| 摘要 |
A method and apparatus for casting wherein molten metal is treated to create conditions of whole volume solidification in the mold. The treating of the molten metal can include the application of vibration in specified manner under specific frequency and amplitude for causing multiple sites of crystallization throughout the mold, or the treating can be by use of activators which are formed during casting, either directly from the molten metal stream by dispersion or from a mineral which concurrently with casting is milled, to a finely ground powder, dehydrated and fed into the molten metal throughout the metal to speed solidification and crystallization at multiple sites. Solidification speed can be more than doubled while eliminating pouring defects and improving the cast metal structure. The methods are applicable to various methods of casting including continuous casting and the methods of vibrating and use of activators can be combined with improved results.
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