| 摘要 |
A method of manufacturing monocrystalline cast blades of cubic structure comprises effecting a directional solidification. A single grain crystal is selected by means of a selection device 1 at the outlet of which a single grain is to be found, of predetermined orientation and having an direction coincident with the vertical. It is arranged that the axis 12 of each portion 8 will be oriented in a direction of the selected crystal. The blades may be cast in a cluster by making a selected grain grow in a common vertical germination column 6, and the solidification front is made to progress continuously from the vertical column 6 up to the portions to be cast (18, fig 2) and along inclined branches 14 stemming from the germinating column 6. |
