The influence of welding parameters in MAG welding of quench and tempering steel

Abstract

U ovom diplomskom radu detaljno je opisan MAG postupak zavarivanja, svi dijelovi uređaja za MAG zavarivanje te način na koji utječu na proces zavarivanja. Također su opisani i plinovi i zaštitni praškovi te njihova funkcija kod zavarivanja. Opisani su i čelici za poboljšavanje i način na koji se provodi poboljšavanje takvih čelika nakon zavarivanja. Detaljno su opisani načini automatizacije MAG postupka zavarivanja, a fokus je stavljen na automate za zavarivanje na kojima se provodio eksperimentalni dio diplomskog rada. U eksperimentalnom dijelu diplomskog rada koristio se automat za zavarivanje Promo Tech Rail Bull uparen s Fronius uređajem za zavarivanje. Cilj eksperimenta bio je prikazati ovisnost jačine struje (s ostalim parametrima konstantnim) o izgledu, odnosno dimenzijama zavarenog spoja. Zavarivanje se provodilo MAG postupkom, a položaj zavarivanja bio je kutni PB položaj.This thesis describes MAG welding process in detail, all parts of MAG welders and the way they affect the welding process. Gases and flux cores and their function in welding are also described. Quench and tempered steels are also described, as well as the way in which quenching and tempering after welding is carried out. Methods of automating the MAG welding process are described in detail, and the focus is placed on welding track carriage on which the experimental part was carried out. In the experimental part of the thesis, a Promo Tech Rail Bull welding carriage was paired with a Fronius welder. The goal of the experiment was to show the dependence of current strength (all other parameters were constant) on the appearance and dimensions of the welded joint. Welding was carried out using the MAG process, and the weld type was fillet weld in PB welding position