METHOD OF PRODUCING MONOCRYSTALLINE CASTINGS Russian patent published in 1994 - IPC

FIELD: metallurgy. SUBSTANCE: method includes heating of mold with seed, arrangement of them in the temperature field constant in height in the range of temperatures higher than the liquidus temperature of temperature-resistant alloy, but not lower than the liquidus temperature of the alloy of the seed, filling of the mold with the melt and movement of the mold first at a speed of 20-1000 mm/min within the zone of the constant and partly-variable thermal fields to the position of the seed not lower than the lever of the liquidus isotherm of the heat-resistant alloy. The subsequent movement and immersion into liquid-metal cooler is performed at a speed ensuring the position of the crystallization front above the level of the cooler. EFFECT: 90 % ingot-to-product yield in terms of structure, decrease in working temperatures of heaters by 100-160 C, 3-5-fold increase in service life of heaters, screens and temperature monitoring systems, 30 % decrease in consumed power of heaters, higher operating reliability of ceramic molds and cores. 1 dwg, 1 tbl