Publication detail
Investment casting technology tailored to near-gamma TiAl alloys
DLOUHÝ, A. DOČEKALOVÁ, K. HOLEC, D. ZEMČÍK, L. MALEC, S.
Czech title
Technologie přesného lití slitin gamma TiAl
English title
Investment casting technology tailored to near-gamma TiAl alloys
Type
conference paper
Language
en
Original abstract
The present study focuses on vacuum induction melting and investment casting of near-gamma TiAl intermetallic alloys. A simple 1D model of the cooling process was formulated and the heat flow as well as stress states in the cast-mould system were numerically solved. Process parameters (melt superheat, initical mould temperature, cooling kinetics and mould composition) were optimized in order to reduce the stress in the casts. The optimized parameters delimited a processing window in which complex-shaped TiAl castings like turbocharger wheels can be fabricated.
Czech abstract
Publikace je zaměřena na přesné lití slitin gamma TiAl tavených ve vakuové indukční peci. V práci je formulován jednoduchý 1D model procesu ochlazování umožňující numericky řešit teplotní a napěťové pole v systému forma-odlitek. Byly optimalizovány parametry procesu (přehřátí taveniny, počáteční teplota formy, kinetika ochlazování a typ keramické skopřepiny). Optimalizované parametry umožnily odlití tvarově složitých odlitků turbínových kol turbodmychadel.
English abstract
The present study focuses on vacuum induction melting and investment casting of near-gamma TiAl intermetallic alloys. A simple 1D model of the cooling process was formulated and the heat flow as well as stress states in the cast-mould system were numerically solved. Process parameters (melt superheat, initical mould temperature, cooling kinetics and mould composition) were optimized in order to reduce the stress in the casts. The optimized parameters delimited a processing window in which complex-shaped TiAl castings like turbocharger wheels can be fabricated.
Keywords in English
Intermetallics, Gamma TiAl, Vacuum Induction Melting, Investment Casting
RIV year
2006
Released
29.05.2006
Publisher
IPM
Location
Bamberg
Book
3rd International Workshop on gamma TiAl Technologies
Edition number
1
Pages from–to
1–23
Pages count
23
BIBTEX
@inproceedings{BUT25027,
author="Antonín {Dlouhý} and Kateřina {Dočekalová} and David {Holec} and Ladislav {Zemčík} and Silvestr {Malec},
title="Investment casting technology tailored to near-gamma TiAl alloys",
booktitle="3rd International Workshop on gamma TiAl Technologies",
year="2006",
month="May",
pages="1--23",
publisher="IPM",
address="Bamberg"
}