prikaz prve stranice dokumenta Analiza mikrostrukture i svojstava ručno kovane mačete
  Download
PDF 6 MB
undergraduate thesis
Analiza mikrostrukture i svojstava ručno kovane mačete
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:314112
Cestar, Andrija
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

Cestar, A. (2023). Analiza mikrostrukture i svojstava ručno kovane mačete (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:314112

Cestar, Andrija. "Analiza mikrostrukture i svojstava ručno kovane mačete." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:314112

Cestar, Andrija. "Analiza mikrostrukture i svojstava ručno kovane mačete." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:314112

Cestar, A. (2023). 'Analiza mikrostrukture i svojstava ručno kovane mačete', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:235:314112

Cestar A. Analiza mikrostrukture i svojstava ručno kovane mačete [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:235:314112

A. Cestar, "Analiza mikrostrukture i svojstava ručno kovane mačete", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:314112

Metadata
TitleAnaliza mikrostrukture i svojstava ručno kovane mačete
Title (english)Analysis of microstructure and properties of a hand-forged machete
AuthorAndrija Cestar
MentorVera Rede (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-03-02, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U završnom radu provedena je karakterizacija materijala ručno kovane mačete koja je uključivala analizu kemijskog sastava, kvalitativnu i kvantitativnu analizu mikrostrukture te mjerenje mikrotvrdoće. U teorijskom dijelu rada opisana je povijest kovanja te neka od najpoznatijih oružja dobivenih kovanjem, kao i podjela postupaka kovanja. U eksperimentalnom dijelu rada detaljno su opisani parametri postupka ručnog kovanja mačete za koju je utvrđeno da je izrađena od čelika oznake 55Cr3. U poprečnom presjeku mačete mikrostruktura se sastoji od bainita i martenzita, a u području oštrice uočena je i mala količina sitnih karbida po granicama kristalnih zrna. Omjer između volumnog udjela martenzita i bainita nije isti na svim dijelovima poprečnog presjeka mačete. Razlike u mikrostrukturi i stupnju ugnječenja odrazile su se na vrijednosti mikrotvrdoće. Najviše vrijednosti mikrotvrdoće izmjerene su u oštrici mačete (460 – 524 HV0,2). Nešto niže vrijednosti mikrotvrdoće izmjerene su u tupom dijelu mačete, a najniže vrijednosti mikrotvrdoće izmjerene su u sredini mačete.
Abstract (english)
In the thesis, the characterization of the material of the hand-forged machete was carried out. The characterization included analysis of the chemical composition, qualitative and quantitative analysis of the microstructure, and measurement of microhardness. The theoretical part of the thesis described the history of forging and some of the most famous weapons made by forging, as well as the distribution of forging procesess. In the experimental part of the thesis, the parameters of the hand-forging process of the machete, which was determined to be made of steel grade 55Cr3, are described in detail. In the cross-section of the machete, the microstructure consists of bainite and martensite. In the area of the blade, a small amount of little carbides was observed at the crystal grain boundaries. The ratio between the volume fraction of martensite and bainite is not the same in all parts of the machete's cross-section. The differences in the microstructure and degree of deformation were reflected in the microhardness values. The highest microhardness values were measured in the machete's blade (460 – 524 HV0.2). Slightly lower microhardness values were measured in the blunt part of the machete and the smallest microhardness values were measured in the middle of the machete.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:314112
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-02-26 15:32:41