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Home Georgian Technologies Nanostructure of Hard Metal Pieces Developed from the Mandrels of Tungsten-Containing Armor-Piercing Shells

Nanostructure of Hard Metal Pieces Developed from the Mandrels of Tungsten-Containing Armor-Piercing Shells

Description

Development the technology for utilizing mandrels of armorpiercing shells and (tungsten, nickel, iron) producing from the extracted elements of hard, wear-resistant work pieces (cutters, dies, nozzles, shafts) competitive in the world market. On the territory of military bases of former SU Republics - in Georgia as well as outside of Georgia there are stores of under-utilization armor-piercing shells.

Contemporary technologies do not provide processes of separating expensive metal components from the mandrels of armor-piercing shells. Therefore a commercial cost of the mandrels is by 8-10 times lower than that of the comprised powder components (W, Ni, Fe) and by 10-20 times lower than that of the articles in the world market.

PST of the Institute of Metallurgy and Materials Science has developed:

  • Environmentally friendly technology for utilizing mandrels of armor-piercing shells with an outcome of commercial product – hard metal pieces. The elements (W, Ni, Fe) comprised in the mandrels are used for preparing chlorides (WCl6 and NiFeCl4) - intermediary links for producing pure as well as hard metals;
  • Innovative technology for manufacturing hard metal pieces. The technology ensures nanostructure of the comprised components. The process is characterized with low power intensity.

The developed technology is universal; its industrial application, as well as technological transfer (via using standard methods of intellectual property sales) is possible.

Innovative Aspect and Main Advantages

“Know-how” of technological process is the stage when are realized the following:
a) obtaining of liquid charge, molecular solution, which components are chlorides (WCl6 and NiFeCl4) obtained a result of utilization;
b) injection of a liquid charge into the reactor at temperature 750-950oC.

Simultaneous processes of reduction and selective carbidization give a powder with each particle comprised of the components of nanocrystalline tungsten carbide (WC) and a binding metal (NiFe). Hard metals made via nanotechnology technique are characterized with homogeneous structure and substantially (by 3 times) increased wear resistance.

The standard pieces of hard metals made of mentioned nano-technology passed testing in different organizations where increase of performance properties by 20-33% was established in comparison with those of the existing samples. Marketing strategy enables efficient use of technological and economic advantages of producing hard metal pieces. In particular, low expenses practically in every point, which provide primary cost of the product. Minimal power expenditure, high output and rapid process as well as high quality if compared to the competitive product, makes possible to provide cost maneuvering within the significant range.

Areas of Application

  • Cutters, bearings;
  • Oil-transfer valves;
  • Water-jet cutting nozzles;
  • High-pressure compressor shafts.

Nanopowders obtained from the utilized mandrels of armor-piercing shells
Fig. 1 Nanopowders obtained from the utilized mandrels of armor-piercing shells

Microstructure and wear resistance of conventional and nano-sized hard alloys
Fig. 2 Microstructure and wear resistance of conventional and nano-sized hard alloys

Stage of Development

The technology has been tested by laboratory tests.

Contact Details

F.Tavadze Institute of Metallurgy and Materials Science
15, Al Kazbegi, 0160 Tbilisi, Georgia
Contact person: Archil Gachechiladze
Tel.: (+ 995 32) 37 0285
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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