Detail publikačního výsledku

Redistribution of Interstcial Elements in Dissimilar Welds od Creep-Resistant Steels with Increased Nitrogen Content.

ZLÁMAL, B.; FORET, R.; SOPOUŠEK, J.; BURŠÍK, J.

Originální název

Redistribution of Interstcial Elements in Dissimilar Welds od Creep-Resistant Steels with Increased Nitrogen Content.

Anglický název

Redistribution of Interstcial Elements in Dissimilar Welds od Creep-Resistant Steels with Increased Nitrogen Content.

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

The efficiency of conventional fossil power plants strongly depends on steam temperature and pressure. Research and development of heat-resistant steels for high-efficient power plants are being now promoted worldwide in order to reduce emissions of environmentally damaging gases such as CO2. The development of stronger high temperature materials call for not only creep strength improvement but also resistance to fireside and steamside corrosion, fabricability and weldability. Great advancement has been achieved in the analysis of microstructure instability causing a loss of creep strength and the theoretical modelling of precipitation sequences taking place in creep resistant steels welds. The dissimilar laboratory welds of bainitic T25 steel, currently being developed, and modified martensitic chromium P91 steel have been subject of study. Both base materials were ion-nitrided and homogenized at 1050 C/24h before welding. The redistribution of interstitials (C, N) and phase profiles in the weld joints were simulated using DICTRA software package at different annealing conditions of 600 C/240h and 900 C/18h. The results from the simulation were compared with experimental observations. A relatively good agreement between the simulation and the experiments was observed.

Anglický abstrakt

The efficiency of conventional fossil power plants strongly depends on steam temperature and pressure. Research and development of heat-resistant steels for high-efficient power plants are being now promoted worldwide in order to reduce emissions of environmentally damaging gases such as CO2. The development of stronger high temperature materials call for not only creep strength improvement but also resistance to fireside and steamside corrosion, fabricability and weldability. Great advancement has been achieved in the analysis of microstructure instability causing a loss of creep strength and the theoretical modelling of precipitation sequences taking place in creep resistant steels welds. The dissimilar laboratory welds of bainitic T25 steel, currently being developed, and modified martensitic chromium P91 steel have been subject of study. Both base materials were ion-nitrided and homogenized at 1050 C/24h before welding. The redistribution of interstitials (C, N) and phase profiles in the weld joints were simulated using DICTRA software package at different annealing conditions of 600 C/240h and 900 C/18h. The results from the simulation were compared with experimental observations. A relatively good agreement between the simulation and the experiments was observed.

Klíčová slova

creep-resistant steels, structural stability, modelling

Klíčová slova v angličtině

creep-resistant steels, structural stability, modelling

Autoři

ZLÁMAL, B.; FORET, R.; SOPOUŠEK, J.; BURŠÍK, J.

Vydáno

23.05.2006

Nakladatel

TANGER, spol. s r.o., Ostrava

Místo

Ostrava

ISBN

80-86840-18-2

Kniha

METAL 2006, Sborník přednášek

Strany od

107

Strany počet

8

BibTex

@inproceedings{BUT19209,
  author="Bronislav {Zlámal} and Rudolf {Foret} and Jiří {Sopoušek} and Jiří {Buršík}",
  title="Redistribution of Interstcial Elements in Dissimilar Welds od Creep-Resistant Steels with Increased Nitrogen Content.",
  booktitle="METAL 2006, Sborník přednášek",
  year="2006",
  number="1",
  pages="8",
  publisher="TANGER, spol. s r.o., Ostrava",
  address="Ostrava",
  isbn="80-86840-18-2"
}