magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
Primož Rojko (Author), Damjan Klobčar (Mentor)

Abstract

Zaradi fizikalnih in kemičnih lastnosti aluminija in aluminijevih zlitin je njihovo varjenje oteženo in omejeno na določene postopke spajanja. Eden izmed bolj primernih postopkov spajanja aluminija in njegovih zlitin je varjenje z gnetenjem. Gre za termo mehanski postopek pri katerem varjenje poteka pri nižjih temperaturah, na zvar pa dodatno vpliva potisna sila, zaradi česar v zvaru dobimo dobre mehanske lastnosti. V nalogi smo raziskali vpliv različnih varilnih parametrov na kakovost zvara. Varili smo po sistemu matrike s podajalnimi hitrostmi 73, 93 in 116 mm/min in vrtljaji 750, 950 in 1180 vrt/min, ter tako dobili 9 vzorcev. Za vsak vzorec smo naredili vizualno analizo, natezni preizkus, analizo trdote, analizo mikrostrukture, analizo temperatur med varjenjem in analizo upogibnega kota. Na podlagi analiz smo ugotovili, da so optimalni parametri za varjenje podajanje 93 mm/min in vrtljaji 950 vrt/min. Pri teh parametrih je faktor ONP 10,2. Pri faktorjih ONP nižjih ali višjih od optimalnega pride do slabše kakovosti zvara, kar je lahko posledica prevelikega vnosa energije v zvar ali slabega mešanja v njem.

Keywords

magistrske naloge;aluminijeva zlitina 2030;varjenje z gnetenjem;mikrostruktura;merjenje temperature;merjenje trdote;natezni testi;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [P. Rojko]
UDC: 669.715:621.791(043.2)
COBISS: 16613147 Link will open in a new window
Views: 866
Downloads: 273
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Friction stir welding of aluminium alloy 2030
Secondary abstract: Because of the physical and chemical properties of aluminum and its alloys, its welding is difficult and limited to certain welding processes. One of the more suitable processes for welding aluminum and its alloys is friction stir welding. It is a thermomechanical process in which welding takes place at lower temperature, and the weld is further influenced by the pushing force what leads to good mechanical properties. In this paper, we studied the influence of different welding parameters on the quality of the weld. We were welding by a matrix system with feed speeds of 73, 93 and 116 mm/min and rotational speed 750, 950 and 1180 rpm, what gave us 9 samples. For each sample we made a visual, tensile strenght, hardness, microstructure, temperature during welding and bend angle analysis. On the basis of the analysis we found that optimal parameters are welding speed 93 mm/min and rotational speed 950 rpm. For this parameters the revolution per feed (RPF) factor was 10.2. For RPF factors lower or higher than optimum, we got lower quality of the weld due to high energy intake or poor mixing within the weld.
Secondary keywords: aluminium alloy 2030;friction stir welding;microstructure;temperature measurements;hardness measurements;tensile tests;
Type (COBISS): Master's thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. Ljubljana, Fak. za strojništvo
Pages: XXIV, 76 str.
ID: 11123136
Recommended works:
, magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo
, zaključna naloga univerzitetnega študijskega programa I. stopnje Strojništvo
, no subtitle data available
, zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program
, no subtitle data available