20.500.12556/RUL-169479 Lasersko pretaljevanje bakra in njegovih zlitin Laser remelting of a copper and copper alloys Namen diplomske naloge je predstaviti različne postopke utrjevanja, s katerimi lahko izboljšamo površinske lastnosti bakra in bakrovih zlitin. Opis postopka laserskega pretaljevanja, pri katerem pride zaradi hitrega strjevanja taline do spremembe v mikrostrukturi. Posledica tega je bolj fina mikrostruktura, ki vpliva na spremembo mehanskih lastnosti v pretaljenem površinskem sloju. V diplomski nalogi smo naredili pregled literature o lastnostih in vrstah bakrovih zlitin, o vrstah laserjev in njihovem delovanju, temeljnih mehanizmih laserskega pretaljevanja in njegovega vpliva na mehanske lastnosti materialov. V okviru naloge smo izdelali vzorce iz bakra in brona obdelane z različnimi parametri laserskega pretaljevanja. Za pretaljevanje smo uporabili Nd:YAG pulzni laser nizkih moči (do 80W). Na koncu smo določili in predstavili vpliv različnih parametrov pretaljevanja na spremembe mehanskih, mikrostrukturnih in korozijskih lastnosti tako obdelanih vzorcev, ter jih med seboj primerjali. The purpose of this thesis is to present various hardening processes that can improve the surface properties of copper and copper alloys. It describes the laser remelting process, in which the rapid solidification of the melt leads to changes in the microstructure, resulting in a finer microstructure that influences the mechanical properties of the remelted surface layer. In the thesis, we reviwed the literature on the properties and types of copper alloys, types of lasers and their operation, the fundamental mechanisms of laser remelting, and its influence on the mechanical properties of materials. As part of the research, we prepared samples of copper and bronze that were treated using different laser remelting parameters. For remelting process, we used a low-power Nd:YAG pulsed laser (up to 80W). Finally, we determined and presented the influence of various remelting parameters on changes in mechanical, microstructural, and corrosion properties of the treated samples, and compared the other. laserji bron baker lasersko pretaljevanje mikrotrdota lasers bronze copper laser remelting microhardness true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-05-30 07:30:07 2025-05-30 07:30:11 2025-06-30 12:02:38 0000-00-00 00:00:00 2025 0 0 XX, 54 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.375.826:544.537:669.35(043.2) 270750 240759043 38983.pdf 38983.pdf 1 2C13AF7B2D81A3FB5C3242A6AB3FD7DC 0e190aeeb492a3eece71c353a53b631beb980053adeddc965355bca5af9f6292 db151f81-3d15-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210890 Fakulteta za strojništvo 0 0 0