20.500.12556/DKUM-43795 MERILNA NEGOTOVOST TRDOTE JEKLENEGA GRANULATA MEASUREMENT UNCERTAINTY OF STEEL GRANULATE HARDNESS Preučevali smo merilno negotovost trdote jeklenega granulata AMS 230 H in AMS 230 R. Poglavitna razlika med omenjenima granulatoma je vrednost trdote. Jekleni pesek AMS 230 H je v primerjavi z AMS 230 R trši. Merjenje trdote smo izvedli na dveh različnih aparaturah. Ena od aparatur je ročno vodena, medtem ko je upravljanje z drugo skoraj v celoti avtomatizirano. Poskuse smo opravili z Vickersovo metodo, z obremenitvijo s silo 9,807 N. Z analizo rezultatov smo ugotovili, da je merilna negotovost jeklenega granulata AMS 230 R manjša, v primerjavi z merilno negotovostjo granulata AMS 230 H. Na podlagi vseh meritev smo odkrili, da sta obe aparaturi zelo natančni, saj je njuna merilna negotovost primerljiva. We have examed the uncertainty of the hardness of the steel granulate H AMS 230 and AMS 230 R. The main difference between these two granulates is the value of hardness. Steel grit AMS 230 H is harder compared to AMS 230 R. Hardness tests was were performed on two different aparatus. One of the measuring aparatus is operated manualy, while the other one, almost fully automatic. Experiments were performed with Vickers method, with a burden force of 9.807 N. By analyzing the results, we found that the uncertainty of the steel granulate AMS 230 R is smaller in comparison with the granulate AMS 230 H. On the basis of the measurement, we have discovered, that both equipment are very accurate, since their uncertainty is quite comparable. jeklo jekleni pesek toplotna obdelava jekla trdota trdota po Vickersu merilna negotovost steel steel grit steel heat treatment hardness hardness by Vickers measurement uncertainty true true false [J. Urh] Slovenski jezik Angleški jezik Diplomsko delo 2014-03-06 22:29:29 2014-03-28 11:41:15 2022-05-11 03:09:12 2021-04-29 03:26:33 2014 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669.141.23(043.2) 17853206 URN:SI:UM:DK:SJI64YMZ VS_Urh_Janja_2014.pdf VS_Urh_Janja_2014.pdf 1 4049A0E90BCD721EEF6F20FF0E081016 63790aba96e92e875b4d8dcc0335224c384eebf8db3623c799aba6838e5b3389 be60ba46-7c0a-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=62760 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0