20.500.12556/RUL-118606 Zaostale napetosti pri oblikovnem obločnem navarjanju konstrukcijskega jekla G3Si1 Residual stress in WAAM welding of G3Si1 structural steel Cilj dela je bil določiti vpliv procesnih parametrov pri oblikovnem obločnem navarjanju (WAAM) na zaostale napetosti. Z žico iz konstrukcijskega jekla G3Si1 premera 1,2 mm smo navarjali preproste geometrije na osnovni material. Teoretični del zajema opis procesa izdelave WAAM ter mehanizmov nastanka in merjenja zaostalih napetosti. Predstavljen je plan načrtovanja eksperimentov za izdelavo vzorcev s postopkom WAAM ter plan merjenja napetosti z metodo XRD. Rezultate smo analizirali glede na procesne parametre izdelave: jakost varilnega toka, medvarkovno temperaturo in strategijo izdelave. Jakost varilnega toka ima največji vpliv na zaostale napetosti. Strategija navarjanja ima velik vpliv na obliko navarka, saj se lahko zgodi, da nam z napačno strategijo navarjanja ne bo uspeli izdelati izdelka. Najmanjši vpliv na zaostale napetosti ima medvarkovna temperatura. Glede na rezultate eksperimentov priporočamo izmenično strategijo navarjanja s čim manjšim vnosom energije. Master thesis focuses on influence of process parameters in the WAAM manufacturing on residual stress. We welded simple geometry to the base material – structural steel. Samples were manufactured by a MAG welding process using G3Si1 welding wire of 1.2 mm diameter. The theoretical part includes a description of the WAAM manufacturing process and measurement of residual stress. A plan of experiment for production of samples using WAAM and measuring residual stress using X-ray diffraction is presented. The results were analyzed on terms of process parameters: welding current, manufacturing strategy and welding temperature. Welding current has the highest influence on residual stress. The manufacturing strategy has a great influence on the shape of the weld. It can happen that with wrong strategy we will not be able to make a desired product. The smallest effect on residual stress has welding temperature. Based on experiments we recommend alternating strategy with lowest possible welding current. Oblikovno obločno navarjanje (WAAM) dodajalne tehnologije navarjanje zaostale napetosti rentgenska odbojna metoda Wire + Arc Additive Manufacturing (WAAM) additive manufacturing welding residual stress X-Ray Diffraction true false false [S. Veljanovski] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-08-28 08:31:07 2020-08-28 08:31:08 2022-08-30 04:04:43 0000-00-00 00:00:00 2020 0 Ljubljana 0 XXII, 56 str., [2] f. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.75:669.14:620.1(043.2) 222721 28819203 5562.pdf 5562.pdf 1 35DE56CB7517639DDB4FF9EA09E73472 bd2e90e74e6818ac2123f4ef699a84cfdfe09fc0c787374ff00568cebd6979a3 89b0dbd6-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132985 Fakulteta za strojništvo 0 0 0