Temat: wear products - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Quantitative and Qualitative Comparison of Tribological Properties of Railway Rails with and without Heat Treatment
Autorzy:: Bąkowski, H.
Piwnik, J.
Powiązania:: https://bibliotekanauki.pl/articles/351381.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fatigue wear
wear products
crack
metallographic examination
operational factors
Opis:: The paper provides a comprehensive presentation of the influence of operating parameters on the tribological properties of the wheel-rail couple. Apart from wear and a friction coefficient, the tribological properties also comprise stereological parameters of flaky wear products. The tribological tests were carried out according to an experimental plan, which took account of the complex influence of operational factors on the size and shape of flaky wear products. This enabled defining the type and intensity of wear, depending on the variable operational parameters. In order to explain the wear mechanism, quantitative, qualitative, and profilographometric metallographic examinations were made.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 2A; 469--474
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Possibilities of extension of gear oil service life in rail vehicles
Autorzy:: Muślewski, Ł.
Sójka, M.
Landowski, B.
Markiewicz-Patalon, M.
Powiązania:: https://bibliotekanauki.pl/articles/244369.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
rail vehicle
lubricity
ignition temperature
concentration of wear products
kinematic viscosity
Opis:: The study deals with the results of operational tests of gear oils used in a regional railway transport system. The character of the aging process and the impact of gear oil operation on the main factors determining further usability of gear oil have been defined on the basis of the results of carried out tests. It was proved that transport systems lack reliable convenient diagnostic methods for gear oil used during the process of operation. One of the criteria taken into consideration in decision-making is the period of oil change imposed by the gear manufacturer. The long process of oil application is accompanied by physicochemical changes, which cause degradation of its properties. This phenomenon is referred to as oil aging. This fact can cause loss of viscosity, increase in the amount of pollution, and in effect a decrease in the ability to provide a durable boundary film. The lubricating ability of oil decreases as well. An increase in the amount of pollution is caused by interaction of the collaborating friction elements and by pollutants coming from the gear environment. These changes are of permanent character and reflect the state of new characteristics referred to as operational characteristics. Gear oils have a certain lubricating ability, which is a critical parameter. This study is an attempt to find a way of the oil service life extension and convince the propulsion systems manufacturers that reduction of costs connected with rail vehicle maintenance does make sense.
Źródło:: Journal of KONES; 2018, 25, 4; 309-316
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fretting-Wear Mechanism of Textured Surfaces
Autorzy:: Pashechko, Mykhaylo
Marchuk, Volodymyr
Kindrachuk, Myroslav
Tisov, Oleksandr
Kornienko, Anatolii
Dukhota, Oleksandr
Powiązania:: https://bibliotekanauki.pl/articles/101973.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: wear mechanism
fretting
wear products
textured surface
dimple
mechanizm noszenia
produkty noszenia
teksturowane powierzchnie
wgłębienie
Opis:: The wear mechanism of textured dimpled in conditions of lubricated fretting-wear is established, which, in contrast to others, takes into account possibility of removing deterioration products out of tribo-contact areas into dimples, preventing their action as abrasive material. Selection of optimal structural parameters of selectively dimpled areas allows to reduce duration of tribological couple running-in time. Depending on texture type, friction coefficient was reduced from 0.27 (for untreated furface) to 0.18, and wear loss – from 7.8 ×10–3g to 3.3 ×10–3g.
Źródło:: Advances in Science and Technology. Research Journal; 2019, 13, 3; 186-191
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Hydrogen effect on the high-nickel surface steel properties during machining and wear with lubricants
Autorzy:: Balitskii, O. A.
Kolesnikov, V. O.
Balitskii, A. I.
Eliasz, J. J.
Havrylyuk, M. R.
Powiązania:: https://bibliotekanauki.pl/articles/1818505.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: hydrogen
chip
fracture
wear products
lubricant-cooling technological environment
wodór
zrębki
pęknięcie
produkty zużycia
Opis:: Purpose: The aim of the proposed research is to investigate the hydrogen effect on the high-nickel steel surface properties changing during machining and wear with participation of lubricant-cooling environments. Design/methodology/approach: The approach of the fracture mechanics and physicalchemical methods surface properties investigation was used to formulate the conclusions. Applying of lubricant-cooling (liquid, solid, gaseous) technological environments (LCTE) has change the morphology of chips and roughness of contact 23Ni1Mo3Ti steel surfaces depending on the experimentally fixed hydrogen concentrations (4.62…12.0 ppm). It correlates with both the roughness of the treated surface and the nature of the cutting products fragmentation: the maximum concentration of hydrogen - in the chips coincides with the minimum size of its defragmentation and reduction of the surface roughness. For nitrogen and oxygen, a similar relationship is traced poorly. Findings: On the basis of the fracture mechanics approaches it is confirmed, that in the conditions of the application of hydrogen containing (as chemical composition) (up to 12 ppm) and hydrogen accumulated (in nano container) (up to 600 ppm) LCTE, hydrogen enters the near crack initiation contact zone before fracture and taking part in changing structural material fracture mechanisms, improves its mashinning processes. Research limitations/implications: The results obtained on laboratory specimens should be tested during machining of real details made from high-nickel steel. Practical implications: The created technological approaches can be used in practice evaluation of mechanical properties and residual of modern gas turbine parts. Originality/value: It was shown, that hydrogen containing (in chemical composition) and hydrogen accumulated (in nano container) LCTE permits the hydrogen to enter in the near crack initiation contact zone before fracture and taking part in changing structural material fracture mechanisms.
Źródło:: Archives of Materials Science and Engineering; 2020, 104, 2; 49--57
1897-2764
Pojawia się w:: Archives of Materials Science and Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Odporność na zużycie ścierne i niszczenie wodorowe austenitycznych stopów Fe-Mn-C
The wear resistance and hydrogen resistance of austenitic FE-MN-C alloys
Autorzy:: Balitskii, A.
Chmiel, J.
Kawiak, P.
Ripey, I.
Kolesnikov, V.
Powiązania:: https://bibliotekanauki.pl/articles/257809.pdf
Data publikacji:: 2007
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: żeliwo manganowe
austenit
odporność na pękanie
zużycie ścierne
produkty zużycia
degradacja wodorowa
manganese cast irons
austenite
crack resistance
wear
wear products
hydrogen degradation
Opis:: Zbadano wpływ dodatków stopowych na strukturę powierzchni i strefy podpowierzchniowej w austenitycznych żeliwach stopowych Fe-Mn-C, modyfikowanych dodatkami Cr, V i Ti w warunkach zużycia przy zmien-nym obciążeniu i niszczenia wodorowego. Wykazano, że dodatki stopowe różnie wpływają na odporność na zużycie i niszczenie wodorowe. W warunkach braku smaru grafit może adsorbować go w ograniczonej ilości i pewne ilości dostarczać na powierzchnię zapobiegając tym samym mikro-zgrzewaniu tych powierzchni i zużyciu katastrofalnemu.
A study was carried out to analyses the influence of alloying elements on the surface and under surface layers structure of Fe-Mn-Cu alloys modified by Cr - V - Ti during the wear under different loading and hydrogen embrittlement. It was shown that alloying elements increases operational properties in the different ways. It was established that an increase of hardness and the change of the structural-phase structure of the investigated alloys in conditions of dry friction at constant loading and high-speed modes can be accompanied by a reduction of the intensity of the wear process that is a transition from pathological modes of the destruction of a material to a normal operating mode wear process.
Źródło:: Problemy Eksploatacji; 2007, 4; 7-16
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Electrolyte coatings of chromium with nanodiamonds on sintered steels
Autorzy:: Gidikova, N.
Valov, R.
Petkov, V.
Salamci, E.
Bilgili, Z.
Unal, R.
Powiązania:: https://bibliotekanauki.pl/articles/391723.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:: sintered products
chromium coating
wear resistance
corrosion resistance
Opis:: Sintered ferrous components were coated with electrochemical chromium coatings modified with nanodiamond particles. The nanodiamond particles were produced by detonation synthesis with an average grain size 8 nm. The objective of this study was to determine the tribological properties and the corrosion resistance of sintered iron samples coated with an electrochemically deposited chromium layer modified with nanodiamond particles. The thickness of the obtained composite coatings was more than 25 μm. The microstructure and microhardness were determined by metallographic methods. The mechanical and chemical properties of the samples were compared to uncoated samples prepared from the same iron powder. The microhardness was 5 times higher, the wear resistance increased 6 times and the corrosion resistance in 0.1 M NaCl solution was 10 times higher.
Źródło:: Prace Instytutu Odlewnictwa; 2017, 57, 4; 333-336
1899-2439
Pojawia się w:: Prace Instytutu Odlewnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Charakterystyka użytkowa i produkcyjna wybranych rozpylaczy płaskostrumieniowych
Working and production characteristics of selected flat fan nozzles
Autorzy:: Czaczyk, Z.
Szulc, T.
Powiązania:: https://bibliotekanauki.pl/articles/336002.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: rozpylacze płaskostrumieniowe
charakterystyka techniczna
środki ochrony roślin
rozpylanie
jakość
zużycie
badania laboratoryjne
flat-stream-oriented sprayers
technical characteristics
plant protection products
atomization
quality
wear
laboratory experimentation
Opis:: Przedstawiono jakość i stabilność pracy wybranych rozpylaczy płaskostrumieniowych, dostępnych w Polsce.
The results of droplet size and working stability for selected flat fan nozzles available in Poland were presented.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2012, 57, 2; 52-59
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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