THE CALCULATION OF THE DEPTH OF NITROGEN ION MODIFIED LAYER IN 06Х19Н9Т STEEL WITH REGARD TO PINHOLES GENERATED DURING ION NITRIDING

GRIGORCHIK Aleksandr N., Post-Graduate Student, Junior Researcher of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The article suggests a model that allows to make theoretical evaluation of the depth of the modified layer of austenitic 06Х19Н9Т steel after ion beam nitriding. The number of pinholes generated during the processing and the time of saturation have been selected as parameters exerting a major influence on the depth of penetration of nitrogen into steel during ion beam processing. The article presents model calculations of the depth of modified layer for different temperature ion-beam nitriding of austenitic 06Х19Н9Т steel.

ion-beam nitriding, austenitic steel, the concentration of point defects, diffusion, layer depth, the concentration of nitrogen

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SPECIAL ASPECTS OF DIFFUSIONAL TRANSFER OF THE ALLOYING ADMIXTURE DURING ION NITRIDING OF THE THERMAL-SPRAYED COATINGS

GRIGORCHIK Aleksandr N., Post-Graduate Student, Junior Researcher of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output

KUKAREKO Vladimir A., Dr. Phys.-Math. Sc., Associate Professor, Head of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BYELI Aleksey V., Dr. Techn. Sc., Professor, Associate Director, Physicotechnical Institute of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus

BELOTSERKOVSKIY Marat A., Dr. Techn. Sc., Associate Professor, Head of the Laboratory of Thermal Spray Methods of Machines units Managment, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus

The effect of ion-beam nitriding of 09X19H9T austenitic high velocity oxygen fuel coating on phase composition and structure of nitrided layer has been investigated. The distribution of nitrogen atoms in near-surface layer has been studied. It is established that deposited particles with relatively low depth of oxide streaks have higher concentration of alloying element and microhardness. The model connecting inhomogeneous distribution of alloying element in deposited particles with diffusion impermeability of oxide streaks located on the boundaries of the deposited particles has been suggested.

thermal coating, ion-beam nitriding, oxide streaks, concentration discontinuity

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SYNTHESIS OF CARBIDE-CORUND FILLER AND ITS IMPACT ON THE STRUCTURE AND PROPERTIES OF PISTON GK-AlSi12(Cu) ALLOYS

KOMAROV Aleksandr I., Сand. Techn. Sc., Head of the Sector of Metallurgy and Magnetic Structurescopy of Steel and Alloys, Joint Institute of Mechanical Engineering of the National Academy of Sciences, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KOMAROVA Valentina I., Сand. Phys.-Math. Sc., Associate Professor, Leading Researcher of the Laboratory of Metallurgy in Mechanical Engineering, Joint Institute of Mechanical Engineering of the National Academy of Sciences, Minsk, The Republic of Belarus

ORDA Dmitriy V., Junior Researcher of the Laboratory of Metallurgy in Engineering, Joint Institute of Mechanical Engineering of the National Academy of Sciences, Minsk, The Republic of Belarus

The synthesis of carbide-corundum filler based on titanium oxide by the method of chemical vapor deposition in a reducing atmosphere of ammonia and hydrogen has been investigated. The data analysis shows that the synthesized filler includes nanoscale high-melting compounds — carbide titanium and corundum. It is shown that the introduction of 1 wt.% of this nanofiller is accompanied by the dispersion of the structural components of the alloy not less than 2 times, it provides the microhardness increase of the α-phase by 1,5 times and eutectic by 2 times, the coefficient of friction decrease by 4–8 times, multiple increase of wear resistance of the composites obtained, due to the lack of wear of samples of castings for the entire test cycle of the obtained composites, whereas wear rate of the sample from GK-AlSi12(Cu) alloy at a load of 20 MPa was ~36 mg/m.

nanosized refractory filler, ceramic nanoparticles, structure, aluminum alloy, micro-hardness, friction coefficient, wear resistance

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MODIFIED IN VOLUME WITH TITANIUM CARBIDE OXIDE-CERAMIC COATING ON THE EUTECTIC SILUMIN: PREPARATION, STRUCTURAL-PHASE STATE, PROPERTIES

KOMAROV Alexandr I., Cand. Techn. Sc., Head of the Sector of the Laboratory of Metallurgy in Mechanical Engineering, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The article presents the results of volumetric modification with synthesized nanoscale titanium carbide of the ceramic coatings obtained on eutectic silumin in the process of micro-arc oxidation. A significant effect of TiC, injected at various concentrations into the electrolyte to the structure and tribomechanical properties of the coatings has been found. This is primarily expressed in the increased (at least 3 times) content of corundum in the coating, which leads to an increase in wear resistance of 2-fold while the coefficient of friction decreased by 1,3 times.

carbide corundum composition, oxide-ceramic coating, microarc oxidation

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