| 摘要 |
A process for transforming a metal alloy (28) having a liquidus temperature and a solidus temperature into a part solid/part liquid shaped body. The metal alloy (28) is poured in the molten state at a temperature (TMo) into a mould (10) having an essentially cylindrical mould wall (12), whereby the mould (10) at the start of filling exhibits a starting temperature that lies below the liquidus temperature, the mould (10) is set into an eccentric rotational movement at a starting temperature for the metal alloy (28) lying above the liquidus temperature and the rotational movement maintained until the metal alloy (28) has cooled to a to a discharging temperature lying between the liquidus temperature and the solidus temperature corresponding to a desired solid/liquid ratio in the shaped body and the shaped body removed from the mould (10) at the discharging temperature. In order to set a desired cooling rate of the metal alloy (28) in the mould (10), the thickness (d1) of the mould wall (12), the material and the starting temperature of the mould (10) are selected such that the change in enthalpy of the metal alloy (28), during cooling from the pouring temperature to the discharging temperature, is smaller than the change in enthalpy for an increase in temperature of the mould (10) from the starting temperature to its final temperature. The setting of the parameters influencing the cooling rate of the mould in combination with the eccentric rotation of the mould lead to an optimal, short duration of the process.
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