Evolution of sulphides in Cu - Bearing GOES during industrial production process

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of sulphides in Cu - Bearing GOES during industrial production process

Popis výsledku v původním jazyce

Grain oriented electrical steels (GOES) produced by the AlN + Cu technology usually contain ca 0.5 wt. % of Cu. Evolution of microstructure during the final high temperature annealing of GOES is strongly affected by microstructural changes during the individual steps of industrial production process. Inhibition phases, AlN and sulphides, are expected to play an important role in the formation of the final Goss texture. This paper deals with TEM characterization of sulphides in Cu - bearing GOES after basic steps of industrial production process: hot rolling, decarburization annealing (DCA) and high temperature annealing (HTA). In specimens after hot rolling only sulphides of manganese and complex sulphides of manganese containing, a small fraction of copper were identified. Typical size of these sulphides reached several hundreds of nanometres. These results prove a low solvus temperature of Cu rich sulphides in GOES. Re-precipitation of copper-rich sulphides was observed after decarburization annealing. Due to low temperature of precipitation, typical size of these sulphides reached only several tens of nanometres. Apart from complex sulphides of copper and manganese, fine Cu2S particles were detected. In the paper the effect of Cu - bearing sulphides precipitation on the formation of other minor phases is discussed. Heterogeneous nucleation of AlN particles on fine sulphides was often observed. During high temperature annealing all sulphides gradually dissolved.

Název v anglickém jazyce

Evolution of sulphides in Cu - Bearing GOES during industrial production process

Popis výsledku anglicky

Grain oriented electrical steels (GOES) produced by the AlN + Cu technology usually contain ca 0.5 wt. % of Cu. Evolution of microstructure during the final high temperature annealing of GOES is strongly affected by microstructural changes during the individual steps of industrial production process. Inhibition phases, AlN and sulphides, are expected to play an important role in the formation of the final Goss texture. This paper deals with TEM characterization of sulphides in Cu - bearing GOES after basic steps of industrial production process: hot rolling, decarburization annealing (DCA) and high temperature annealing (HTA). In specimens after hot rolling only sulphides of manganese and complex sulphides of manganese containing, a small fraction of copper were identified. Typical size of these sulphides reached several hundreds of nanometres. These results prove a low solvus temperature of Cu rich sulphides in GOES. Re-precipitation of copper-rich sulphides was observed after decarburization annealing. Due to low temperature of precipitation, typical size of these sulphides reached only several tens of nanometres. Apart from complex sulphides of copper and manganese, fine Cu2S particles were detected. In the paper the effect of Cu - bearing sulphides precipitation on the formation of other minor phases is discussed. Heterogeneous nucleation of AlN particles on fine sulphides was often observed. During high temperature annealing all sulphides gradually dissolved.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

586-591

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

25. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391251200093