Microstructure in unbent and as-hot bent segments of thick-walled P92 steel pipe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F15%3AUJP1686A" target="_blank" >RIV/60193247:_____/15:UJP1686A - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/15:00450106

Výsledek na webu

<a href="http://www.scientific.net/KEM.651-653.53" target="_blank" >http://www.scientific.net/KEM.651-653.53</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.651-653.53" target="_blank" >10.4028/www.scientific.net/KEM.651-653.53</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure in unbent and as-hot bent segments of thick-walled P92 steel pipe

Popis výsledku v původním jazyce

"The microstructure of P92 steel pipe processed by hot bending was evaluated in order to characterize the influence of hot bending on microstructure changes in extrados and intrados of bend. The straight pipes, with an outer diameter of 350 mm and wall thickness of 39 mm (Productos Tubulares, s.a.u., Spain), were normalized at 1050°C/60min/air and tempered at 740°C/140min/air. The thick-walled P92 pipe was then hot bended at 920-960 °C using bending rate 7 mm/min. The bends were normalized at 1050°C/60min/air and tempered at 775°C/140min/air after hot bending. The selected specimens, machined from different locations of pipe, were additionally underwent thermal ageing at 650 °C to simulate microstructure degradation typical for long-term service conditions. Microstructure was investigated by scanning electron microscope Tescan Lyra 3 equipped with NordlysNano EBSD detector operating at an accelerating voltage of 20 kV with specimen tilted at 70° and by transmission el. microscope JEM-2100F. Microstructure investigation revealed that different processing history influenced distribution and size of secondary phases and caused changes in interboundary spacing both in the straight pipe and bends. It was found that microstructure changes induced during hot bending and subsequent postbending heat treatment caused deterioration in creep properties of bends in comparison with those of straight pipe."

Název v anglickém jazyce

Microstructure in unbent and as-hot bent segments of thick-walled P92 steel pipe

Popis výsledku anglicky

"The microstructure of P92 steel pipe processed by hot bending was evaluated in order to characterize the influence of hot bending on microstructure changes in extrados and intrados of bend. The straight pipes, with an outer diameter of 350 mm and wall thickness of 39 mm (Productos Tubulares, s.a.u., Spain), were normalized at 1050°C/60min/air and tempered at 740°C/140min/air. The thick-walled P92 pipe was then hot bended at 920-960 °C using bending rate 7 mm/min. The bends were normalized at 1050°C/60min/air and tempered at 775°C/140min/air after hot bending. The selected specimens, machined from different locations of pipe, were additionally underwent thermal ageing at 650 °C to simulate microstructure degradation typical for long-term service conditions. Microstructure was investigated by scanning electron microscope Tescan Lyra 3 equipped with NordlysNano EBSD detector operating at an accelerating voltage of 20 kV with specimen tilted at 70° and by transmission el. microscope JEM-2100F. Microstructure investigation revealed that different processing history influenced distribution and size of secondary phases and caused changes in interboundary spacing both in the straight pipe and bends. It was found that microstructure changes induced during hot bending and subsequent postbending heat treatment caused deterioration in creep properties of bends in comparison with those of straight pipe."

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/TA02010260" target="_blank" >TA02010260: Výzkum materiálových změn nových, progresivních ocelí, používaných na výstavbu a rekonstrukce parovodů energetických a chemických zařízení</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Material Forming ESAFORM 2015

ISBN

978-3-03835-471-0

ISSN

1013-9826

e-ISSN

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Počet stran výsledku

6

Strana od-do

53-58

Název nakladatele

Trans Tech Publications Ltd

Místo vydání

Switzerland

Místo konání akce

Graz, Austria

Datum konání akce

15. 4. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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