METHOD OF DIRECTED CRYSTALLIZATION OF CASTS IN CASTING GAS TURBINES BLADES AND DEVICE FOR PRODUCING CASTS WITH DIRECTED AND MONOCRYSTALLINE STRUCTURE IN CASTING GAS TURBINES BLADES Russian patent published in 2017 - IPC B22D27/04 

FIELD: foundry.

SUBSTANCE: invention relates to foundry and can be used to produce casts of gas turbines blades from a refractory alloy. Device comprises placed in vacuum casing (2) process chamber (16), which is divided horizontally into a heating zone and a cooling zone by heat-insulating screen (9) mounted on locking ring (14). Ring (14) is built in cylindrical wall (15) at a distance from the base of the wall making 0.25, preferably 0.30–0.55, of its height. Casing (16) in the cooling zone consists of two parts, between which there is annular gas collector (17) equipped with bidirectional gas ejectors (18) located at the distance of at least 40 mm, preferably 45–75 mm, from the lower surface of heat-insulating screen (9). Investment mold 1 with the melt is moved from the heating zone into the cooling zone, where the cast is cooled by a supersonic flow of an inert gas fed into the area of the cast crystallization with the flow rate of 0.5–2 g/sec per nozzle.

EFFECT: provided is optimal conditions to form a directed and monocrystalline structure of metal and to eliminate a cast defects in areas of the cast thickness change.

14 cl, 4 dwg