Creep resistance and microstructure evolution in similar weld joints made of HR3C steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F18%3AN0000006" target="_blank" >RIV/25870807:_____/18:N0000006 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/26722445:_____/18:N0000072

Výsledek na webu

<a href="https://www.metalconference.eu/cz/sbornik-metal-2018/" target="_blank" >https://www.metalconference.eu/cz/sbornik-metal-2018/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Creep resistance and microstructure evolution in similar weld joints made of HR3C steel

Popis výsledku v původním jazyce

Modern blocks of fossil fuel power plants designed for steam temperatures above 600 °C require advanced stainless steels in superheater or reheater systems. Great attention is paid to the exploitation of new steel grades with higher material properties. In the area of austenitic steels, the perspective grade is undoubtedly HR3C steel (X6CrNiNbN 25-20). In terms of the use of similar weld joints made of HR3C steel in fossil fuel power plants, detailed knowledge on creep resistance and microstructural stability of these weld joints is necessary. Similar weld joints made of HR3C steel tubes were manufactured using a combination of GTAW and SMAW welding technologies. Weld joints were studied in both the as-welded state (PW), and after post-weld heat treatment (PWHT) at 1230 °C for 15 minutes. The paper presents the results of creep rupture tests on cross-weld samples tested at 650 and 700 °C. Metallographic analysis was performed on longitudinal sections of creep ruptured samples and microhardness HV 0.5 profiles over cross-weld samples were determined. The paper analyses the preferential rupture locations of the HR3C similar weld joints in dependence on the temperature of creep exposure and applied stress.

Název v anglickém jazyce

Creep resistance and microstructure evolution in similar weld joints made of HR3C steel

Popis výsledku anglicky

Modern blocks of fossil fuel power plants designed for steam temperatures above 600 °C require advanced stainless steels in superheater or reheater systems. Great attention is paid to the exploitation of new steel grades with higher material properties. In the area of austenitic steels, the perspective grade is undoubtedly HR3C steel (X6CrNiNbN 25-20). In terms of the use of similar weld joints made of HR3C steel in fossil fuel power plants, detailed knowledge on creep resistance and microstructural stability of these weld joints is necessary. Similar weld joints made of HR3C steel tubes were manufactured using a combination of GTAW and SMAW welding technologies. Weld joints were studied in both the as-welded state (PW), and after post-weld heat treatment (PWHT) at 1230 °C for 15 minutes. The paper presents the results of creep rupture tests on cross-weld samples tested at 650 and 700 °C. Metallographic analysis was performed on longitudinal sections of creep ruptured samples and microhardness HV 0.5 profiles over cross-weld samples were determined. The paper analyses the preferential rupture locations of the HR3C similar weld joints in dependence on the temperature of creep exposure and applied stress.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

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)

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

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

749-754

Název nakladatele

Tanger Ltd., Ostrava

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

000461832200131