20.500.12556/DKUM-52952 The influence of copper on the decarburization and recrystallization of Fe-Si-Al alloys Vpliv bakra na razogljičenje in rekristaizacijo zlitin Fe-Si-Al The decarburization and recrystallization of Fe-Si-Al alloys containing copper was investigated. The decarburization annealing of non-oriented electrical steel sheets produced from Fe-Si-Al alloys depends on the chemical reactions between the gas mixture and the carbon at the steel's surface. The carbon diffusion, the temperature of decarburization annealing, the composition of the gas mixture and the chemical composition of the steel are the influencing parameters that determine the kinetics and the mechanism of decarburization. The decarburization of Fe-Si-Al alloy with the mass fraction of 0.24% and 0.43% of copper was compared with the decarburization of an Fe-Si-Al alloy with a very small amount of copper (0.01%). The decarburization annealing was performed in a H2-H2O gas mixture at 840 °C. The residual carbon content was determined by analytical chemical method. The alloys were also recrystallized in hydrogen at 980 °C. Microstructure of samples after decarburization and recrystallization annealing was investigated with optical microscopy. Preučevali smo razogljičenje in rekristalizacijo modelnih zlitin Fe-Si-Al z različno vsebnostjo bakra. Razogljičenje neorientiranih elektropločevin, ki jih lahko izdelujemo iz zlitin Fe-Si-Al, je odvisno od kemijskih reakcij med ogljikom, ki difundira na površino jekla, ter plinsko mešanico. Vplivni parametri, ki določajo kinetiko in mehanizem razogljičenja, so: površinska segregacija ogljika, temperatura razogljičevalnega žarjenja, sestava plinske mešanice in kemijska sestava jekla. Razogljičenje smo merili v zlitinah Fe-Si-Al z vsebnostjo masnega deleža bakra 0,24 % in 0,43 % ter ga primerjali s tistim v zlitini z zelo nizko vsebnostjo bakra, 0,01 %. Zlitine smo razogljičili pri temperaturi 840 °C v plinski mešanici H2-H2O. Preostali delež ogljika po razogljičenju smo določili s kemijsko analizo vzorcev. Zlitine smo tudi rekristalizacijsko žarili v suhem vodiku pri 980 °C. Mikrostrukturo vzorcev po žarjenju za razogljičenje in rekristalizacijo smo analizirali s svetlobno mikroskopijo. alloys recrystallization decraburization non-oriented electrical sheet steels copper carbon zlitine rekristalizacija razogljičenje neorientirane elektropločevine baker ogljik true false true Angleški jezik Slovenski jezik Znanstveno delo 2015-07-10 18:43:53 2015-07-10 18:43:53 2022-06-02 03:08:21 2021-05-10 03:30:08 2006 0 0 str. 13-16 št. 1 Letn. 40 2006 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 669.14.018.583:669.3 106193664 10297110 1580-2949 URN:SI:UM:DK:5ULTHV3H Materiali_in_tehnologije_2006_Steiner_Petrovic,_Jenko_metalurginja,_Dolecek_The_influence_of_copper_on_the_decarburization_and_recrystal.pdf Materiali_in_tehnologije_2006_Steiner_Petrovic,_Jenko_metalurginja,_Dolecek_The_influence_of_copper_on_the_decarburization_and_recrystal.pdf 1 0FA2CB719D43792294922E73457704F1 e547e493c333a1eebdea4ac599cc718732df9715ba299922929d8126141793a8 043eab54-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=110128 http://www.dlib.si/details/URN:NBN:SI:DOC-FPOO056K 1 https://dk.um.si/Dokument.php?lang=slv&id=110129 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0