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Russian version

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DEPOSITION OF WEAR-RESISTANT FILM

COATINGS ON TOOLS

(Based on patent of Russia # 2023027) - 39Kb (*.jpg)

Brief Description and Specific Features

The process involves the boiling of tools in an specially prepared aqueous suspension of compounds and other ingredients (the composition of the media and the treatment regime constitute the "know-how"). The ingredients are cheap and ecologically safe, and the suspension allows for multiple usage. For tools experiencing impact loads and/or local heating of the cutting edge during the service, subsequent heat treatment (tempering) is required. The treatment results in the formation of a soft film coating on the surface of the items, its thickness is about 10 mm. The coating acts as a solid lubricant during the work and is most effective for tools not subjected to heating and impact loading. refractory

Advantages Over Known Coatings and Coating Deposition Methods

• the process is simple and ecologically safe, gives stable results, does not require expensive equipment and materials and high-skilled personnel, can easily be controlled and automatized
• the technology is energy-efficient: unlike electroplating, electric current is not fed to the articles
• it permits to obtain coatings of a uniform thickness free of defects common in coatings deposited by electroplating and other methods (spallation, swelling, etc.)
• in tool making, the process is a final operation;
• it can also be applied to purchased tools u it can be applied to resharpened tools
• the technology is more cheap. For example, 1 kg of the powder mixture (the cost is $3-5) permits to process 30-40 kg of tools, parts (the cost of hard alloy tools is $4000-10000, the cost of HSS tools is $400-1000) increasing the wear resistance by the factor of not less than 2.

Results of Testing in Industry

The use of coatings produced by the developed process gives an opportunity to increase the service life of high-speed and hard-alloy cutting tools and stamps by the factor of 1.5-4.

Examples: the increase of service life of processed tools, times: ·

Drills purchased from the German company "Stock" were processed by the developed technology. Testing revealed an increase in the service life by the factor of 1.8. Industrial testings of this process on "Daewoo Motor Poland" and Slovak companies "Skloplast", "ZVL-LSA Skalica", "Povazska strojarne" have shown an increase in the service life of screw taps, knives, punches and drills by the factor of 2 to 3.

When used for stamps and dies, the coatings permit eliminating adhesion.

The process is easy to implement. It has been tested and is used by more than 10 enterprises in Belarus and Russia.

Possible Ways of Cooperation

1. The process is available "as is". The powder mixture used for the preparation of the suspension can be produced by the author and shipped to the customer.
2. To improve the visual appearance of the coatings (color, color uniformity, etc.) and to use cheaper ingredients, additional investments are required for carrying out joint researches with a foreign partner. Besides, the process can be modified to develop novel decorative film coatings.

For more information please contact the author:

Dr Alexander Shmatov
Belarussia State Polytechnic Academy
65 F.Skorina Ave., built. 7
Minsk 220027
Belarus
Phone: (375) 17 2581066 (home), 2399260 (office)
Fax: (275) 17 2329137
E-mail: shmatov@infra.belpak.minsk.by

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