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master's thesis
Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. urn:nbn:hr:235:019093
Cerovečki, Josip
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Cerovečki, J. (2022). Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:019093

Cerovečki, Josip. "Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:019093

Cerovečki, Josip. "Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:235:019093

Cerovečki, J. (2022). 'Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:235:019093

Cerovečki J. Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2022 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:235:019093

J. Cerovečki, "Sinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:235:019093

Metadata
TitleSinergijski utjecaj nitriranja površine i podmazivanja na smanjenje kinetičkog trenja igličastog ležaja
Title (english)Synergistic effect of surface nitriding and lubrication on reducing kinetic friction of the needle bearing
AuthorJosip Cerovečki
MentorDarko Landek (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2022-07-18, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U teorijskom dijelu rada opisane su konstrukcijske karakteristike igličastih ležaja, hidrodinamičke pojave u njihovom podmazivanju te metode ispitivanja maziva, vibracija, buke i zagrijavanja. U eksperimentalnom dijelu provedeno je nitriranje unutarnjeg ležaja igličastog ležaja izrađenog od čelika EN DIN 100Cr6 postupcima TENIFER i plazma nitriranje. Različitim postupcima nitriranja dobivene su površine sa i bez sloja željeznih nitrida. Nakon nitriranja provedena su ispitivanja hrapavosti površine, tvrdoće površine, te ispitivanje metodom klizanja prizme po prstenu. Metodom klizanja prizme po prstenu ispitani su utjecaji nitriranja površine, brzina vrtnje i dodavanja maziva na pojavu traga trošenja, promjenu kinetičkog trenja i zagrijavanja, te pojavu buke i vibracija. Za provedbu ispitivanja korišteno je suncokretno ulje i sintetičko motorno ulje SAE 5W-30. Iz provedenih ispitivanja utvrđeno je da je do pojave najmanje prosječne širine traga trošenja došlo u uvjetima podmazivanja uljem SAE 5W-30 kod tribopara „PN480 – ležajna bronca“. Do pojave najmanje prosječne vrijednosti faktora trenja došlo je u uvjetima podmazivanja suncokretovim uljem. Pri manjim brzinama kod tribopara „PN480 – ležajna bronca“, a pri većim brzinama kod tribopara „EN DIN 100Cr6 – ležajna bronca“. Analiziranje buke tijekom ispitivanja utvrđeno je da korištenjem podmazivanja dolazi do smanjenja buke i ujednačenijeg rada.
Abstract (english)
The theoretical part of the paper describes the structural characteristics of the needle bearings, hydrodinamic phenomena in their lubrication and methods of testing lubricants, vibrations, noise and temperature changes. In the experimental part, nitriding of the inner ring of the needle bearing made of EN DIN 100Cr6 steel was carried out using TENIFER and plasma nitriding processes. Various nitriding processes were used to obtain the surface with and without the formation of a layer of iron nitrides. After nitriding, tests of surface roughness, surface hardness and block on ring test method were conducted. Using the block on ring method the effects of surface nitriding, speed of the rotation and addition of the lubricant on the appearance of wear marks, changes in kinetic friction and temperature changes with the appearance of noise and vibrations were tested. Sunflower oil and synthetic motor oil SAE 5W-30 were used for the lurication during the tests. From the conducted test s, it was determined that the appearance of the smallest average width of the wear marks occurred under the conditions of lubrication with the SAE 5W-30 oil in the tribopair „PN480 – bearing bronze“. The lowest average value of the friction factor occurred under the conditions of lubrication with the sunflower oil. It occurred at the lower speeds in the tribopair „PN480 – bearing bronze“ and at a higher speed in the tribopair „EN DIN 100Cr6 – bearing bronze“. Analyzing the noise during the tests, it was determined that the use of the lubrication leads to a reduction of noise and uniform operation.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:019093
Study programmeTitle: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems
Course: Materials Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-07-13 19:58:00