20.500.12556/RUL-100778 Lasersko varjenje bakra in bakrovih zlitin Laser welding of copper and copper alloys Baker in njegove zlitine so v industriji, predvsem avtomobilski, ene izmed najbolj uporabljenih elementov. Njegovo pomembnost nam pove že dejstvo, da se po njem imenuje obdobje prazgodovine. Izziv pri varjenju bakra (npr. pri varjenju z IR ali zeleno svetlobo) je v tem, da ima visoko reflektivnost, visoko termično prevodnost, ter nizko prevodnost. Zaradi tega ga je izredno težko variti že z laserji, saj baker potrebuje močan vir toplote. V zaključni nalogi smo pregledati najnovejšo znanstveno literaturo na področju varjenja in varivosti bakra in njegovih zlitin. Opisani so vplivi laserske svetlobe na varivost in njeno absorptivnost, vpliv zaščitnih plinov na varivost in metalurške lastnosti zvarnega spoja. Ugotovili smo, da je za varjenje bakra in bakrovih zlitin primerno variti z kombinacijo IR in zelene svetlobe ali preprosto kar z zeleno svetlobo. Najprimernejša svetloba za varjenje bakra je modra, saj z njo dosežemo največjo absorpcijo energije Copper and its alloys are in industry, especially automotive, one of the most used elements. The fact that we have called a period of prehistory after it, points its importance. The problems of copper welding are their high reflectivity, high thermal conductivity, and low absorptivity. This makes it extremely difficult to weld even with lasers, as copper needs a more powerful heat source. The purpose of this research is to review the latest scientific literature on copper. A review of laser light on the weldability of copper and copper alloy is done, as well as the influence of shielding gases on copper welding, and metallurgical effects of the weld is discussed. We found that welding copper and copper alloys is appropriate to be welded with a combination of IR and green light or simply with green light. The most appropriate light for copper welding is blue. It has the highest level of absorptivity. baker varjenje laserji bakrove zlitine absorpcija Nd:YAG IR zelena svetloba modra svetloba zvar reflektivnost copper welding lasers copper alloys absorption Nd:YAG IR green light blue light weld reflectivity true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2018-04-14 07:45:08 2018-04-14 07:45:11 2022-08-14 03:41:55 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 204431 1547.pdf 1547.pdf 1 0F8E295145A6FBC22900C49927607DDB 5d12dba43461c253c2a2628db1c6da7e58a94c77a820c9623fcb3681cd00f6bc 1bb1c999-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110574 1550.tif 1550.tif 1 866B275D68F3C990A6E7B0F0AE1362C5 ea04e0af1e2c2635e17983cf62d9e30dc9e83c17642aec2ad837da0cc0fbd68b 1bf28e90-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110577 1548.tif 1548.tif 1 11B36A6FFA8BF6BB7E490E68DA2FA7BC 6e635ea4b4faa5508e80b8188c844b3ffc92815274e38bdc27f65fecf635df41 1bcc2db6-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110575 1551.tif 1551.tif 1 B5299DFB8DF605FB0B1464ABCDC95B27 5a72cb240c61b883be6f37c37570d06e58cecfa68f01c27c1e8af0e3504fd62c 1c035dec-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110578 1549.tif 1549.tif 1 61B69E6D42B6621D7DC3566760131DBE 5585766a7394eb75c9d1ae488a767a1e6bb69b2fa30bb514d96c8330f079da7e 1bdf3f88-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110576 Fakulteta za strojništvo 0 0 0