Trenie i Iznos (Friction and Wear), 1998, Vol.19, No.5
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Trenie i Iznos (Friction and Wear), 1998, Vol.19, No.5
Volume 19, Number 5; September--October, 1998
CONTENTS
ARTICLES
Drozdov Yu.N., Kovalenko E.V.
Theoretical studis of the life of a sliding bearing with a liner. pp. 565--570
Summary: On the basis of the wear equation obtained with the help of the methods of the similarity theory and analysis of dimensions and containing a number of dimensionless complexes, describing mechanical, thermal, and chemical properties of bodies in contact, an algorithm of calculation of the durabihity of cylinder sliding liners is developed.
Zharov I.A.
Model analysis and development for complex tribosystems. pp. 571--578
Summary: Several important aspects of model analysis and development are discussed. An approach is proposed to estimate the accuracy of models.
Bereznyakov A.I., Wentsel E.C., Babenko A.A.
Wear rate equation taking into account the interaction of wear particles with the surface. pp. 579--584
Summary: The tribojoint wear rate equation is found taking into account the interaction of wear particles with the surface. On the basis of the interaction model of the neutral and light-inequilibrium an equation, relating king the wear rate with the roughness, concentration and the contaminated particles dimension, the contour pressure and the material hardness was obtained. It is shown that the wear rate decreases with the growth of the dislocations density in the model of the little dislocations.
Tchoulkin S.G.
Estimation of a resistence of wearing of gear transfers by power criterion. P. 2. pp. 585--589
Summary: Methods of determination of power criterion W*crit. are considered. In the context of the structure -- energy theory, the analyzed influence of various modes of electric discharge machining on a wear resistance and durability of gear wheels is analyzed.
Balakin V.A., Shilko S.V., Pashkovskii Yu.N., Starzhinskii V.E.
Frictional heating at grinding the rolling surfaces of railway wheels. pp. 590--598
Summary: The formulas are derived for temperature calculation in a frictional contact of railway wheel and abrasive tool at grinding.
Moiseeva T.M., Kholodilov O.V., Meshkov V.V.
Methodology of creating classification criteria of rubbing joint friction state based on multistate statistical analysis. Part 2. Identification of wear process of polymer composites. pp. 599--605
Summary: The problem of wearing of polymer composites is considered based on the statistical analysis of acoustic emission at friction.
Grigoriev A.Ya., Peng Zh., Kirk T.B.
Classification of wear debris on texture using matrices of co-occurrence. pp. 606--615
Summary: The method and the results of texture classification of three types of metallic wear debris are presented. Three-dimensional images of laminar, fatigue chunk and severe sliding wear particles obtained from laser scanning confocal microscopy have been used as initial data. The textures of these three types of wear debris, are then, characterized by a number of statistics extracted from a special case of co-occurrence matrix. The matrix represents the frequencies of co-occurrence of the azimuth orientation between gradients of a pair surface points and the distance between them. The study has shown that the surface textures of wear debris characterized by the extracted parameters occupy linear separable domains in the feature space, and therefore, can be distinguished. The results presented in the paper have demonstrated that the proposed approach coincides well with the texture distinction of an expert's visual perception, and it is sufficient to reflect the semantic interpretation of the distinction.
Voronin N.A.
Abrasive resistance and bearing capacity of thin vacuum ion-plasma coatings. pp. 616--622
Summary: The results of a research of abrasive wear-resistance of TiN coatings are presented depending on magnitude of partial pressure of nitrogen in the vacuum camera, thickness and hardness of coating, and test specifications. TiN coatings are deposited by electric are evaporation in vacuum. The evaluation of conditions and reasons of loss of load-carrying capacity of PVD coatings is given.
Dzhanakhmedov A.Kh., Mamedov V.T., Dzhanakhmedov Ye.A., Gadzhieva L.S.
Determination of the self-sealing effect limits in packers. pp. 623--627
Summary: The terms are defined in order to satisfy the inside and outside diameter of elastic element at internal pressure when the packer elastic element gets self-sealing. The energy losts coefficient due to friction and self-sealing limits are experimentally defined.
Rusin N.M., Savitskii A.P., Bataev A.A.
Effect of graphite on tribotechnical properties of sintered Al--Ti system alloys. pp. 628--632
Summary: The effect of graphite on tribotechnical properties of sintered aluminium alloys containing a great amount of an intermetallic compound has been studied under conditions of dry friction as well as friction with lubricant. It was shown that graphite influences weakly on the friction coefficient, but decreases markedly the ability of the alloys to sustain load in particular during low-speed sliding.
Makarov A.V., Korshunov L.G., Kogan L.Kh., Gorkunov Ye.S, Solodova I.L., Osintseva A.L.
Abrasive wear resistance of carbon and low-alloy tool steels and its evaluation by the nondestructive methods. pp. 633--641
Summary: The effect of carbon content (to 1.2 wt. %) on the abrasive wear resistance of carbone steels was studied. It was found that among the used alloy elements (Mo, V, Mn, Si, Cr -- from 1 to 2 %) only vanadium substantially increases the wear resistance of the high-carbon martensite formed in the steels upon volume and laser quenchings. The mentioned elements did not eliminate the abrupt decrease in the abrasive resistance of tool steels after low-temperature tempering but Si, V and Mo can substantially increase the wear resistance of the steels tempered at temperatures above 250°C. It was shown the possibility to evaluate the abrasive wear resistance of low-alloy tool steels by the coercimetric and eddy-current methods.
Yerokhin A.L., Matthews A., Dowey S., Lyubimov V.V.
Friction performance of MDO coatings produced byplasma-assisted deposition. pp. 642--646
Summary: Capabilities of friction enhancement of MDO coatings on Al alloys by plasma-assisted deposition of thin carbon-based surface layers are considered. Friction coefficients are determined for the coatings, at pin-on-disc sliding against tungsten carbide. The plasma-assisted deposition is found to decrease friction coefficient from 0.62 till 0.18 and stabilize friction behaviour of the pair due to decrease of adhesion between the bodies.
Bogdanovich P.N., Starikov S.V.
The influence of ultraplastic fillers on the properties of compound materials for friction units. pp. 647--649
Summary: Modification of frictional compound materials by ultraplastic disperse fillers is shown to be the effective way to increase their wear resistance. The influence on the filler content and the operating conditions on wear rate and coefficient of friction in compound material-steel contact is considered.
Vinogradova O.V., Bazhenova V.B., Krasnov A.P., Gribova I.A.
Specificity of thermofriction inflence in polymers mixtures. pp. 650--658
Summary: The structure and properties of materials based on anilinephenolformaldehyde oligomere-polyheteroarylene blends were studied by thermomechanical methobs, dynamic mechanical tests, dynamic thermogravimetry, and some other techniques. Thermal processing of the mixtures leads to the formation of chemical bonds between components of polymeric system. In the process of thermofriction influence tribochemical processes lead to lowering and thermal stabilization of friction coefficient of formed cross-linked polymer. The materials are characterized by high wear resistance.
Hung-Gu Han, Hosung Kong, Oh Kwan Kwon, Myshkin N.K.
An experimental study on friction and wear characteristics afair-curable MoS2 films with polymeric binder. pp. 659--664
Summary: The effect of binder on the tribological behavior was experimentally evaluated for air-curable MoS2 bounded films. The binders were basically alkyd and acryl-based resins were modified by nitrocellulose. Effect of the binder ratio to solid lubricant and the molecular weight of binder were also investigated when testing the tribological behavior. For the test, LFW-1 and Falex tester were used to measure mainly the endurance life and load-carrying capacity of films. Results showed that methacrylic resin has the better performance than those of other resins, and the properties of lubricants both of alkyd and acrylic resins could be improved by modification with nitro-cellulose. It was also shown that the optimum ratio of nitro-cellulose was dependent on the type of binder and test machine.
Struk V.A., Ovchinnikov E.V., Boiko Yu.S., Senko A.F., Rogachev A.V., Gubanov V.A.
Morphological peculiarities of coatings of rubber based on fluorine-containing olygomers. pp. 665--670
Summary: Studies in a structure of thin coatings flyorine based on containing olygomers on rubber products are made. It is established, that power effect results in formation of quasicrystal structures. Tribotechnical properties of rubbers, modified flyorine-containing olygomers, are investigated.
Burya A.I.
The friction and wear of organoplastics based on polyamide-6. pp. 671--676
Summary: The data on influence of nature and contents of chemical fibres on tribotechnical characteristics of composites based on polyamide-6 are given. It is shown, that maximal reinforced effect is achieved at use of fibers with similar nature as binder. The greatest decrease of linear wear intensity and friction coefficient is observed at increase of fibers tensile strength up to 60 gs/teks.
Golovchenko I.P., Chumichev A.A., Melnikova E.P.
Definition of the components of honing compound on the basis of non-organic polymers. pp. 677--682
Summary: Results of studies of the selection of components of a honing composition on the basis of the soluble glass Na2SiO3 are given. A dependence between the wear intensity, roughness of conjugated gears' surface, and the concentration of the components of silicate honing composition is defined. Results of comparative tests of honing compositions on the basis of mineral oils and sodium silicate are described.
MEN OF SCIENCE
Michael N. Dobychin (60 years since Birthday). p. 683
CHRONICLE
8th International Conference on Tribology "NordTrib-98". pp. 684--685
I.V. Kragelskii seminar on mechanics of friction. p. 685
CONFERENCE CALENDAR. pp. 686--687
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Copyright © 1999 The National Academy of Sciences of Belarus
Copyright © 1998 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
