20.500.12556/RUL-103885 Karakterizacija prahov za klasično in aditivno lasersko sintranje Characterization of powders for classic and additive laser sintering Metalurgija prahov je tehnološka panoga, ki se ukvarja z izdelavo izdelkov iz kovinskih prahov. Pri klasičnem načinu izdelave prah stisnemo v želeno obliko končnega izdelka, ki ga nato v peči pri kontrolirani atmosferi sintramo pri dovolj visoki temperaturi, da se delci prahu difuzijsko povežejo skupaj v trdno strukturo Alternativni način izdelave izdelkov iz kovinskih prahov pa je aditivno lasersko sintranje pri katerem laser tali kovinski prah, ki se zato poveže v trdno strukturo. Postopek poteka tako, da dozirni sitem nanaša tanke plasti prahu, ki jih laser vrstično nataljuje, izdelek pa se gradi plast za plastjo. V diplomski nalogi so podane bistvene razlike glede zahtev, ki jih mora imeti prah za uporabo v določeni tehnologiji. V ta namen smo izvedli karakterizacijo treh prahov: EOS StainlessSteel 316L in EOS MaragingSteel MS1, ki sta namenjena za uporabo v tehnologiji laserskega aditivnega sintranja ter prah Högenäs 434 LHC, ki je namenjen za stiskanje in sintranje po klasičnem načinu izdelave. V okviru diplomskega dela smo določili obliko delcev prahov ter opravili meritve nasipnih in stresanih gostot, meritve nasipnih kotov in velikostne porazdelitve. Prahu Höganäs 434LHC smo izmerili tudi tekočnost ter določili zeleno in sintrano gostoto testnih vzorcev. Powder metallurgy is an industry that deals with the manufacture of metal powder products. In conventional manufacturing processes, the powder is pressed into the desired shape of the finished product, which is then sintered at a sufficiently high temperature in a controlled atmosphere, so that the powder particles are diffusely bonded together into a solid structure. An alternative way of producing metal powder products is additive laser sintering, in which a laser melts a metal powder, to form a solid structure. The process is carried out by applying thin layers of powder on top of the previous layer of the sintered powder. In this diploma work we show the significant differences in the main requirements of the powder for use in certain technologies. To this end, three powders have been characterized: EOS StainlessSteel 316L and EOS MaragingSteel MS1, which are intended for use in additive laser sintering and Högenäs 434 LHC powder, which is intended for compressing and sintering according to the classical manufacturing method. In the course of the diploma work, we determined the shape of powder particles and performed measurements of apparent and tap densities, measurement of apparent angles and size distribution. The Höganäs 434LHC powder was also measured for flowability and determined the green and sintered density of the test samples. metalurgija prahov karakterizacija prahov sintranje aditivno lasersko sintranje kovinskih prahov powder metalurgy powder charectarization sintering additive metal laser sintering true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2018-09-28 07:45:34 2018-09-28 07:45:42 2022-08-17 03:42:04 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 65734 1766751 3000.pdf 3000.pdf 1 B9F83746FA760606CD9669221CE804B0 2f83a04bfd5c8f967d3ee2d11f22471e8cc94cd52a2e0cc3566036a7bd2e1529 ed8c000f-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=114388 Naravoslovnotehniška fakulteta 0 0 0