Having the minor component present in a larger amount than in the eutecticcomposition of the same components.
过晶的，过低熔的：有大量的小组元，而不是同种组元的共晶组合。
2
Using a co-electroplating process, it was possible to plate the Au–Sn solder directly onto a wafer at or near the eutecticcomposition from a single solution.
Therefore, in thin section castings, for eliminating eutectic carbides and obtaining ferritic matrix, melts treated by re need high carbon content and hypereutectic composition.