Uticaj aktivnog premaza na dubinu uvara pri zavarivanju nerđajućeg čelika netopljivom elektrodom u zaštiti inertnog gasa
Influence of activated flux on the penetration depth in non-consumable electrode welding of strainless steel in inert gas shielding
Abstract
U disertaciji je prikazan odabir rastvarača, veličine, vrste i udela čestica za aktivni premaz namenjen postizanju povećane dubine uvara na austenitnom nerđajućem čeliku pri zavarivanju netopljivom elektrodom u zaštiti inertnog gasa. Pored sastava aktivnog premaza, u disertaciji je izvršena optimizacija: geometrije elektrode, jačine struje i brzine zavarivanja. Nakon odabira perspektivnih tipova sastava premaza i parametara zavarivanja, na zavarenim uzorcima izvršena je karakterizacija mehaničkih osobina, hemijskog sastava i mikrostrukture.
In this doctoral thesis, the selection of solvent, size, type and the content of oxide particles in activated flux aimed at increasing the penetration on austenitic stainless steel in gas tungsten arc welding is presented. Besides activated flux composition, the optimization of welding parameters such as electrode geometry, welding current and welding speed was done. After the selection of successful activated flux formulations and welding parameters, the characterization of mechanical properties, chemical composition and microstructure was determined.