Evaluation of Changes of Mechanical Properties of Selected Cr-Ni-Mo Steels for Heavy Forgings during Long Time Annealing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00312894" target="_blank" >RIV/68407700:21220/17:00312894 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scientific.net/MSF.891.149" target="_blank" >https://www.scientific.net/MSF.891.149</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.891.149" target="_blank" >10.4028/www.scientific.net/MSF.891.149</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of Changes of Mechanical Properties of Selected Cr-Ni-Mo Steels for Heavy Forgings during Long Time Annealing

Popis výsledku v původním jazyce

The effect of long dwell time at elevated temperatures on two types of steels used for production of heavy forgings was evaluated. Microstructural changes and mechanical properties were monitored in temperature interval of 200 - 700 °C in order to avoid the possibility of grain boundary embrittlement during long dwell time at the processing temperature. Samples of the evaluated steels 26NiCrMoV14-5 and 22CrNiMoWV8-8 were being austenitized for 2 hours at temperature of 1200 °C and oil quenched. Subsequently the annealing at selected temperatures for 100 hours was applied. Tensile test, hardness and impact energy measurements were used for the evaluation. The results of mechanical testing, structural and fracture surface analyses indicate that for steels 26NiCrMoV145 and 22CrMoNiWV8-8 there exist a temperature interval of 300 - 400 °C and 500 600 °C respectively showing the toughness decrease.

Název v anglickém jazyce

Evaluation of Changes of Mechanical Properties of Selected Cr-Ni-Mo Steels for Heavy Forgings during Long Time Annealing

Popis výsledku anglicky

The effect of long dwell time at elevated temperatures on two types of steels used for production of heavy forgings was evaluated. Microstructural changes and mechanical properties were monitored in temperature interval of 200 - 700 °C in order to avoid the possibility of grain boundary embrittlement during long dwell time at the processing temperature. Samples of the evaluated steels 26NiCrMoV14-5 and 22CrNiMoWV8-8 were being austenitized for 2 hours at temperature of 1200 °C and oil quenched. Subsequently the annealing at selected temperatures for 100 hours was applied. Tensile test, hardness and impact energy measurements were used for the evaluation. The results of mechanical testing, structural and fracture surface analyses indicate that for steels 26NiCrMoV145 and 22CrMoNiWV8-8 there exist a temperature interval of 300 - 400 °C and 500 600 °C respectively showing the toughness decrease.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1207" target="_blank" >LO1207: Podpora udržitelnosti Inovačního centra diagnostiky a aplikace materiálů na ČVUT-FS v Praze</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Metallography XVI

ISBN

978-3-0357-1018-2

ISSN

0255-5476

e-ISSN

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Počet stran výsledku

6

Strana od-do

149-154

Název nakladatele

Trans Tech Publications

Místo vydání

Curich

Místo konání akce

Stará Lesná, High Tatra Mountains

Datum konání akce

22. 4. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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