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undergraduate thesis
UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA
Slavonski Brod: Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, 2020. urn:nbn:hr:153:262696
Ćaleta, Marko
Josip Juraj Strossmayer University of Osijek
Mechanical Engineering Faculty in Slavonski Brod

Institutional repository: Repository of Mechanical Engineering in Slavonski Brod

Cite this document

Ćaleta, M. (2020). UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA (Undergraduate thesis). Slavonski Brod: Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod. Retrieved from https://urn.nsk.hr/urn:nbn:hr:153:262696

Ćaleta, Marko. "UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, 2020. https://urn.nsk.hr/urn:nbn:hr:153:262696

Ćaleta, Marko. "UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, 2020. https://urn.nsk.hr/urn:nbn:hr:153:262696

Ćaleta, M. (2020). 'UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, accessed 28 November 2024, https://urn.nsk.hr/urn:nbn:hr:153:262696

Ćaleta M. UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA [Undergraduate thesis]. Slavonski Brod: Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod; 2020 [cited 2024 November 28] Available at: https://urn.nsk.hr/urn:nbn:hr:153:262696

M. Ćaleta, "UTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, Slavonski Brod, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:153:262696

Metadata
TitleUTJECAJ TEMPERATURE POPUŠTANJA NA TVRDOĆU ZAKALJENOG NELEGIRANOG ČELIKA
Title (english)EFFECT OF TEMPERING TEMPERATURE ON HARDNESS OF QUENCHED UNALLOYED STEEL
AuthorMarko Ćaleta
MentorAndrijana Milinović (mentor)
Committee memberAndrijana Milinović (član povjerenstva)
Committee memberJosip Stojšić (član povjerenstva)
Committee memberIvan Opačak (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Mechanical Engineering Faculty in Slavonski Brod
Slavonski Brod
Defense date and country2020-07-22, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U ovom radu su opisani neki od postupaka toplinske obradbe. Pobliže je opisan postupak poboljšavanja čelika, a u eksperimentalnom dijelu je taj postupak i izvršen na ispitnim uzorcima od čelika C45. Također, opisani su i stadiji popuštanja čelika te utjecaj legirajućih elemenata na proces popuštanja te ponašanje legiranih i nelegiranih čelika pri popuštanju. Zadatak eksperimentalnog dijela je bio dokazati i pojasniti utjecaj temperature popuštanja na tvrdoću zakaljenog nelegiranog čelika. Ispitni uzorci su najprije izrezani i pripremljeni za metalografska ispitivanja. Potom su podvrgnuti zagrijavanju i držanju na temperaturi austenitizacije te kaljeni u vodi. Svakom od tri uzorka je dodijeljena posebna temperatura popuštanja u razmaku od 50°C, te se tako na uzorcima jednakog kemijskog sastava, jednake mikrostrukture te jednakih svojstava mogao ispitati utjecaj temperature popuštanja. Eksperimentalnim je putem utvrđeno kako povišenjem temperature popuštanja opada tvrdoća ispitnih uzoraka, te je nedvosmisleno dokazano kako povišenjem temperature popuštanja se smanjuje tvrdoća zakaljenog nelegiranog čelika.
Abstract (english)
This paper describes some of the heat treatment processes. The processes of quenching and tempering steel are described in more detail, and also in experimental part this procedures were carried out on samples made of C45 steel. Also, the steel tempering stages and the influence of the alloying elements on the process of tempering and the behavior of alloyed and non-alloyed steels are described. The task of the experimental part was to demonstrate and clarify the effect that the tempering temperature has on the hardness of quenched non-alloyed steel. The test samples were firstly cut in suitable shape and prepared for metallographic tests. They are then subjected to warming and holding on the temperature of austenitization, after what they were quenched in water. Each of the three samples was assigned a special temperature, drop at the distance of 50°C, and thus on the samples of the same chemical composition, the same microstructure and the same properties could examine the effect of the tempering temperature. It has been experimentally determined that the increase in the temperature of tempering lead to drop of the hardness of the samples and it is unambiguously demonstrated that increasing of tempering temperature will lower down the value of hardness of quenched unalloyed steel.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:153:262696
Study programmeTitle: Undergraduate Study in 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 conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2020-09-10 12:33:34