Influence of hot bending on microstructure changes of thick-walled P92 steel pipe

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00450292" target="_blank" >RIV/68081723:_____/15:00450292 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Influence of hot bending on microstructure changes of thick-walled P92 steel pipe
Original language description
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 pipe was normalized and tempered. The thick-walledP92 steel pipe was hot bended at 920-960 °C. The bends were normalized and tempered after hot bending. The selected specimens, machined from different locations, were additionally thermal aged at 650 °C for 10 000 h to simulate microstructure degradation. Constant load tensile creep tests of aged state were conducted at 600°C and 140 MPa. Microstructure was investigated by SEM-EBSD. The significant detrimental effect on creep resistance of pipe was found after longterm static annealing due to formationof new phases and microstructure stability. Further, creep behaviour was also significantly influenced by specimen positions. Tensile creep tests showed that hot bending caused deterioration in creep properties of bends in comparison with
Czech name
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Czech description
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Project
<a href="/en/project/TA02010260" target="_blank" >TA02010260: Research of materials changes occurring in modern advanced steels used for construction and reconstruction of pipelines in power and chemical industry</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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