20.500.12556/RUL-176874 Izdelava varilnih palic iz zvonovine z gravitacijskim litjem diplomsko delo Manufacturing of welt rods from ball alloy with gravity casting diploma work Diplomsko delo obsega izdelavo varilnih palic iz zvonovine z gravitacijskim litjem. Najprej se je pripravil načrt in se izdelal model s 3D tiskom. Enkratna forma za sam model je bila narejena s postopkom CO2 in je imela horizontalno delilno ravnino. Formo smo zaradi mirnejšega toka taline in manjše možnosti za potek reakcije med talino in formo premazali z grafitnim premazom. Litje smo izvedli iz grafitnega lonca indukcijske peči. V loncu smo stalili krožno litino, ki je bil naš vhodni material. Iz ulitkov smo naredili dva vzorca na začetku in na koncu palice. Na vzorcih so se izvedle 4 analize. Opravila se je simultana termična analiza vzorca in sledila je še rentgenska fluorescenčna analiza. Vzorce pa smo si pogledali še pod optičnim in elektronskim mikroskopom. V vzorcih nam je bila najpomembnejša faza ? (Cu31Sn8), saj zaradi prisotnosti te faze dobimo željene tone pri zvonovih. The thesis focuses on the production of welding rods from bell bronze using gravity casting. In the initial stage, a plan was prepared, and a model was produced by 3D printing. A single-use mold for the model was made using the CO2 process, with a horizontal parting line. To ensure a smoother flow of molten metal and reduce the likelihood of reactions between the melt and the mold, the mold was coated with a graphite layer. The casting was carried out from a graphite crucible in an induction furnace, in which we melted the return material serving as the input raw material. From the castings, two samples were prepared – one at the beginning and one at the end of the rod. Four analyses were performed on these samples: simultaneous thermal analysis, X-ray flurescence analysis, as well as observations under an optical and a scanning electron microscope. In the simples, the δ-phase (Cu31Sn8) was of particular importance, as its presence ensures the desired tones in bells. varilne palice gravitacijsko litje zvonovina δ faza (Cu31Sn8) mikroskopska analiza rods gravity casting bell bronze δ-phase (Cu31Sn8) microscopic analysis true false false M. Praznik Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-12-12 09:00:11 2025-12-12 09:00:19 2025-12-25 03:36:14 0000-00-00 00:00:00 2025 0 Ljubljana 0 Ljubljana XIII, 44 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 110926 261148163 28424.pdf 28424.pdf 1 3150987598E4ED9045F0F08C5D7F9AA6 ab32b4f7d8bbedfe4874f1a558578466013ced5e9f2088269effeddee2815f42 2ed5696e-d730-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=223504 Naravoslovnotehniška fakulteta 0 0 0