20.500.12556/RUL-92520 Optimiranje proizvodnje drogov iz aluminijeve zlitine 6082 visoke kvalitete Optimization of billets production from high-quality aluminum alloy 6082 Aluminijeva zlitina AA 6082 se uporablja za različne namene v gradbeništvu, strojništvu, avtomobilski industriji ipd. Dolgoletne izkušnje uporabe zlitine AA 6082 v komercialne namene so pokazale, da je ta zlitina odporna na vremenske vplive brez zaščitnih prevlek. V proizvodnem procesu izdelave zlitine na kvaliteto končnega izdelka vpliva veliko faktorjev in sicer: delež založenega primarnega in sekundarnega aluminija v talilno peč, obdelava taline, čiščenje taline v peči, udrobnjevanja taline, čiščenja taline izven peči, procesnih parametrov pri litju in pogojev homogenizacije drogov. Primerjali smo meritve in rezultate preiskav iz dveh šarž aluminijeve zlitine AA 6082 pred in po predelavi livnega sistema. Za karakterizacijo preiskovane aluminijeve zlitine AA 6082 visoke kvalitete in doseganje ustrezne mikrostrukture na drogovih premera 228 mm so bile opravljene naslednje meritve in preiskovalne metode: temperaturne meritve, kemijska analiza, termodinamična simulacija faznih ravnotežij (ThermoCalc), diferenčna vrstična kalorimetrija (DSC), optična mikroskopija in elektronska mikroskopija. Ugotovili smo, da je za doseganje ustrezne mikrostrukture po celotni dolžini droga zlitine AA 6082 potrebno zagotoviti višjo temperaturo taline na začetku litja. Namen magistrskega dela je bil izdelava drogov zlitine AA 6082 dolžine 7000 mm z minimalnim izmetom, oziroma znižanje tehnološkega izmeta, kar pomeni boljšo stroškovno učinkovitost in konkurenčnost na trgu. To lahko dosežemo z dodatnimi izolacijskimi pokrovi, ki imajo na spodnji strani električne grelce. The aluminum alloy AA 6082 is used for various purposes in the construction industry, mechanical engineering, automotive industry, etc. Many years of experience in the application of the alloy AA 6082 commercial purposes have shown that this alloy is resistant to weathering without protective coatings. In the production process of manufacturing aluminum alloy AA 6082 on the quality of the final product is influenced by many factors, namely: what is the proportion of stocked primary and secondary aluminum into the melting furnace, what is the treatment of the melt, what is the treatment of the melt in the furnace, modification agent added to the melt, how is the cleaning of the melt outside the furnace, what are the parameters of the casting process and the conditions under which the billets are homogenized. We compared the measurements and the results of investigations of two batches of cast aluminum alloy AA 6082 before and after the remodeling of the casting system. For the characterization of the investigated aluminum alloy AA 6082 of high quality and to achieve appropriate microstructure on billets of 228 mm diameter the following measurements and investigation methods were used: temperature measurement, chemical analysis, thermodynamic simulation of phase equilibria (ThermoCalc), differential scanning calorimetry (DSC) optical microscopy and electron microscopy. We have found that to achieve the appropriate microstructure over the entire length of the rod alloy AA 6082 it is necessary to provide a higher temperature of the melt at the start of the casting. The purpose of the master’s thesis was to casting billets alloy AA 6082 length 7000 mm with minimal ejection, which means better cost efficiency and market competitiveness. This can be achieved by additional insulating covers having the electric heaters at the lower side. zlitina AA 6082 obdelava taline drogovi homogenizacija mikrostruktura AA 6082 melt processing billets homogenization microstructure true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-06-06 07:15:06 2017-06-06 07:15:12 2022-08-09 23:30:23 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 50633 76.pdf 76.pdf 1 31B6E7B0F85E0F63E4303174F699FDD5 ad132957dd6328e84734660003a6d9745470dd3076b3efd847ffc98502e331b7 116a48b1-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/1db84c7d-b0a9-4965-b858-698943604a1b https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=99289 77.pdf 77.pdf 1 66F2147B2891D5EAE974C5E462DB687B 4cb73159a0d1df87226cc8924f1b0ad5b450111edf3697e0472f14632e7561d0 117aff16-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/3f1cb462-39f2-4036-bd3d-3aec0ff9ca6a https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=99290 79.pdf 79.pdf 1 1118ED430CC3E614FF1C089F5BAB27F9 53c7d3b3fba8018827b0944630f73cb39f80787ad8a1f6f8afce8b23c5c29216 119c5db1-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/394871aa-1319-41d8-b36a-5f6fda7e12ec https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=99292 78.pdf 78.pdf 1 3BEE98518684DCC276C3BC914A3DEFE5 565be7a9cda801dc23e9255f48105c016338d7a63342d4a4bae9d410c194c984 11895649-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/ae48a578-5a06-4b63-a54a-c77b5f6294ae https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=99291 Naravoslovnotehniška fakulteta 0 0 0