Wyniki wyszukiwania - Biblioteka Nauki

1

The effectiveness of manufacturing technology of antifriction composite parts based on nickel

100%

Roik T. , Vitsuk I.

Selected Engineering Problems

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2016

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tom nr 7

49--56

EN

In a paper the research results of structural periodicity in the antifriction composite parts based on nickel with solid lubricant caf2 have been presented. The periodicity of structure was studied using Fourier analysis. Analysis of the structural status complexity and rheological characteristics of the friction surface was carried out by two-dimensional diffraction spectrum. This analysis determines the average size o f structural components, the distance between them, the concentration and length o f interphase boundaries. Fourier analysis method was used to check, prove and confirm the correctness o f new composite antifriction parts' manufacturing technology. This method has shown the homogeneity o f the composite material as a whole that proves the efficiency o f the developed manufacturing technology. The developed technology provided the high tribological characteristics o f the new parts for printing machines.

2

Boundary conditions analysis of the possible use of bushings made from copper composite materials for a towing vehicle’s chassis

80%

Roik T. , Gavrish O. , Vitsiuk I. , Khmiliarchuk O.

Scientific Journal of the Military University of Land Forces

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2018

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tom Vol. 50, No. 1(187)

140--149

EN

The paper analyzes the possible boundary conditions for the application of new type of bushings in the vehicle’s chassis. The bushings have been manufactured from the copper-based antifriction composite material alloyed by nickel and molybdenum, with the addition of CaF2 as a solid lubricant (DN5M3KF9). The structure and tribotechnical properties at heavy loaded reversing friction (the temperature of 400-6000С and pressure up to 6.0 MPa in air) have been examined. The study focuses on the distribution of CaF2 in the composite with a Cu–Ni–Mo matrix, its role in self-lubrication of the material, and the behavior of CaF2 in the friction area under extreme operating conditions. It was shown that the solid lubricant is evenly distributed over the contact surfaces as it piles up over the entire friction area during heavy loaded reversing friction. It is established that the tribofilms formed in the presence of the CaF2 solid lubricant provide high wear resistance. Tribological properties allow for extending the application boundaries of the new bushings based on copper in the vehicle chassis for towing artillery guns.

3

Operating properties of composite antifriction materials on the base of aluminium alloys wastes for printing equipment

70%

Roik T. , Gavrish A. , Kyrychok P. , Vitsuk Y. , Dorfman I.

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2013

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tom Vol. 4, no. 3

23--27

EN

The questions of using materials for friction units, first of all, the antifriction materials in particular on the aluminium alloy-based metal matrix take a central place in general problem of increasing the polygraph knife-machines quality. Endurance of such equipment determines a level of printing output quality. This paper summarizes the recent developments of aluminium alloy AK12MMgN industrial grinding wastes-based usage for new antifriction materials and knowledge about their manufacturing technology; specific examples will be given. Research results of new composite material physical, mechanical and tribological properties in comparison with cast alloy have been presented. The principle possibility to use the valuable industrial grinding wastes of ferrous and color metals for manufacturing of an effective parts of polygraph machines was shown.

4

Physical, mechanical and tribotechnical properties of new composite bearings for printing equipment

70%

Roik T. , Gavrish A. , Kyrychok P. , Vitsuk Y. , Askerov M.

Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki

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2014

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tom Nr 2

141--149

EN

In the article the research results of structure, physical, mechanical and tribotechnical properties formation of new bearings on the nickel alloy EP975–based composite materials with solid lubricant CaF2 additions for high speed printing machines have been presented. The paper summarizes the formation of new materials’ structure and properties after using new making hot isostatic - pressing technology. The efficiency of developed making technology with next heat treatment for new high speed bearings that is confirmed by the results of complex experimental and industrial tests was shown. Such technology is able to ensure the high and stable level of functional properties. The experimental results of the new composite bearing material properties in comparison with known nickel composite have been presented. It was shown that the dense friction films were formed on the contact surfaces during tribological tests. Friction films defend contact surfaces against intensive wear and stabilize the work of friction unit in printing machine. The full–scale industrial tests of ЕP975–CaF2 bearings showed increase in wear resistance by a factor of 3.2–6.0 compared with known bearings in friction units of Heidelberg Speedmaster SM–102–FPL and KBA Rapida–105 high speed printing machines.

PL

W artykule przedstawiono wyniki badań struktury, fizycznych właściwości mechanicznych i tribologicznych nowych łożysk wykonanych ze stopu niklu EP975 wypełnionych smarem CaF2 przeznaczonych do szybkich maszyn drukarskich. Artykuł podsumowuje powstawanie struktury i właściwości nowych materiałów przy wykorzystaniu technologii izostatycznej tłoczenia na gorąco. Wykazano skuteczność technologii obróbki cieplnej nowych łożysk wysokiej prędkości, która została potwierdzone przez wyniki kompleksowych badań doświadczalnych i przemysłowych. Technologia ta jest w stanie zapewnić wysoki poziom i stabilność właściwości funkcjonalnych. Przedstawiono wyniki porównawcze właściwości nowego materiału kompozytowego przeznaczonego na łożyska w porównaniu z kompozytem niklu. Ponadto przedstawiono tarcie na powierzchniach stykowych podczas testów tribologicznych. Film smarowy chroni powierzchnie styku przed intensywnym zużyciem oraz umożliwia ustabilizowanie pracy jednostki tarcia w maszynie drukarskiej. Pełna skala testów przemysłowych łożysk ЕP975 – CaF2 wykazała zwiększoną odporność na zużycie współczynnik 3,2 – 6,0 w porównaniu ze znanymi łożyskami w jednostkach tarcia Heidelberg Speedmaster SM –102– FPL i KBA Rapida – 105 szybkich maszyn drukarskich .