| Abstract | Cilj završnog rada je bio opisati MIG/MAG PMC postupak zavarivanja i ispitati zavar napravljen tim postupkom.
U uvodnom dijelu bilo je riječi ukratko i općenito o zavarivanju, te o povijesti zavarivanja. Kroz teorijski dio su detaljno opisani parametri i procesi koje klasični MIG/MAG postupak uključuje. Nakon opisa klasičnog uslijedio je opis impulsnog MIG/MAG postupka u koji spada MIG-MAG PMC postupak. Kroz opis PMC postupka može se vidjeti koliko je postupak složen, ali i produktivan uz ostvarivanje kvalitetnih rezultata.
U zadnjem dijelu rada dan je cjelovit opis eksperimentalnog dijela ovog završnog rada koji se sastoji od zavarivanja PMC postupkom, izrezivanja presjeka zavarenog dijela, brušenja, te ispitivanja tvrdoće. Brušenjem presjeka zavara dobili smo jasno vidljiv uvid u makrostrukturu. Potom su proučavajući makrostrukturu uočene razlike između zone taljenja, ZUT-a i osnovnog materijala, te izmjerena visina zavara koja je imala vrijednost između 3 i 3,5 mm. Na samom kraju smo Vickersovom metodom mjerili tvrdoću te zaključili da nema značajnih razlika u tvrdoći u zavaru i osnovnom materijalu. |
| Abstract (english) | The aim of the final work was to describe the MIG / MAG PMC welding process and to examine the weld made by this process.
In the introductory part, we talked briefly and in general about welding, and the history of welding. Through the theoretical part, the parameters and processes that the classical MIG / MAG procedure includes are described in detail. The description of the classic process was followed by a description of the pulsed MIG / MAG procedure, which includes the MIG-MAG PMC procedure. Through the description of the PMC procedure, it is possible to see how complex the procedure is, but also productive, while achieving quality results.
In the last part of the paper, a complete description of the experimental part of this final work is given, which consists of PMC welding, cutting the cross section of the welded part, grinding, and hardness testing. By grinding the cross section of the weld, we obtained a clearly visible insight into the macrostructure. Then, studying the macrostructure, differences between the melting zone, zone of heat influence and base material were observed, and the weld height was measured, which had a value between 3 and 3.5 mm. At the very end, we measured the hardness by the Vickers method and concluded that there were no significant differences in the hardness in the weld and the base material. |
