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master's thesis
Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:103840
Zorić, Kristian
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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Zorić, K. (2023). Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:103840

Zorić, Kristian. "Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:103840

Zorić, Kristian. "Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:103840

Zorić, K. (2023). 'Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 10 July 2024, https://urn.nsk.hr/urn:nbn:hr:235:103840

Zorić K. Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 July 10] Available at: https://urn.nsk.hr/urn:nbn:hr:235:103840

K. Zorić, "Žarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:103840

Metadata
TitleŽarenje za smanjenje zaostalih naprezanja u zavarima čelika S235JR
Title (english)Stress-relief annealing in S235JR steel welds
AuthorKristian Zorić
MentorDarko Landek (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-01-26, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
U radu je opisano elektrolučno zavarivanje pod praškom (EPP) dvije ploče od čelika S235 debljine 120 mm. U teorijskom dijelu rada opisana su svojstva i primjena konstrukcijskog čelika S235, postupak zavarivanja pod praškom, nastanak zaostalih naprezanja u zavaru, te postupci toplinske obrade žarenja za smanjenje zaostalih naprezanja. U eksperimentalnom dijelu rada provođena su žarenja za redukciju zaostalih naprezanja s različitim parametrima žarenja u manjoj i većoj električnoj peći. Utjecaj žarenja praćen je ispitivanjem tvrdoće i mjerenjem zaostalih naprezanja rendgenskom difrakcijom. Provedena su žarenja za smanjenje zaostalih naprezanja u laboratorijskoj električnoj peći i industrijskoj vakuumskoj peći s parametrom žarenja P = 17,16. Žarenja u laboratorijskoj peći nisu popustila zaostala naprezanja zbog nejednoličnog zagrijavanja i ohlađivanja presjeka uzorka. Žarenje uzorka u industrijskoj vakuumskoj peći na 560 °C/4 h smanjila su zaostala naprezanja na cijelom presjeku na vrijednosti između -20 MPa do -50 MPa.
Abstract (english)
This paper describes submerged arc welding (SAW) of two S235 steel plates with a thickness of 120 mm. In the theoretical part of the paper, the properties and application of structural steel S235, the submerged arc welding process, the generation of residual stresses in the weld and the annealing heat treatment procedures to reduce residual stresses are described. In the experimental part of the paper, annealing was performed to reduce residual stresses with different annealing parameters in a smaller and larger electric furnace. The influence of annealing was detected by hardness testing and measurement of residual stresses by X-ray diffraction. Annealings were carried out to reduce residual stresses in a laboratory electric furnace and an industrial vacuum furnace with the annealing parameter P = 17,16. Annealings in the laboratory furnace did not relieve residual stresses due to non-uniform heating and cooling of the sample cross-section. Annealing the sample in an industrial vacuum furnace at 560 °C / 4 h reduced the residual stresses on the entire section to values between -20 MPa and -50 MPa.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:103840
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 Attribution 3.0 Unported (CC BY 3.0) icon
Created on2023-01-18 15:55:29