Ispitivanje zavarenih spojeva sukladno normi HRN EN ISO 14555

undergraduate thesis

• Title (english): Testing of weld joints according to standard HRN EN ISO 14555
• Author: Josip Jukić
• Mentor: Ivica Garašić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

U teorijskom dijelu rada opisani su postupci zavarivanja svornjaka s detaljnim uvidom u
postupak elektrolučnog zavarivanja svornjaka s odmakom luka uz primjenu keramičkog prstena
ili zaštitnog plina (postupak 783). Također, detaljno su opisane metode ispitivanja zavarenih
spojeva svornjaka prema zahtjevima norme HRN EN ISO 14555 ovisno o razini kvalitete,
promjeru svornjaka i radnoj temperaturi.
U eksperimentalnom dijelu rada prvotno su postupkom 783 zavarena dva tipa uzoraka
svornjaka koja se sastoje od 12 zavarenih svornjaka promjera Ø22 mm i 12 zavarenih svornjaka
promjera Ø19 mm, te su zatim na njima provedena ispitivanja definirana prema normi HRN
EN ISO 14555 što uključuje vizualni pregled, test savijanja, makroanalizu i test vlačne čvrstoće.
Kriteriji prihvatljivosti dobivenih rezultata ispitivanja definirani su prema normi HRN EN ISO
3834-2, te se daje analiza rezultata i procjena razine kvalitete zavarenih spojeva. Na kraju je
određena prikladnost provedenih ispitivanja za primjenu ovih dvaju tipova zavarenih svornjaka
u radnim uvjetima i za različite načine opterećenja.

Abstract (english)

The teoretical part of this thesis covers stud welding processes with detailed insight in stud arc
welding using ceramic ferrule or shielding gas (process 783). Investigation methods of those
welding joints according to HRN EN ISO 14555 standard in terms of quality levels, stud
diameter and ambient temperature are also described in detail.
In experimental part, two types of samples were welded using process 783. Samples were
consisted of 12 welded studs of diameter Ø22 mm and 12 welded studs of diameter Ø19 mm.
Therefore, they were investigated with visual examination, bend test, macro examination and
tensile test according to HRN EN ISO 14555 standard. Furthermore, acceptance criteria was
defined and analysis of results was carried out as well as evaluation of quality levels of welding
joints according to HRN EN ISO 3834-2 standard. Finally, suitability of experiments done was
defined for use in working ambient for both types of welded studs as well as their use with
different types of stress.

• Keywords: zavarivanje svornjaka; postupak 783; ISO 14555; ISO 3834-2
• Keywords (english): stud welding; process 783; ISO 14555; ISO 3834-2
• Language: croatian
• URN:NBN: urn:nbn:hr:235:707802
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2026-02-28
• Created on: 2024-02-22 13:35:13