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master's thesis
Karakterizacija materijala tribološki oštećenog zupčanika
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. urn:nbn:hr:235:252997
Ljubek, Mihaela
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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

Cite this document

Ljubek, M. (2021). Karakterizacija materijala tribološki oštećenog zupčanika (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:252997

Ljubek, Mihaela. "Karakterizacija materijala tribološki oštećenog zupčanika." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:252997

Ljubek, Mihaela. "Karakterizacija materijala tribološki oštećenog zupčanika." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:235:252997

Ljubek, M. (2021). 'Karakterizacija materijala tribološki oštećenog zupčanika', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 24 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:252997

Ljubek M. Karakterizacija materijala tribološki oštećenog zupčanika [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2021 [cited 2024 December 24] Available at: https://urn.nsk.hr/urn:nbn:hr:235:252997

M. Ljubek, "Karakterizacija materijala tribološki oštećenog zupčanika", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:235:252997

Metadata
TitleKarakterizacija materijala tribološki oštećenog zupčanika
Title (english)Materials characterization of tribological damaged gear
AuthorMihaela Ljubek
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2021-07-14, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Cilj ovog rada bio je utvrditi uzrok prebrzog tribološkog oštećivanja zupčanika izuzetog iz stroja za proizvodnju vreća za pakiranje cementa. U teorijskom dijelu rada opisani su zupčanici i glavni uzroci njihova dotrajavanja. Navedeni su i opisani čelici koji se najčešće koriste za izradu zupčanika i toplinske obrade koje se primjenjuju za postizanje optimalnih svojstava. U eksperimentalnom dijelu rada provedena je analiza kemijskog sastava, analiza mikrostrukture i mjerenje mikrotvrdoće oštećenog zupčanika. Zupčanik je izrađen od ugljičnog čelika s masenim udjelom ugljika od ≈ 0,5 %. Mikrostruktura čelika sastoji se od ferita (56 %) i perlita (44 %), a ista je na ruba zuba i u jezgri zupčanika. Mikrotvrdoća uz površinu bokova zubi je relativno niska i iznosi 228 HV0,1, a mikrotvrdoća u jezgri je još niža i iznosi 144 HV0,1. Prema svemu navedenom uzrok preranog trošenja bokova zubi analiziranog zupčanika je izostanak odgovarajuće toplinske obrade koja bi dovoljno povisila tvrdoću i otpornost na trošenje.
Abstract (english)
The aim of this work was to determine the cause of too fast tribological damage of gears excluded from the machine for the production of cement packing bags. The theoretical part of the paper describes the gears and the main causes of their wear. The steels most commonly used for gear fabrication and heat treatment that are applied to achieve optimal properties are listed and described. In the experimental part of the work, the analysis of chemical composition, analysis of the microstructure and measurement of microhardness of the damaged gear were performed. The gear is made of carbon steel with a carbon content of ≈ 0.5%. The microstructure of steel consists of ferrite (56%) and perlite (44%) and it is the same at the tooth edge and in the gear core. The microhardness along the surface of the flanks of the teeth is relatively low and amounts to 228 HV0.1, and the microhardness in the core is even lower and amounts to 144 HV0.1. According to all the above, the cause of premature wear of the flanks of the teeth of the analyzed gear is the lack of appropriate heat treatment that would sufficiently increase the hardness and wear resistance.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:252997
Study programmeTitle: Mechanical 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 on2021-07-13 15:52:16