Ìåæäóíàðîäíûé íàó÷íûé æóðíàë
Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî ÍÀÍ Áåëàðóñè, Ãîìåëü, Áåëàðóñü
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ÒÐÅÍÈÅ È ÈÇÍÎÑ Ìåæäóíàðîäíûé íàó÷íûé æóðíàë Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî ÍÀÍ Áåëàðóñè, Ãîìåëü, Áåëàðóñü |
Summary: The article deals with the search for additional criteria (generalized factors) of wear of industrial ceramics.
Zharov I.A.
An elastoplastic model of friction and wear of steel bodies in rolling with slip. pp. 16--21
Summary: An elastoplastic model of friction and wear in rolling with slip is proposed. It is pointed out that the model has relation with the preceding models and trends of its development are shown.
Sergeichev A.V., Denisova N.E.
Running-in of intricate engineering sytems from the viewpoint of reliability and wear. pp. 22--28
Summary: The running-in is treated from the viewpoint of reliability and wear. The conditions of liquid friction and the minimal thickness of a lubricating layer are corroborated. The results of statistical studies from the viewpoint of reliability have yielded the running-in time in the graphic and analytical forms.
Rzaev T.G., Nagiev A.G., Sadykhov V.V.
A tribological assessment of nominal dynamic conditions of operation of controllable mechanisms with a variable-speed gear. pp. 29--34
Summary: A new function is introduced that characterizes the spectral distribution of the wear rate of friction surfaces relating to the frequency properties of governing effects that arc induced when the gear ratio of the variable-speed gear is changed under nominal conditions of operation of mechanisms. A specific model of the mechanical system with a variable-speed gear serves to show the effectiveness of using this function as tribological criteria of optimization.
Bogdanovich P.N., Danchenko S.G.
Features of wear of metal-polymer friction pairs operating with pre-displacement. pp. 35--40
Summary: Regularities of wear of composites based on heat curing and reactive plastics are discussed when these composites are used to produce coatings or parts of friction units operating with pre-displacement. It is shown that the mechanisms of wear and failure of various portions of the friction surface are different and governed by the nature of a polymeric material and the rate of tangent loading. When the sliding speed is slow the extreme turning points undergo the maximum wear, when the speed is high the median portions of the friction track undergo the maximum wear.
Barsukov V.G., Krupich B., Sviridenok A.I.
Features of impact interactions beween solid particles and fan vanes. pp. 41--47
Summary: It has been studied that the dynamic contact between solid particles and the fan vane takes place in the form of two consecutive elastoplastic impacts, the first being direct and the second inclined so that particles slide over the surface.
Tsvetkov Yu.N., Tretyakov D. V.
Plasticity of the low-carbon steel during cavitation. pp. 48--56
Summary: The response of steel 05kn to variations of the rate of cavitation effect has been studied during tests with a magnetostrictive vibrator (MSV). It is shown that the metal's plasticity drops non-monotonously as the amplitude of vibrations of the tip of the MSV concentrator increases. When the amplitude becomes critical corresponding to the change of the curve of durability of surface layers in cavitation a "step" appears in the relation between the plasticity and the amplitude of vibrations due to an abrupt change in the rigidity of the stress-strain state of the surface. Examination of debris distribution does not confirm the assumption that the change in the scale level of deformation can be a possible cause of any abrupt change in plasticity. Probable causes why the material responds differently to various intensities of cavitation are analyzed.
Romanov R.I., Fominsky V.Yu., Baskakov D.E., Matsnev N.P., Sharf V.
Triboengineering properties of nanocomposite W-SE-C-coatings on steel during tests in the air. pp. 57--62
Summary: The triboengineering characteristics of W-Se-C-coatings have been studied after co-precipitation by the pulsing laser from a mosaic target assembled with WSe2 and graphite plates. The obtained coatings were investigated with the methods of inverse Rutherford scattering of ions, X-ray photoelectron and micro-Raman spectroscopy and transmission electron microscopy. It is established that atoms of W and Se in coatings with the composition WSe1,7C7 form chemical bonds typical for WSe2. Inclusions of tungsten diselenide of nanometric dimensions are implanted into the carbon matrix, its structural composition being dependent on the temperature conditions of sputtering of coatings. When the sputtering is performed at room temperature the diamond-like interatomic bonds prevail in the carbon matrix; when it is performed at 150 °C the graphite-like bonds prevail. The friction coefficient of the diamond-like coating in the air is < 0.16; it withstands > 3• 104 friction cycles. The coatings with the graphite-like matrix withstands <2.5• 103 cycles and its friction coefficient is »0.24.
Pamfilov E.A. and Pyrikov P.G.
Controlling the dynamic state of metallic materials to maintain their surface strength. pp. 63--70
Summary: A method is considered how to improve the surface strength of metallic materials by filling up surface discontinuities with a composition that fulfils a relaxation function during thermomagnetic effects. Methods, equipment and results of experimental studies are described and curves of fatigue of different compositions of coating are shown.
Pogrebnyak A.D., Vasilyuk V.V., Kravchenko Yu.A., Kulmentyeva O.P., Alontseva D.L., Ruzimov Sh.M., Tyurin Yu.N., Bondarev A.A.
Duplex treatment of the nickel alloy applied to the steel 3 substrate. pp. 71--78
Summary: A high-speed pulsing plasma jet served to apply a Ni-based coating (PG - 10N - 01 and PGAN-33) from 60 to 110 µm thick. The coating on the steel 3 substrate surface was applied by plasma detonation and it was then molten with an electron beam. It is shown that after double treatment the coatings appear in solid and plastic intermetallide compounds (FeCr, Fe7Mo6, CrB) and the surface relief becomes smoothed. It is shown that the microhardness increases 4.5 times, wear reduces from 9 to 90 times, resistance to corrosion in the sulfuric acid and acidic environment becomes stronger.
Oglezneva S. A.
A diamond tool with phase transformations. pp. 79--84
Summary: A diamond tool has been developed based on the steel matrix that undergoes phase transformations when polishing natural rock. The effect of the phase composition on the triboengineering and cutting properties has been studied. A zone of phase transformation has been discovered near the friction surface; the width of the zone and microhardness within it depend on the scale of phase transformations in friction. The performance of the tool is governed by changes in its phase composition in operation. During friction on steel 45 and corundum the structure of the diamond tool undergoes phase transformation of metastable austenite into the strain martensite improving the triboengineering characteristics in proportion to the scale of phase transformations if the matrix does not contain any diamond grains. On the contrary, the cutting properties of the diamond tool are better when it is based on steel with a lesser concentration of nickel (PK10H12TiC8) because any higher contraction of nickel (PKlOH15TiC8) strongly reduces the zone of phase transformations. Hence zones appear with a very strong microhardness that inhibit normal performance of the diamond grain. The results of laboratory and full-scale tests were adequate.
Medelyaev I.A., Albagachiev A.Yu., Sorokin G.M.
The effect of surface energy on abrasive wear of materials. pp. 85--92
Summary: The effect of surface energy on abrasive wear of metallic materials is studied. The nature of the relation between the surface energy and the mechanical properties and structural state of steel has been established. It is shown that several extents of wear resistance correspond to a single level of surface energy due to different structures and energy capacities of steels. It is established that the surface energy tends to change in accordance with the temperature of annealing. It is shown that, unlike the strength characteristics, the surface energy better reflects the resistance of a particle to motion over the wear surface.
Rashkovan I.A., Krasnov A.P., Afonicheva O.V., Kazakov M.E., Arapov N.S.
The effect of the nature of mixtures of fibrous fillers on the pattern of tribochemical transformations of carbon plastics. pp. 93--98
Summary: The molded ÏA-6 based carbon plastic with additives and basalt fibers has been studied. It is shown that an optimal quantity of additives, such as glass fibers, improves the integrity of tribological indicators. Introduction of basalt fibers does not improve the tribological properties of the carbon plastic, though it has practically similar mechanophysical indicators of performance with glass fibers. It is due to a significant difference between their antifriction properties causing strongly different tribochemical transformations in carbon plastics and in the mechanophysical properties of surface layers.
Ivanov M.G., Kharlamov V.V., Buznik V.M., Ivanov D.M., Pavlyshko S.G., Tsvet-nikov A.K.
Tribological properties of the grease containing polytetrafluorethylene and ul-trafine diamonds. pp. 99--103
Summary: The effect of the additive of ultra-dispersed diamonds (UDD) and polytetrafluorethylene (PTFE) in oil È-12 on the triboengineering properties of steel-on-steel friction pairs is studied. It is shown that addition of the ultra-dispersed diamonds into the lubricating oil containing PTFE reduces the friction coefficient ad extends the friction track versus the lubricating material without any ultradispersed diamonds.
Pyatov V.V.
A study of friction of plastified metallic powders. pp. 104--107
Summary: It is studied how the coefficient of external and internal friction of metallic powders plastified with paraffin depends on the pressure, temperature and concentration of the plastifying agent. It is shown that in case the pressure of compaction becomes heavier the coefficients of internal and external friction of paraffin-plastified powders reduce. It is established that the powders become more alike as the concentration of the plastifying agent increases.
Kombalov V. S. p. 109
ÊÀËÅÍÄÀÐÜ ÊÎÍÔÅÐÅÍÖÈÉ. p. 110
