| 摘要 |
PURPOSE: A spray forming device of semi-liquid metal material is provided to manufacture cylinder shaped billet having superior formability by putting a liquid phase sample into tundish and simultaneously spraying molten metal and nitrogen gas onto the liquid phase sample so that fine droplets are laminated on a metal substrate. CONSTITUTION: The spray forming device of semi-liquid material is characterized in that it is formed in such a way that fine metal droplets and nitrogen gas are rotationally sprayed onto a vertically movable mold(13) through melt injection nozzle(11) from the tundish(10) after putting a liquid phase sample molten by induction furnace into tundish(10), wherein flow rate of melt, pressure and flow rate of gas and flow rate ratio of the melt/gas are controlled when spraying the melt droplets and gas from the melt injection nozzle(11), wherein the flow rate of melt is 2 kg/min, and the gas pressure is 6 atmospheric pressure and flow rate thereof is 2.1 m¬3/min respectively, wherein the device comprises tundish(10), melt injection nozzle(11), gas nozzle(12), mold(13) and metal substrate(14), and wherein the melt injection nozzle(11) is inserted into nozzle port(15) having heat resistance through alumina plate(16) and connected to the mold(13).
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