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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Schuler, Monika
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Publications (4/4 displayed)
- 2017Effect of tempering time on the mechanical properties of P91 flux cored wire weld metalcitations
- 2014Creep investigation and simulation of CB2 joints using similar rutile CB2 flux-cored wirecitations
- 2014Properties of a creep resistant 9Cr-1.5Mo-1Co cast steel joint welded with a matching flux-cored wirecitations
- 2014Simulation of microstructure and modelling of mechanical properties of CB2 flux cored wires weld metal
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article
Properties of a creep resistant 9Cr-1.5Mo-1Co cast steel joint welded with a matching flux-cored wire
Abstract
For years, it has been the aim to improve the efficiency of thermal power plants by increasing the steam temperature. Therefore, appropriate steels and welding consumables are needed. Latest developments in cast materials have shown that the boron-alloyed 9Cr-1.5Mo-1Co steel called CB2 enables steam temperatures up to 620 °C. As flux-cored wires for gas metal arc welding offer several technical and economic advantages, they are getting more and more popular. Therefore, a matching flux-cored wire for production welding of cast components has been developed. To obtain the required mechanical properties in weld metal and heat-affected zone, an appropriate welding technology has been established. This paper deals with the influence of welding parameters on the mechanical properties at ambient temperature. Best results could be obtained with higher heat input and lower cooling rate. Additionally, first results of creep tests are presented and show that weld metal and cross-weld samples are within the scatter band of the base material. MatCalc calculations describe the microstructural evolution in the heat-affected zone (HAZ) during welding, post weld heat treatment (PWHT) and service.