Investment Casting
Investment Casting : There are numerous types of investment casting, and the materials include fire clay, silicon dioxide, silica flour, stillimanite, cristobalite, aluminum oxide, zirconium oxide, and others. The Mercast process uses mercury poured into a steel die. A ceramic shell mold is built around the pattern, and then the pattern is frozen. The mercury is subsequently recovered at room temperature. The potential harm from exposure to mercury often is unrecognized
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