Název: CHANGES IN ELECTRICAL STEEL SHEETS INDUCED BY HEAT TREATMENT
Autoři: Bulín, Tomáš ; Švábenská, Eva ; Hapla, Miroslav ; Ondrušek, C. ; Schneeweiss, Oldřich
Typ dokumentu: Příspěvky z konference
Konference/Akce: METAL 2017: International Conference on Metallurgy and Materials /26./, Brno (CZ), 20170524
Rok: 2017
Jazyk: eng
Abstrakt: Surface coating of electrical steel sheets is very important due to minimizing eddy current losses in electrical machines. The quality of coating can differ according to the composition. The coating layer has limited heat stability and after crossing of the guaranteed temperature it can be significantly degraded and its insulation properties may change importantly. The aim of this study is to describe changes in parameters of magnetic behavior of the non-oriented Si electrical steel sheet due to degradation of the coating by annealing in air. The parameters were acquired from the measuring of magnetic hysteresis loops on two types of samples with different excitation. The basic information on structure was obtained by optical microscopy. Acquired data are compared between samples with the damaged coating layer by annealing and the original coating layer. The results are discussed from the point of view of the possibility of using sheets with damaged insulation in electrical machines.
Klíčová slova: annealing; degradation; magnetic properties; Surface coating
Číslo projektu: TE02000232 (CEP)
Poskytovatel projektu: GA TA ČR
Zdrojový dokument: METAL 2017: 26TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS, ISBN 978-80-87294-79-6

Instituce: Ústav fyziky materiálů AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0301403

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-407914


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