Casting apparatus for low-melting metals having two or more coating layers
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United States of America Patent
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Sep 26, 1995
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app pub date -
Apr 11, 1994
filing date -
Oct 9, 1991
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Abstract
A casting apparatus for low-melting metals has a coating layer of two-layered structure which hardly reacts with low-melting metals, adheres firmly to the substrate, and protects the substrate from thermal and mechanical shocks for a long period of time. The layer in contact with the substrate contains glass powder having a melting point below 1000.degree. C. and at least one binder selected from silicates and phosphates. The layer in contact with molten metal contains 5-80 wt. % of at least one fluorine compound (as a corrosion resistant material) having a melting point of above 700.degree. C. Owing to the multiple layers, each having a specialized function, the casting apparatus has improved durability over a long period of time.
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