Descrizione del progetto
Componenti delle turbine migliorati grazie ai progressi nelle superleghe per alte temperature
Le superleghe per alte temperature sono costituite da una combinazione di elementi che garantiscono resistenza meccanica, resistenza alla corrosione e stabilità termica eccellenti. Il progetto HiperTURB, finanziato dall’UE, mira a migliorare la saldabilità e la colabilità delle superleghe per alte temperature, riducendo così il peso e i costi di produzione e manutenzione dei componenti delle turbine. I ricercatori combineranno chimica innovativa, solidificazione della colata, trattamento termico e tecniche di saldatura per controllare la granulometria, la formazione delle fasi, la segregazione e le tensioni residue. Saranno sviluppate e valutate con tecniche di simulazione avanzate due nuove colate di superlega dotate di maggiore saldabilità. Le proprietà meccaniche delle superleghe saranno testate a varie temperature. Le attività di HiperTURB contribuiranno alla creazione di componenti più efficienti e affidabili che operano ad alte temperature.
Obiettivo
The objective of HiperTURB is to improve the weldability and castability of high temperature capable superalloy castings. The expected impact will be linked to weight, manufacturing and maintenance cost reduction of TRF components.
This objective will be achieved due to a combination of innovative chemistry adjustments, tailored casting solidification strategies, specific heat treatment and innovative welding techniques to control grain size, phases formation, segregation and residual stresses. Two new superalloy castings with enhanced weldability will be developed. At casting level mould design to control cooling gradient together with the use of inoculants, chillers and shell design will allow to tailor casting solidification. Heat treatment stage will be adjusted in terms of pre and post welding operation sequence (HIP + solution annealing), processing parameters and the introduction of cryogenic heat treatment. Weldability assessment of two new alloy castings will be assessed by standard hot cracking tests and simulated repair and structural welds on simple parts and real geometry-like components. Both TIG and laser based welding processes will be investigated.
Development process will be supported by advanced simulation techniques based on Thermocalc, Dictra, Procast that will enable a more precise approach on final alloy microstructural and castability results. The castability of the alloys will be validated by the design of specific test samples that will be checked to detect casting defects such as shrinkage, hot tearing sensitivity.... Evaluation of internal and external defects will be carried out by non-destructive tests. Mechanical properties of alloys under development such as creep and tensile test at low and high temperature will be performed. Component like geometry cast parts will be manufactured at the end of the project, testing their final properties in terms of castability and weldability.
Campo scientifico
- engineering and technologymechanical engineeringmanufacturing engineering
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- engineering and technologyenvironmental engineeringenergy and fuels
- natural sciencescomputer and information sciencessoftwaresoftware applicationssimulation software
Programma(i)
Meccanismo di finanziamento
CS2-IA - Innovation actionCoordinatore
48200 Durango
Spagna