| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a core for precision casting with improved high-temperature strength, a production method therefor, and a mold for precision casting.SOLUTION: A core for precision casting comprises a coating layer (19a) formed on the surface of a core main body (18a) for precision casting that is sintered using silica particles as the main component thereof, the coating layer composed of silica materials, alumina materials and silica fume. As a result, holes (18c) formed on the surface are sealed. Therefore, core breakage during casting can be prevented.</p> |
