B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/185, 22/49
B22D 21/00 (2006.01) B22D 27/04 (2006.01) C30B 11/00 (2006.01)
Patent
CA 1058377
ABSTRACT OF THE DISCLOSURE The present invention provides in a process for manufacturing a casting with a unidirectionally solidified metallic alloy which comprises solidifying an alloy mass, initially in the molten liquid state, in a mould of the required shape, the improvement in which the alloy in the mould is gradually cooled down and in an entire manner; while a unidirectional thermal grad- ient is maintained parallel to a given direction for the alloy mass to set the whole of the alloy in a superfused metastable equilibrium in the form of an homogenous liquid and superfusion equilibrium is upset to cause solidification of the alloy in the form of a material with a dendritic crystallization structure comprising dendrites the main axis of which are parallel to the direction of the thermal gradient. The present invention also provides a device for manufacturing a casting with a unidirection- ally solidified metallic alloy, said device comprising at least one mould located in an enclosure provided with an adjustable heat- ing system and with means to establish within the mould a thermal gradient which is initiated and increases from a section of the mould wall.
247206
Hubert Jean-Claude
Kurz Wilfried
Lux Benno
Mollard Francois
Walt Guido
LandOfFree
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