PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Boundary conditions analysis of the possible use of bushings made from copper composite materials for a towing vehicle’s chassis
Roik T., Gavrish O., Vitsiuk I., Khmiliarchuk O.
Scientific Journal of the Military University of Land Forces
|
2018
|
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.
2
Content available The effectiveness of manufacturing technology of antifriction composite parts based on nickel
Roik T., Vitsuk I.
Selected Engineering Problems
|
2016
|
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.
3
Content available Friction behavior of new composite bearing materials for printing machines and their special use under heavy operating conditions
Roik T., Gavrish A., Vitsiuk I., Khlus O.
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
|
2015
|
Nr 4
100--108
EN
In the paper the friction film formation analysis of the new composite bearings based on powder nickel alloy EP975 with solid lubricant CaF2 powder after tribological tests has been presented. Dense films are formed during friction of contact surfaces for tribological tests at high speed (or temperature) and loads. Such films consist of chemical elements of friction pair and air oxygen. Friction film is a determining factor for the antifriction material. It is connected with the nature of friction films. The films can minimize friction and ensure stability of a friction unit. It depends on the combination of chemical elements and oxygen in the films formed. The chemical composition of friction films not only allows ex-plaining the mechanism of their formation, but also gives the possibility to forecast and control the functional properties of bearing materials in wide range of printing machines under operating conditions. New composite bearings can be successfully used in the military equipment nodes, such as sliding divices nodes of artillery weapons.
4
Content available Effect of the friction films’tribosynthesis mechanism on the antifriction properties of composite materials based on nickel
Roik T., Gavrish A., Vitsuk J.
Selected Engineering Problems
|
2015
|
nr 6
81--90
EN
In a paper the results of effect the friction films’ tribosynthesis mechanism on the antifriction properties of new composite materials based on nickel with solid lubricant CaF2 for high speed printing equipment have been presented. Paper generalizes the formation of antiscoring films, so called secondary structures, on the contact surfaces of the examined materials during friction process. Research of the friction surfaces was carried out using the method of Auger spectrum analysis. It was shown the mechanism of the antifriction films’ tribosynthesis depends on operation conditions, material and counterface chemical composition. It has been demonstrated that it is possible to predict and control the anti-friction properties of materials by technological means. To do this, it is necessary to choose a chemical composition of the friction pair, which could ensure the high functional properties, and could open a possibility purposefully to choose the operating conditions of the material in a printing equipment’s friction unit.
5
Content available Physical, mechanical and tribotechnical properties of new composite bearings for printing equipment
Roik T., Gavrish A., Kyrychok P., Vitsuk Y., Askerov M.
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
|
2014
|
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 .
6
Content available Effect of making technology on the antifriction properties of new bearings for printing machines
Roik T., Gavrish A., Kyrychok P., Vitsuk Y.
Selected Engineering Problems
|
2013
|
nr 4
147--152
EN
In a paper the results of effect the developed making technology on the antifriction properties of new bearings on the nickel alloy EP975-based composite materials with solid lubricant CaF2 additions for high speed printing equipment have been presented. Paper summarizes the formation of new materials’ structure and antifriction properties after new manufacture technology using. It was shown the efficiency of developed making technology for bearings that is confirmed by the results of industrial tests. The results of new composite material’s tribotechnical properties in a comparison with known nickel composite have been presented. Full-scale industrial tests of the new composite bearing materials in friction units of printing machines have been conducted. Visual inspection and measurement of surface roughness show that the contact surfaces of bearings are not damaged, have high quality, and are usable. Industrial tests of ЕP975–CaF2 bearings showed increase in wear resistance by a factor of 3.2 – 6.0 compared with known bearings.
7
Content available Operating properties of composite antifriction materials on the base of aluminium alloys wastes for printing equipment
Roik T., Gavrish A., Kyrychok P., Vitsuk Y., Dorfman I.
Challenges of Modern Technology
|
2013
|
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.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.