Abstract
This study is investigated the possibility of removing investments after casting or oxidation films produced on the cast alloy using a compact water-jet device. This device has a nozzle of 0.17 mm in diameter and can inject high-pressure water (50-2,000 kgf/cm2) during the mobile sample stage at a rate of 0-25 mm/min. High-pressure water was injected to two investments and four cast alloys after casting to remove investments and oxidation films, and then the width and depth of the flutes were measured. The flute of investments was deeply cut by enlarging the water pressure rather than the stage speed. When the sample stage moves at 8.7 mm/min, a water pressure of 700 kgf/cm2 is suitable for the removal of oxidation films on the cast alloy. As a result, it was found that water jet device could be used for the removal of investments and oxidation films on cast alloy.
