20.500.12556/DKUM-43852 Preiskava zvarnih spojev v podjetju Palfinger d.d. Examination of weld joints in Palfinger d.d. V diplomskem delu smo s porušno preiskavo analizirali zvarne spoje stebra žerjava podjetja Palfinger d.d.. Določili smo zvarne spoje, ki so najbolj obremenjeni, jih izrezali iz zvarjenca in metalografsko pripravili za makroskopsko in mikroskopsko analizo. Na nekaterih vzorcih smo preverjali trdoto. Pri preiskavi zvarnih spojev niso bile najdene kritične napake. Našli smo majhne pore in manjše zlepe. Trdote so sicer nekoliko presegale predpisane vrednosti, vendar še ni bilo kritično. Glavna poglavja v teoretičnem delu diplome so: MAG - varjenje, konstrukcijska jekla, napake zvarnih spojev, postopek metalografske priprave vzorcev, merjenje trdote po Vickersu in mikrostruktura zvara. The aim of this thesis was to analyze the welded joints in pillars of Palfinger’s crane using the destructive testing. The testing revealed the most burdened welded joints, which were cut out of the workpiece and prepared for metallographic macroscopic and microscopic analysis. Some of the samples were also tested for hardness. The analysis of welded joints showed no vital errors, although several minor pores and incomplete fusions were found. The surpassed measured thickness was not critical. Main topics in the theoretical part of the thesis are: MAG – welding, constructional steel, errors of welded joints, metallographic sample preparation, Vickers hardness and microstructure of weld. MAG – varjenje napake zvarnih spojev konstrukcijska jekla metalografska priprava vzorcev trdota po Vickersu mikrostruktura zvara MAG – welding errors of weld joints constructional steel metallographic sample preparation Vickers hardness microstructure of weld true true false [J. Šlamberger] Slovenski jezik Angleški jezik Diplomsko delo 2014-03-14 09:24:30 2014-06-17 09:45:01 2022-05-11 03:09:29 2021-04-30 03:18:15 2014 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.18:621.791.053(043.2) 18051350 URN:SI:UM:DK:WSAKP6Z5 VS_Slamberger_Jernej_2014.pdf VS_Slamberger_Jernej_2014.pdf 1 BD628CB9299C83FE09D0AD87E08C91C1 ed791d81e2004be885b2c723031c919fac896dbf38bae608108651b809dad112 cbe852df-7c0a-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=63275 Fakulteta za strojništvo 0 0 0