20.500.12556/RUL-127956 Lasersko varjenje poliranih površin Laser welding of polished surfaces V magistrskem delu je zajet pregled znanstvene literature na področju laserskega varjenja, orodnih jekel in varivosti materialov. Predstavljena je problematika reparaturnega varjenja poliranih površin z visokim sijajem na orodjih za brizganje plastike. Opisani so uporabljeni materiali, oprema in metodologija dela. V eksperimentalnem delu smo ugotavljali vpliv parametrov laserskega varjenja na lastnosti navarjenih poliranih površin. Kakovost poliranih površin, ki smo jih navarili z različnimi varilnimi parametri, smo raziskali z vizualno analizo, merjenjem hrapavosti in profila, meritvami trdote in analizo mikrostrukture. Ugotovili smo, da lahko z laserskim varjenjem uspešno reparaturno navarimo polirano površino na orodju za brizganje plastike. The master thesis embraces an overview of scientific literature in the field of laser welding, tool steels and weldability of materials. It presents challenges in repair welding of highly polished surfaces of tools for plastic injection moulding. A description is provided of the materials and the equipment used as well as the thesis methodology. The experimental part deals with the influence of laser welding parameters on the properties of non-welded polished surfaces. By visual analysis, roughness and profile measurement, hardness measurements and microstructural analysis, we conducted a research of the quality of polished surfaces welded within various welding parameters. We discovered that a polished surface of a tool for plastic injection moulding can be successfully remanufactured by laser welding. lasersko varjenje parametri laserskega varjenja orodna jekla varivost polirane površine laser welding laser welding parameters tool steels weldability polished surfaces true false false [T. Debevec] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-06-30 08:30:31 2021-06-30 08:30:33 2022-09-07 04:12:22 0000-00-00 00:00:00 2021 0 Ljubljana 0 XXII, 80 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 621.791.725:669.14(043.2) 228936 71272451 7259.pdf 7259.pdf 1 70FAF5C8AAF5BADF1A0AFD97887E5D0D fce22187e0e383e5835b5bde23d0aee67ec0094f37a9525a8303295de3d39d6a 8d08cdc8-d96c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144572 Fakulteta za strojništvo 0 0 0