MIG varjenje odlitkov in ekstrudiranih profilov iz aluminijeve zlitine

diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo

Rok Turk (Author), Damjan Klobčar (Mentor)

Abstract

Pri varjenju ulitkov imamo izzive, saj prihaja do brizganja zaradi vključkov masti, ujetih plinskih mehurčkov in nečistoč, ki pod vplivom visoke energije tako spremenijo svoj volumen, da jih raznese. Prihaja tudi do poroznosti v zvaru, razpok, oz. slabše trdnosti spoja. Testirali smo varjenje odlitka EN AC-43500-T6 s profilom iz aluminijeve litine EN AW-6005-T6, z dodajnim materialom OK Autrod 4043. Pri aluminijevih zlitinah imamo dodatno težavo pri varjenju, ki nam jo povzroča oksidna plast. V začetku naloge je predstavljena teorija o postopku varjenja in o uporabljenih materialih, v nadaljevanju naloge pa skušamo ugotoviti pravilne parametre, načine varjenja in dejavnike pri varjenju, da bo zvar zagotavljal zadostno trdnost ter funkcionalnost. Varjenje poteka po postopku MIG/MAG s tehnologijo CMT. Pri testih je bil glavni povdarek na vplivu obdelanega zvarnega robu in lege gorilnika. Prišli smo do zakljčka, da je bolje da je obdelan ulitek oziroma oba v primeru, da varimo v dveh zaporednih korakih varjenja.

Keywords

diplomske naloge;MIG/MAG varjenje;aluminijeve zlitine;ulitki;ekstrudirani profili;poroznost;tehnologija CMT;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[R. Turk]
UDC:	621.791:621.767:669.715(043.2)
COBISS:	16910363
Views:	762
Downloads:	262
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	MIG welding of aluminum castings and extruded profiles
Secondary abstract:	In the process of welding castings several technological problems arise. Firstly, there is a problem of spraying, when in the presence of high temperatures small grease particles and impurities change their volume and eventually blow up. Secondly, cracks and porosity in welds can occur. The thesis analyses the welding of aluminium castings EN AC-43500-T6 with an aluminium profile EN AW-6005-T6 using filler material OK Autrod 4043. Welding aluminium itself adds an additional problem, the problem of the oxide layer. In the introductory chapters of the thesis the theory of the welding process and the materials used is presented. This is followed by the subsequent chapters on examining the optimal welding parameters, methods and factors, with the goal of a weld achieving sufficient strength and functionality. Welding uses the MIG/MAG process together with the CMT technology. According to the testimony, the main emphasis was on the influence of welding edge treatment in burner positions. We come to the conclusion that it is better for the cast to be machined with each other, in order to change in two consecutive steps.
Secondary keywords:	thesis;MIG/MAG welding;aluminum alloys;castings;extruded profiles;porosity;technology CMT;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XXII, 66 str.
ID:	11221161