC
  • Strength σB ∼1600-2000 MPa.

Innovative Aspect and Main Advantages

To achieve the task there was used:

  1. Original methodology of rolling which makes possible to obtain heterogenic armor by passing electric current through the deformation zone.
  2. Significant conditioning of armor steel with ceramic-metal nano particles.
  3. Original methodology of microalloying and modification of the processed steel.

In the conditions of physical-mechanical properties (strength, hardness, impact strength, etc.) armor steel will have higher economic efficiancy by 10-15% as compared to its prototype.

Areas of Application

Armor steel can be used for making following security constructions:

  1. Protecting engineering constructions for banks and other commercial structures:
    • Armor constructions for material assets transporting cars;
    • For exchange office.
  2. Armor constructions:
    • Armor vest hard inserts;
    • Assault shield for special destination groups, etc.;
    • Armor constructions for armored vehicles and helicopters.

Fig. 1 a) temperature profile (back side of armor plate );
b) electric rolling scheme;
c) temperature profile (frontal side of armor plate).

Stage of Development

The technology was tested by laboratory tests.

Contact Details

F.Tavadze Institute of Metallurgy and Materials Science
15, Al Kazbegi 0160 Tbilisi, Georgia
Contact person: Otari Okrostsvaridze
Tel.: (+ 995 32) 37 1448
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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