Application of modified MAG process in spray arc mode

U teorijskome dijelu rada opisan je MAG postupak zavarivanja i konvencionalni načini prijenosa metala u električnome luku. Osim toga, opisane su modificirane varijante MAG postupka zavarivanja, s posebnim naglaskom na područje štrcajućega luka. Na kraju je detaljno obrađena forceArc varijanta MAG zavarivanja i sve prednosti koje pruža u odnosu na konvencionalno MAG zavarivanje. U eksperimentalnome dijelu rada provedeno je zavarivanje sučeljenoga I – spoja impulsnim MAG načinom prijenosa metala i forceArc puls modificiranom varijantom. Također, izvršeno je zavarivanje forceArc varijantom u uskome žlijebu s većim duljinama slobodnoga kraja žice. Analizom dobivenih rezultata doneseni su zaključci o prikladnosti upotrebe forceArc varijante MAG zavarivanja u odnosu na konvencionalno pri zavarivanju debelostjenih konstrukcija, kao i o mogućnosti upotrebe forceArc varijante kod zavarivanja u uskim žlijebovima s većim duljinama slobodnoga kraja žice.The theoretical part of the thesis deals with MAG welding process and the basic methods of metal transfer. In addition, modified variants of MAG welding procedure are described, with particular regard to modified spray transfer variants. Finally, forceArc MAG welding variant is described, including all the benefits it provides in regards to the conventional MAG welding process. In the experimental part of the thesis, welding of square butt joint was carried out using pulsed MAG welding and forceArc pulse modified variant. Also, narrow groove welding was performed with forceArc modified variant, applying longer wire stickouts. By analyzing the results obtained, conclusions were made on the appropriateness of using forceArc modified variant in relation to conventional MAG welding process for welding of thick – walled components, as well as on the possibility of using forceArc modified variant for narrow groove welding, applying longer wire stickouts