Microstructure Influenced by Controlled Rolling, Cooling and Thermal Processing of Seamless Tubes Made of Steel 25CrMo4

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F20%3A10245982" target="_blank" >RIV/61989100:27360/20:10245982 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.405.121" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/DDF.405.121</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/DDF.405.121" target="_blank" >10.4028/www.scientific.net/DDF.405.121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure Influenced by Controlled Rolling, Cooling and Thermal Processing of Seamless Tubes Made of Steel 25CrMo4

Popis výsledku v původním jazyce

By use of physical simulations, it was studied the influence of finish rolling temperature (from 820 oC to 970 oC) on the microstructural and mechanical properties of seamless tubes with a different wall thickness (from 6.3 to 40 mm) - in the state after rolling as well as after quenching and tempering. In laboratory conditions, by use of the Simulator HDS-20, the bloom piercing and rolling of the seamless tubes from 25CrMo4 low-alloy steel in a pilger mill were in a simplified way simulated. The wall thickness of the tube influenced the total deformation of specimens at anisothermal multi-pass plain-strain compression tests as well as the final cooling rate. The quenching and tempering of the deformed specimens was subsequently performed with use of the electric resistance furnaces. The finish rolling temperature had only insignificant effect on the resulting properties. Markedly lower hardness was obtained only after the simulation of tube production with the wall thickness of 40 mm contrary to the wall thickness of 6.3 and 20 mm. Structural variations of the specimens after rolling simulations were more or less overlapped by the subsequent quenching from the temperature of 850 oC and tempering at the temperature of 680 oC.

Název v anglickém jazyce

Microstructure Influenced by Controlled Rolling, Cooling and Thermal Processing of Seamless Tubes Made of Steel 25CrMo4

Popis výsledku anglicky

By use of physical simulations, it was studied the influence of finish rolling temperature (from 820 oC to 970 oC) on the microstructural and mechanical properties of seamless tubes with a different wall thickness (from 6.3 to 40 mm) - in the state after rolling as well as after quenching and tempering. In laboratory conditions, by use of the Simulator HDS-20, the bloom piercing and rolling of the seamless tubes from 25CrMo4 low-alloy steel in a pilger mill were in a simplified way simulated. The wall thickness of the tube influenced the total deformation of specimens at anisothermal multi-pass plain-strain compression tests as well as the final cooling rate. The quenching and tempering of the deformed specimens was subsequently performed with use of the electric resistance furnaces. The finish rolling temperature had only insignificant effect on the resulting properties. Markedly lower hardness was obtained only after the simulation of tube production with the wall thickness of 40 mm contrary to the wall thickness of 6.3 and 20 mm. Structural variations of the specimens after rolling simulations were more or less overlapped by the subsequent quenching from the temperature of 850 oC and tempering at the temperature of 680 oC.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF17_049%2F0008399" target="_blank" >EF17_049/0008399: Rozvoj mezisektorové spolupráce RMTVC s aplikační sférou v oblasti výzkumu progresivních a inovací klasických kovových materiálů a technologií s využitím metod modelování</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Defect and Diffusion Forum. Volume 405

ISBN

978-3-0357-3612-0

ISSN

1012-0386

e-ISSN

1662-9507

Počet stran výsledku

6

Strana od-do

121-126

Název nakladatele

Trans Tech Publications

Místo vydání

Curych

Místo konání akce

Vysoké Tatry

Datum konání akce

24. 4. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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