MIG welding of Titanium

Cilj ovog diplomskog rada je odrediti utjecaj unosa topline na svojstva i izgled kutnog zavara od materijala titanija. U teorijskom dijelu rada iznesene su karakteristike titanija i njegovih legura kao karakteristike zavarljivosti pojedinih faza legura. Opisan je ukratko MIG postupak kojim su izrađeni zavari, kao i dinamička karakteristika prijenosa metala. U eksperimentalnome dijelu rada provedeno je zavarivanje kutnog spoja impulsnim MIG načinom prijenosa metala. Također, izvršeno je izrada makroizbruska i ispitivanje tvrdoće. Analizom dobivenih rezultata doneseni su zaključci o MIG zavarivanju titanija s obzirom na unesenu toplinu, penetraciji zavara i zaštitnoj atmosferi.The aim of this thesis is to determine the influence of heat input on the properties and appearance of angular weld made of titanium material. In the theoretical part of the paper, the characteristics of titanium and its alloys are presented as the weldability characteristics of individual phases of alloys. The MIG process by which welds are made is briefly described, as well as the dynamic characteristic of metal transfer. In the experimental part of the work, the welding of the butt joint by pulsed-spray MIG method of metal transfer was performed. Also, macroetching and hardness testing were performed. By analyzing the obtained results, conclusions were made about MIG welding of titanium with regard to the heat input, weld penetration and protective atmosphere