1667 KB18 KB200020242014Amighian, JamshidAnsaripour, AmirZadeh, Hossein Monajatištevilka:3letnik:48str. 367-371COBISSID:1056426ISSN:1580-2949URN:URN:NBN:SI:doc-4AUBG2WYenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeannealinglow-carbon steelmagnetic hysteresismagnetna histerezamaloogljično jekloneporušne preiskavenon-destructive testingžarjenjeEffect of isothermal annealing on the magnetic properties of cold-rolled low-carbon steel with magnetic hysteresis-loop measurements| Vpliv izotermnega žarjenja na magnetne lastnosti hladno valjanega maloogljičnega jekla z meritvami magnetne histerezne zanke|The magnetic properties of ferritic steels including the coercive field and the remanent induction are sensitive to microstructural features such as the grain size and the dislocation density. In this paper the effect of isothermal-annealing treatments at different temperatures on the coercive field and the remanent induction of industrially cold-rolled low-carbon steel samples was investigated. The specimens were annealed at low (500 °C) and high temperatures (640 °C) in order to promote the recovery and recrystallization, respectively. A hysteresis-loop measuring apparatus, specifically designed and assembled for plate samples was used under different annealing conditions. Furthermore, microstructural changes were investigated using light microscopy and hardness measurement and were compared with the data extracted from the device. The result showed that the variation in measured Hc is an appropriate magnetic parameter for following the microstructural evolutions such as recovery and recrystallizationMagnetne lastnosti feritnih jekel, vključno s koercitivnim poljem in remanentno indukcijo, so občutljive za pojave v mikrostrukturi, kot sta velikost zrn in gostota dislokacij. V tem članku je bil preiskovan vpliv obdelave z izotermnim žarjenjem na koercitivno polje in remanentno indukcijo industrijsko hladno valjanih vzorcev maloogljičnega jekla pri različnih temperaturah preiskovanja. Vzorci so bili žarjeni pri nizki (500 °C) in visoki temperaturi (640 °C) z namenom, da bi pospešili popravo in rekristalizacijo. Uporabljena je bila naprava za merjenje histerezne zanke, posebno prirejena za ploščate vzorce v različnih razmerah žarjenja. Spremembe mikrostrukture so bile preiskovane s svetlobnim mikroskopom in izmerjena trdota je bila primerjana s podatki, dobljenimi iz naprave. Rezultati so pokazali, da je spreminjanje izmerjenega Hc pravi magnetni parameter za spremljanje razvoja mikrostrukture, kot sta poprava in rekristalizacijaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije