Hollow spiral stainless steel cooling-water-sprayer was produced by investment casting.Heat mould gravity casting was employed to produce the castings at a high temperature

in which pouring is conducted by first slow then rapid and first small then big flow volume.The defects of sand-slag and gas-hole are absent in the water-cooling-sprayer whose surface is clean and qualified rate is more than 90%.The diameters of pulverization area are more than 1.5m and rate of pulverization is more than 90%

exhibiting excellent pulverized effects.The absence of corrosion of the sprayer can be observed after 2000h salt spray testing

showing excellent wear resistant and corrosion resistant.