Трение и износ, 1996, Vol.17, No.2

Трение и износ, 1996, Vol.17, No.2

ТРЕНИЕ И ИЗНОС
Международный научный журнал
Published by INFOTRIBO Ltd., Gomel, Belarus

Том 17, номер 2; март-апрель, 1996

СОДЕРЖАНИЕ

СТАТЬИ

Mikityanskii V. V., Mikityanskaya L. M.
Oscillations influence on friction ofstationeary contact under condition of preliminary displacement. pp. 151--155
Summary: The influence of oscillations on friction force behaviour of stationary contact under condition of preliminary displacement has been investigated.

Alifanov A. L., Sladkova L. A.
On statical description of experimental data at the abrasive wear. pp. 156--162
Summary: We analyze possibility of mathematical statistic to estimate influence of different factors on the abrasive wear. The analysis of experimental data for determining order and kind of regression equation is made using the finite differences. This permits one to describe the features of the end ripper wear at the natural solids at the negative temperature at the Extrema North.

Drozd S. G.
Contact of spheres with taking account of damage and change in mechanical properties in surface layer. pp. 163--169
Summary: The approach, which allows to model a contact of friction pairs taking into account damages accumulation and change of physico-mechanical properties in coating or in surface layer of contacting bodies, is offered in this article. Change of the contact area characteristics of two spheres with different radius is investigated by modified Herz problem. Obtained results indicate on the change of contact conditions. The developed model permits to predict the reliability, durability and beginning of the friction contact pairs destruction.

Loukashenko V. I.
Analysis of contact parameters calculation of nonmetallic sliding bearings. pp. 170--177
Summary: Calculation of contact parameters of sliding bearings is made with using a new data on modules of normal elasticity and angle of contact. More exact formula for angle of contact is proposed.

Pekoshevski V., Potekha V., Shcherek M., Vishnevsky M.
System analysis in tribological tests. pp. 178--186
Summary: A system analysis in tribotests has been accomplished to identify the effect of the environment on the rubbing members of a system and the effect of noise on the reproducibility of the test data. The analysis has lead to a concept of a system of tribological tests (STT) covering the most important friction units and the methods of their studies. Efficient devices have been developed for tribotests of materials with the implementation of the STT. A multipurpose microprocessor control system has allowed to computerize the tribotests.

Krasnov A. P., Fedorova L. S., Mit V. A., Rogovina L. Z., Vasylyev V. G., Riskin V. B.
Structure and friction of modified cross-linked polyimides. pp. 187--193
Summary: The influence of the chemical structure and the size of intercross-link fragment of the network polyimide on friction and wear of the antifriction coatings have been investigated. Better tribological properties have been obtained by introduction of linear pyromellitimide into the network structure and by conservation of optimal quantity of double bonds of the maleimide cycle.

Balakin V. A., Sergienko V. P.
Frictional heat resistance tests of materials. pp. 194--201
Summary: Methods of material tests on thermal friction are analysed. Practical value have methods modeling the real service conditions of friction unit. The technique of determining frictional heat generation, heat transfer and thermal conductivity of materials are described.

Prushak V. Y.
Some way of a creation of composed materials based on elastomer and its friction properties regulation about. pp. 202--206
Summary: Based on a polymer deformations and wear regularities analysis have been reported some aspects of elastomer composed materials creation and its friction properties regulation. From a point of view theory and a friction material science a methodological approach to the question of a wearing process governing for such materials has been carried out.

Tyshchenko V. A., Shabalina T. N., Badyshtova K. M., Sheikina N. A.
Study of antiwear effect of phosphorus-containing additive in low-viscous oil. pp. 207--212
Summary: The paper presents the results of study of antiwear action of phosphorus-containing additive (trixylenyl phosphate) in hydraulic oil at dynamic conditions of friction with a metal. Possible variants of this additive action mechanism in low-viscous oil are discussed.

Antsiferov V. N., Shatsov A. A.
Friction and wear of powder aluminium bronze of optimal composition. pp. 213--217
Summary: Tribological behavior of powder aluminum bronze (12% Al, 8% Fe, 4% CaF₂) at dry friction was studied taking into account the effects of porosity, contact pressure and content of solid lubricant CaF₂.

Okhlopkova A. A., Ustych Yu. N.
Influence of oxides of some metals on polytetrafluoroethylene properties. pp. 218--220
Summary: Influence of oxides of chromium and zirconium and conditions of fillers mechanic activation on mechanical and tribological characteristics of polytetrafluoroethylene is investigated. The positive effect of polymer modification by both addition fillers and activation is shown.

Antsupov V. P., Saveliev V. B., Savelieva R. N.
Application of deformational cladding with flexible tool for improving wear resistance of friction pairs. pp. 221--224
Summary: The wear resistance of coatings which were applied by the method of cladding with the flexible instrument has been studied. The use of the most effective polymer coatings on the bearings and knives has permitted to increase their service life eight times and even more.

Falaleev S. V., Zjizjkin A. M.
Clogging of filters and throttles and their influence on face seal performance. pp. 225--229
Summary: The throttles and filters of face seal and their influence on temperature deformations of seal rings and size of clearance are considered. Is revealed, that at calculation of resource of face seal is necessary to be taken into consideration clogging of filters and throttles. The characteristics of their reliability are received. The algorithm of designing of such seals is offered.

Poletaev V. A., Tretyakova N. V.
The wear of the card clothing teeth. pp. 230--234
Summary: The experiments are made to reveal the influence of magnetic pulsed processing on the metal structure and mechanical properties of tape teeth. It is stated that magnetic pulsed processing results in HV hardness increasing of the tooth top hardened part, the reduce of internal tensions and the increase of clothing teeth wear resistance.

Spiridonov I. M., Alkema V. G.
Wear resistance of diffusion boron-suicide coatings. pp. 235--240
Summary: A method of boron siliconizing in moving alloying mixtures and evaluation of wear resistance of boron-silicide coatings are described. Results of wear testing of the coatings at dry friction and at rubbing against fixed abrasive are presented. The optimum powder compositions for boron siliconizing are proposed providing the highest wear resistance. A relationship has been established between the wear rate and silicon concentration in the boron-silicide layer. The phase composition, structure and behavior of the diffusion zone are shown to affect wear resistance of the layer.

Nosovski I. G., Kramar V. G., Nosovski O.I.
Influence of electric-spark alloying of surface layers on their tribological behaviour. pp. 241--245
Summary: The data are given on tribological characteristics of coatings applied by electric-spark alloying. They are compared to those obtained for diffusion alloying. Based on metallographic analysis the hardening mechanism of electric-spark alloying is described.

Drobyshevskiy V. N.
Run-in coatings for diesel engine cylinder liners. pp. 246--248
Summary: Data on tests of a multicomponent coating for running-in cylinder-piston groups of diesel engines are given. The run-in coating for a chrome -- cast iron friction couple is considered. A mechanism of producing a double-layer coating is advanced.

Shaglayan A. S., Butko V. A.
Investigation of load-carrying capacity of hydrostatic supports in high-speed hydraulic actuators. pp. 249--254
Summary: The paper gives the data on the test of load-carrying hydrostatic supports as actuating mechanisms in vibration-testing machines. The lateral load influence on the piston axle radial displacement is determined as related to bush axles of hydrostatic supports when varying pressure in support chambers. It is also found the relationship between support stiffness and fluid pressure in chambers.

Zamyatin Yu. P., Zamyatina L. A., Zamyatin A. Yu., Zamyatin V. Yu.
Development of scientific concepts and engineering methods of evaluation and provision of reliability of transport tribosystems. pp. 255--258
Summary: The problems of providing the reliability of transport tribosystems are considered. The current state of the art, conclusions and recommendations are discussed basing on the experimental and theoretical investigations performed in the Friction Laboratory of the Rybinsk Aviation Technology Institute. Promising trends in further work arc defined.

ОБЗОРЫ

Shilko S. V.
Experimental and combined test-calculation methods to determine contact stresses. Part I. pp. 259--270

Summary: A review of experimental methods for contact pressures determination is presented. The advantages and disadvantages of different approaches, as applied to the tribology problems, are discussed.

ЛЮДИ НАУКИ

Nikolay B. Demkin (To 70th anniversary). pp. 271--272

КАЛЕНДАРЬ КОНФЕРЕНЦИЙ. pp. 273--274

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