Abstract: The invention relates to a method for producing a mould for casting metallic melts, in particular for casting titanium, titanium alloys or intermetallic titanium aluminides. Said method consists of the following steps: a contact layer is produced by applying a first slicker containing a first metal oxide powder as an essentially solid component to a moulded core, a first sanding layer is produced on the contact layer formed from the first slicker by sanding with a second metal oxide powder and the layer sequence formed from the contact layer and the first sanding layer is radiated with infrared light for a predetermined period of time. According to the invention, for speeding up the drying process, a first dry mass of the first slicker contains a hydraulic binder.

Abstract: The invention concerns a production of precision castings by centrifugal casting, comprising the following steps: a) providing in a crucible (8) a melt of the following composition: Ti45-52 at. %Al45-50 at. %Xl1-3 at. %X22-4 at. %X30-1 at. %/ where Xl=Cr, Mn, V, X2=Nb, Ta, W, Mo, X3=Si, B, C; b) forcing the melt by means of centrifugal forces from the crucible (8) into a mold (4); c) solidifying the melt within the mold thereby creating a casting consisting of a titanium alloy having a lamellar mi-crostructure; and d) reheating the casting for a duration of 60 to 150 hours at a temperature being higher than the eutectic temperature and lower than the alpha-transus temperature of the composition.

Abstract: The invention concerns an apparatus for centrifugal casting under vacuum, said apparatus comprising: a rotor (1) having a shaft (2) extending in an essentially vertical direction therefrom and being rotatable around an axis (A) defined by the shaft (2), the rotor (1) having at least one fixing means for releaseably fixing at least one mold (9) in a first radial distance from the axis (A), and a means for accommodating at least one crucible (6, 7, 23) being associated with the mold (9) so that an outlet opening (8) of the crucible (7, 23) is arranged opposite an inlet opening of the mold (9), the rotor (1) further comprising a gas-tight housing (1, 10) in which the mold (9) and the crucible (7, 23) are accommodated, a vacuum source to create a vacuum in the housing (1, 10), a heating device for melting a metal, the metal being taken up in the gas-tight housing (1, 10) within in the crucible (7, 23), a drive device (13) for driving the shaft (2) in order to rotate the rotor (1), and an auxiliary acceleration d