Influencing of transformation kinetic of 25CrMo4 steel by the thermomechanical parameters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F18%3A10240973" target="_blank" >RIV/61989100:27360/18:10240973 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influencing of transformation kinetic of 25CrMo4 steel by the thermomechanical parameters

Popis výsledku v původním jazyce

The aim of the contribution is creation of transformation diagrams of hypoeutectoid 25CrMo4 steel that is used for tube production for the OCTG (Oil Country Tubular Goods) industry. For a comparison purpose, the CCT diagrams with and even without influence of previous deformation were assembled. In addition, the DCCT diagram (i.e. with previous deformation influence) was exposed to different austenitization conditions. The transformation diagrams were assembled on the basis of dilatometric tests which were confronted with the metallographic analysis and hardness measurement. Due to the influence of previous deformation and different austenitization conditions, peremptory movements of curves in the assembled transformation diagrams were occurred, which, of course, was reflected also on the structure and hardness, respectively. After the previous deformation, the structures of samples had considerably increased share of quenching phases, including of share of acicular ferrite. This, of course, was manifested by increased values of hardness.

Název v anglickém jazyce

Influencing of transformation kinetic of 25CrMo4 steel by the thermomechanical parameters

Popis výsledku anglicky

The aim of the contribution is creation of transformation diagrams of hypoeutectoid 25CrMo4 steel that is used for tube production for the OCTG (Oil Country Tubular Goods) industry. For a comparison purpose, the CCT diagrams with and even without influence of previous deformation were assembled. In addition, the DCCT diagram (i.e. with previous deformation influence) was exposed to different austenitization conditions. The transformation diagrams were assembled on the basis of dilatometric tests which were confronted with the metallographic analysis and hardness measurement. Due to the influence of previous deformation and different austenitization conditions, peremptory movements of curves in the assembled transformation diagrams were occurred, which, of course, was reflected also on the structure and hardness, respectively. After the previous deformation, the structures of samples had considerably increased share of quenching phases, including of share of acicular ferrite. This, of course, was manifested by increased values of hardness.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FV10253" target="_blank" >FV10253: Výzkum a vývoj progresivních mikrolegovaných materiálů pro teplotně řízené válcování a ochlazování s následným zušlechtěním bezešvých trub pro použití v oblasti OCTG a strojním průmyslu</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

METAL 2018 : conference proceedings : reviewed version : 27th International Conference on Metallurgy and Materials : May 23rd-25th 2018, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

236-241

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

23. 5. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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