Detail publikace
Přesné lití intermetalik gama TiAl
ZEMČÍK, L. Dlouhý A.
Český název
Přesné lití intermetalik gama TiAl
Anglický název
Investment casting of gamma TiAl intermetallics
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
The paper deals with physical and chemical analyses of the evaporation of aluminium from a TiAl melt, with reactions between the melt and the refractories of crucibles, and with reactions between the melt and residual gases in the vacuum furnace chamber. The present study introduces a 1D model of the heat flow in a system composed of a TiAl intermetallic casting, a ceramic shell mould and the vacuum furnace environment. Furthermore, a 1D model of the thermal strain in the casting-mould system during cooling to room temperature is also presented. The parametric study aimed at minimizing thermal stresses provided the optimum initial mould temperatures and cooling kinetics of the system mould-TiAl castings resulted in macroscopically sound castings that were free of macrocracks.
Český abstrakt
Práce obsahuje termodynamickou analýzu reakcí roztavené slitiny TiAl s žárovzdorninami kelímků, keramických forem a s atmosférou vakuové pece. V práci je dále uveden 1D model vedení tepla v soustavě odlitek TiAl – keramická skořepina a na něj navazující 1D model vzniku napjatosti v odlitku. Vytvořené modely umožňují optimalizaci základních licích parametrů (počáteční teplota formy, licí teplota, režim ochlazování odlitků) poskytujících minimální napětí v odlitku během ochlazování.
Anglický abstrakt
The paper deals with physical and chemical analyses of the evaporation of aluminium from a TiAl melt, with reactions between the melt and the refractories of crucibles, and with reactions between the melt and residual gases in the vacuum furnace chamber. The present study introduces a 1D model of the heat flow in a system composed of a TiAl intermetallic casting, a ceramic shell mould and the vacuum furnace environment. Furthermore, a 1D model of the thermal strain in the casting-mould system during cooling to room temperature is also presented. The parametric study aimed at minimizing thermal stresses provided the optimum initial mould temperatures and cooling kinetics of the system mould-TiAl castings resulted in macroscopically sound castings that were free of macrocracks.
Klíčová slova česky
přesné lití, žáruvzdornina
Klíčová slova anglicky
castings, intermetallics
Rok RIV
2005
Vydáno
28.09.2005
Nakladatel
UCEAT Chamber of Metallurgical Engineers
Místo
Ankara
ISBN
975-395-941-9
Kniha
12th International Metallurgy-Materials Congress and Fair
Číslo edice
1
Počet stran
8
BIBTEX
@inproceedings{BUT21369,
author="Ladislav {Zemčík} and Antonín {Dlouhý},
title="Investment casting of gamma TiAl intermetallics",
booktitle="12th International Metallurgy-Materials Congress and Fair",
year="2005",
month="September",
publisher="UCEAT Chamber of Metallurgical Engineers",
address="Ankara",
isbn="975-395-941-9"
}