Usporedba AC MIG i MIG-P postupka pri zavarivanju aluminijskih legura 5083 i 6082

undergraduate thesis

• Title (english): Comparison of AC MIG and MIG-P processes in welding of 5083 and 6082 aluminium alloys
• Author: Martina Kuzek
• 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

Abstract

Tema završnog rada obrađena je teorijski i eksperimentalno. U teorijskom dijelu naglasak je na MIG postupku zavarivanja te dvjema varijacijama postupka na temelju struje i vrste prijenosa metala, a to su AC MIG te DC MIG-P zavarivanje. Objašnjene su glavne značajke svakog te prednosti i mane svakog od njih. Također, kod aluminijskih legura EN AW 5083-H321 i EN AW 6082-T6 obrađen je problem njihove zavarljivosti te dodatnog materijala i plinova koji se koriste tijekom zavarivanja ovih legura. Naposljetku, sukladno zahtjevima norme HRN EN ISO 15614-2, opisan je fenomen pada čvrstoće u području zavarenog spoja. Eksperimentalni dio rada proveden je ispitivanjem tvrdoće metodom Vickers, opterećenjem HV5 na navedenim aluminijskim legurama te je kvantificirana širina područja zone utjecaja topline. Naposljetku, određen je relativni pad čvrstoće u području zavarenog spoja te je predložena primjena AC MIG postupka u izradi aluminijskih zavarenih konstrukcija.

Abstract (english)

The topic of the final paper was treated theoretically and experimentally. In the theoretical
part, the emphasis is on the MIG welding process and two variations of the process based on
current and metal transfer processes that arose from it, AC MIG and DC-MIG-P welding. The
main features of each and the advantages and disadvantages of each are explained. Also, in the
case of aluminum alloys EN AW 5083-H321 and EN AW 6082-T6, the problem of their
weldability and the additional material and gases used during welding of these alloys was
addressed. Finally, in accordance with the requirements of the HRN EN ISO 15614-2 standard,
the phenomenon of strength drop in the area of the welded joint is described.
The experimental part of the work was carried out by testing the hardness using the Vickers
method, with the HV5 load on the mentioned aluminum alloys, and the width of the area of the
heat-affected zone was quantified. Finally, the relative decrease in strength in the area of the
welded joint was determined, and the application of the AC MIG process in the production of
aluminum welded structures was proposed.

• Keywords: AC MIG zavarivanje; MIG-P zavarivanje; aluminijske legure 5083 i 6082; zona utjecaja topline; relativni pad čvrstoće
• Keywords (english): AC MIG welding; MIG-P welding; aluminum alloys 5083 and 6082; heat affected zone; relative strength drop
• Language: croatian
• URN:NBN: urn:nbn:hr:235:229682
• 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: 2026-03-01
• Created on: 2024-02-26 14:50:02