Analiza mikrostrukture zavarenog spoja čelika S690QL1 načinjenog REL postupkom

master's thesis

• Title (english): Analysis of weld microstructure at S690QL1 steel made by MMAW process
• Author: Mirjam Mijatović
• Mentor: Ivica Garašić (mentor)
• Committee member: Biserka Runje (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

U teorijskom dijelu rada objašnjene su karakteristike poboljšanih sitnoznatih čelika te detaljno analizirana svojstva i zavarljivost čelika S690QL1. Opisane su specifičnosti REL postupka zavarivanja i mogućnosti reparaturnog zavarivanja.
U eksperimentalnom dijelu rada provedeno je reparaturno zavarivanje ploča čelika S690QL1. Detaljno je analizirana mikrostruktura zavara te su provedena razorna i nerazorna ispitivanja zavarenog spoja i simulirane pukotine. Detaljno su analizirani rezultati ispitivanja i doneseni zaključci o ispravnosti odabrane tehnologije zavarivanja te je predložena alternativna tehnologija zavarivanja.

Abstract (english)

The theoretical part of this thesis explains the characteristics of the microalloyed quenched and tempered steels, also detailed characteristics and weldability of the steel S690QL1 are analysed. The characteristics of the MMAW process and the possibility of repair welding are described.
In the experimental part of this thesis, repair welding of the steel plate S690QL1 was carried out. The microstructure of weld was analysed, also destructive and non-destructive testing of weld and simulated cracks were performed. The test results and conclusion reached on the integrity of the chosen welding technology were analysed and alternative welding technology was proposed.

• Keywords: S690QL1; REL; reparaturno zavarivanje
• Keywords (english): S690QL1; MMAW; repair welding
• Language: croatian
• URN:NBN: urn:nbn:hr:235:669602
• Study programme: Title: Mechanical Engineering; specializations in: Design, Process and Energy Engineering, Production Engineering, Engineering Modelling and Computer Simulation, Marine Engineering, Industrial Engineering and Management, Materials Engineering, Mechatronics and Robotics, Autonomous Systems; Course: Production Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-07-06 06:06:07