The Powers of Non-Governmental Agencies in the Fight Against Corruption at the Regional Level

The article is devoted to the problems of combating corruption through the influence of public structures and public opinion, in particular their influence on the adoption of normative legal acts by the government authorities in the region

Investigations of Nanocrystalline Alloy Electrospark Coating Made of Nanocrystalline Alloy Based on 5CP Ferrum

© Published under licence by IOP Publishing Ltd. The article describes the properties of wear resistant electrospark coating made of nanocrystalline alloy of type 5CP (Finemet). It is proved that electrospark coating has nanocrystalline structure which is like amorphous matrix with nanocrystals α - Fe. Coating thickness is 33 μm, micro-hardness is 8461 - 11357 MPa, wear resistance is 0,55×10 4 s/g. Coating ofnanocrystalline alloy of type 5CP can be used to increase wear resistance of machinery working surfaces

Increase of the resource of machine parts working by combined methods using plasma electrolytic oxidation

© 2018 Institute of Physics Publishing. All rights reserved. The paper presents the results of a study of the physicomechanical properties of oxide-ceramic coatings formed by plasma electrolytic oxidation on various aluminum alloys. It has been found that filling the pores of an oxide-ceramic coating with oil or applying a copper layer to its surface with a friction-mechanical method increases the wear resistance of movable joints of machine parts by 1.7 times and 4.5 times, respectively. Based on the complex of studies carried out, combined methods are proposed that significantly increase the life of reinforced parts of machines in operation

Investigation of nanometallokeramic composite coatings obtained by vibro-arc surfacing

© Published under licence by IOP Publishing Ltd. The paper presents a description of the method of hardening the working bodies of agricultural machines, working in conditions of abrasive wear. The method includes vibro-arc surfacing of nanometallokeramic composite powder materials with simultaneous thermal diffusion hardening. The optimal composition and concentration of components of the material, ensuring the best physical and mechanical properties and resources of the hardened working bodies tillage machines

Investigation of plasma metal-ceramic coatings on cutting surfaces of working bodies of machines and mechanisms

© Published under licence by IOP Publishing Ltd. The article describes the innovative method of strengthening the working organs of soil-cultivating machinery, which are operated in an abrasive medium.It is performed by carbo-vibro-arc surfacing of working bodies using composite metal ceramic pastes with simultaneous thermodiffusion hardening of basic metal of the working body. Based on the results of the studies, the optimum composition and concentration of pasta components were determined, which ensure an increase in wear resistance of hardened working organs by an average of 1.8 ... 2.0 times

Application of nanostructured coatings by plasma spraying

© 2018 Institute of Physics Publishing. All rights reserved. Nanostructured coatings demonstrate lower porousness by an order of magnitude, a far higher tenacity to wear, corrosion and erosion. The article presents the investigations of new method of nanostructured coatings application consisting in plasma spraying of material supplied into plasma jet and nanoparticles in suspension or solution followed by coating surface melting by air plasma jet

Aerosol fluxing in electro arc metallization

© Published under licence by IOP Publishing Ltd. The main structural and technological factors of electric arc metallizers, which significantly affect the quality of their operation, are considered. The results of experimental studies on the adhesion strength, porosity, microhardness and comparative wear resistance of coatings obtained by electroarc metallization are presented. Optimal modes of coating with electroarc metallization are determined. It is established that the use of aerosol fluxing during electric arc metallization provides an increase in adhesion-cohesive strength by 25 ⋯ 30%, an increase in microhardness to 40%, a decrease in porosity by 20 ⋯ 25%

Fuel system for diesel engine with multi-stage heated

© Published under licence by IOP Publishing Ltd. The article describes a fuel system of a diesel engine with a construction tractor multistage heating, allowing the use of pure rapeseed oil as a diesel engine fuel. The paper identified the kinematic viscosity depending on the temperature and composition of the mixed fuel, supplemented by the existing recommendations on the use of mixed fuels based on vegetable oils and developed the device allowing use as fuel for diesel engines of biofuels based on vegetable oils

Investigation of Properties of Electro-metallized Coatings Deposited by Supersonic Air Stream with Aerosol Fluxing

© 2019 IOP Publishing Ltd. All rights reserved. The article presents the results of studies of the effect of flux components on the adhesive strength, porosity and oil absorption of coatings obtained by supersonic arc metallization (EM) using aerosol fluxing (AF) deposited on 45G2 steel with a speed v = 400-410 m/s. Due to the use of AF in EM, the adhesion strength of electrometallization coatings (EM coatings) increases. The highest value of adhesive strength is 66 MPa. Porosity due to the use of AF decreases by 1.5-1.6 times, in comparison with EM coatings without AF. At the same time, the oil absorption of EM coatings using AF decreases 1.6-1.7 times. It is advisable to use EM coatings with AF when restoring worn-out parts for various purpose equipment, as well as for eliminating defects at the production stage

Investigation of Properties of Electro-metallized Coatings Deposited by Supersonic Air Stream with Aerosol Fluxing

© 2019 IOP Publishing Ltd. All rights reserved. The article presents the results of studies of the effect of flux components on the adhesive strength, porosity and oil absorption of coatings obtained by supersonic arc metallization (EM) using aerosol fluxing (AF) deposited on 45G2 steel with a speed v = 400-410 m/s. Due to the use of AF in EM, the adhesion strength of electrometallization coatings (EM coatings) increases. The highest value of adhesive strength is 66 MPa. Porosity due to the use of AF decreases by 1.5-1.6 times, in comparison with EM coatings without AF. At the same time, the oil absorption of EM coatings using AF decreases 1.6-1.7 times. It is advisable to use EM coatings with AF when restoring worn-out parts for various purpose equipment, as well as for eliminating defects at the production stage