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: Problems are analyzed relating to the optimal shapes of conformal profiles of wheels and rails and how to maintain these shapes in operation.
Gritsai I.E.
A structural model of the process of wear of the gear milling hob. pp. 253--264
Summary: A method is describe how to model the durability of gear milling hobs based on the analysis of the parameters of sections and the forces which appear when metallic layers are removed on each active tooth and blade of the hob in the process of milling cylindrical tooth gears. The durability of each blade is determined as a function of its heating as a result of friction forces over the head and tail surfaces; the design durability is corrected with the allowance of the hardening induced by the preceding tooth of the hob.
Bereznyakov A.I., Ventsel E.S., Babenko A.A.
Correlation between the electrical conductivity of the oil film and the wear rate. pp. 265--270
Summary: A relationship has been theoretically established and experimentally validated between the electrical conductivity of the oil film and the wear rate of the friction couple. Experiments have manifested that a certain level of electrical conductivity strongly boosts the wear rate of friction units. It can be assumed that the electrical conductivity is a criterion to assess the wear resistance (the remaining life) of the oil.
Golub V.M., Pleskachevskii Yu.M.
Hydraulic density of the contact pair of the end seal. pp. 271--277
Summary: Conditions of friction of contact rings and the flow of the sealed fluid in end seals are studied. A model is proposed of the mechanism of tightness, together with the equations for assessing the leaks with the allowance for the viscosity of the separating film and its adhesive interactions with contacting surfaces.
Bronets Z., Kisel S.
The effect of vibration of static friction. pp. 278--281
Summary: It has been endeavored to explain the phenomena during static friction in contacting joints exposed to induced vibrations.
Radchik V.S., Ben-Nissan B., Myuller V.
The graph-analytical method of determination of the actual contact area of the rough surface using the specified curve of abbot-firestone. pp. 282--288
Summary: The article proposes a fundamentally new method of calculating the real area of the on the isotropiclly rough surface for which the curve of Abbot-Firestone is assigned. The analytical parts of the calculations obviates the need to determine the tallness of projections and their mean curvature radius. Instead only the mean pitch between the projections serves as a single statistical parameter. The method is suitable also to calculate the real contact areas on run-in surfaces.
Bulgarevich S.B., Kuzharov A.S., Kuzharov A.A., Shapkina G.P.
Molecular mechanisms of self-organization during friction. Part 3, Hypothetical mechanisms of reduction of viscosity of the fluid structured in the hydrodynamic clearance. pp. 289--294
Summary: Models are proposed to explain the causes of reduction of the viscosity of the dynamically structurally ordered fluid during hydrodynamic friction relating them the existence of the point of bifurcation on the dependence of the force of friction on the loading when mass and impulse transfer changes the hole mechanism to the relay mechanism. The latter are similar in the first approximation to the mechanisms of monomolecular SN1 and bimolecular SN2 substitution.
Smyshlyaeva T.V.
Assessment of the fracture energy in trip-steel during abrasive wear. pp. 295--298
Summary: The effect of the volume of deformational phase transformation on the resistance of tripsteels to abrasive wear is estimated with the account of the phase compositin of debris. Optimally 85% of the energy of frictional interactions are consumed by phase transformations.
Pogodaev L.I., Chulkin S.G., Dudko P.P., Kuzmin V.N.
Structural energy approach to the assessment of the effect of lubricating compositions on wear rate of tribocouples. Part 2. Results of laboratory studies. pp. 299--304
Summary: The effect of lubricating compositions with a variety of additives (friction modifiers, metal conditioners, reducing agents and others) on the wear resistance of gray iron galvanized friction pairs has been studied. Triboengineering tests of the additives RiMET, SURM, Royal Effect, Alcon and Resources have been performed and the features of wear of friction couples have been studied.
Mrochek Zh.A., Ivashchenko S.A., Frolov I.S.
Triboengineering behavior of vacuum-plasma coatings. pp. 305--310
Summary: Results of studies of the wear resistance of vacuum-plasma electric arc coatings on specimens from non-magnetic metallic materials show a relationship between their triboengineering characteristics and those of the substrate. Optimal parameters of coating deposition are determined when parts are intended to operate during friction without lubrication. Guides are proposed which materials produce coatings with higher wear resistance.
Abdrashitov E.F., Ponomarev A.N.
Study of friction and adhesion of plasma-modified siloxane elastomers. pp. 311--316
Summary: A comparative study of the frictional, adhesive and mechano-physical characteristics of siloxane rubbers has been performed before and after plasmachemical modification. Methods of laboratory measurements are described. It is shown that modification reduces the coefficients of friction and ah of the rubber to the counterbody surface within the temperature range from -120 to+170 °C. It has bee] revealed that the plasmachemical modification dos not practically affect the mechano-physical behavior of the rubbers.
Popov A.N., Kazachenko V.P., Rogachev A.V., Sidorskii S.S.
Improving wear resistance of friction surfaces by applying multiple coatings. pp. 317--321
Summary: The conditions of application and the structure of titanium nitride based multiple coatings have been studied to assess their effect on the triboengineering characteristics during friction without lubrication and in the diesel fuel. The coatings made up by successively arranged layers of titanium nitride, copper and polytetrafluorethylene have shown the best Characteristics. The wear rate of the steel-coating friction pairs is an order of magnitude smaller than that of the steel--steel pairs, the coefficient of friction reduces from 0.35 to 0.15.
Savchenko N.L., Korolev P.V., Mel'nikov A.G., Tarasov S.Yu., Kul'kov S.N.
Friction and wear of transformation hardened composites with metallic and ceramic matrices. pp. 322--331
Summary: The paper shows the results of studies of the structures of friction surfaces and triboengineering characteristics of biphase ceramics Y--TZP containing 97 mole % ZrO2 + 3 mole % Y2O3 and alloys TiC--NiTi after friction over a steel disk within a broad range of velocities (0.9 ¸ 9.4 m/s for the composites with the metallic matrix and 0.2 ¸ 11.1 m/s for the composites with the ceramic matrix) under a pressure 5 MPa. At slower velocities of friction the wear resistance of Y--TZP and TiC--NiTi depends directly on the capacity of the matrix to undergo martensite transformation, higher velocities do not affect the wear rate. The Y--TZP ceramic produces a continuous transfer layer on the friction surface which acts as a "soft" protective coating reducing the wear rate at higher friction velocities. When TiC--NiTi is applied, the processes of extrusion of the binder in the softened/molten state from the intercarbide space into the tribocontact zone govern the behavior of materials during friction at velocities > 4 m/s.
Abramenko V.V., Sviridenok A.I., Leshchik S.D.
Triboengineering characteristics of iron-graphite inserts under the effect of boundary lubrication and moisture. Part 1. pp. 332--337
Summary: The triboengineering characteristics of friction between the copper wire and the graphitized carbon insert have been studied revealing that the conductive grease Graphbin-1 reduces the friction coefficient 1.2--1.4 and wear 1.6--1.8 times.
Skaskevich A.A., Struk V.A., Kravchenko V.I., Kholodilov O.V.
Resistance to abrasive wear of polyolefins modified with small dopes of ultradisperse carbon clusters. pp. 338--341
Summary: Resistance to abrasive wear of polyolefins modified with small dopes of ultradisperse carbon clusters was investigated. It was shown that the best modification is reached when 0.01--0.05 wt. % of ultradisperse diamond-containing graphite is added. It was revealed that the viscosity-temperature behavior of the modified polymer composites remains stable at their repeated processing.
Latyshev V.N., Naumov A.G.
The lubricating and chemical effect of the environment when cutting metals. pp. 342--348
Summary: The problems of improving the lubricating effect of coolant lubricants during friction and cutting of metals have been studied. The theory of radical-chain reactions has served to demonstrate the effect of various substances, including additives, under high pressure on the conditions of contact between metallic surfaces. The existing theories are reviewed which describe the causes of modification of the tribological conditions in the zone of contact when coolant lubricants are delivered externally.
Sorokin G.M.
Problems of technological upgrading of various machine building industries. pp. 349--353
Summary: A top priority task of technological progress at the present stage is discussed which relates to the need to upgrade the morally and physically obsolete equipment primarily due to its wear; the complexities of solution of the problem are highlighted relating to the aspects of specific characteristics of metals, tribology and general organizational structure.
ÊÀËÅÍÄÀÐÜ ÊÎÍÔÅÐÅÍÖÈÉ. p. 358