| 20090314451 | PROCESS FOR MANUFACTURING DIRECTIONALLY SOLIDIFIED BLADES - The present invention relates to a process for manufacturing a single-crystal turbomachine nozzle guide vane comprising an airfoil between two platforms, by pouring molten metal into a shell mold followed by directional solidification, the front of which advances vertically upward, from a single crystal provided by a single-crystal grain provider device placed in the lower portion of the mold and having a predetermined orientation, the [001] direction coinciding with the vertical, the volumes of the mold forming the platforms being oriented in a plane parallel to the [001] direction of said single crystal and the volume of the mold forming the airfoil comprising a lower edge, the device providing the single-crystal grain emerging in a grain duct forming a connection between said device and the lower ends of the platforms, the grain duct being shaped so as to comprise two branches for feeding the platforms and a web-shaped volume extending between said feed branches, the platforms and the lower edge of the airfoil, wherein the upper edge of the volume forming the airfoil is inclined to the horizontal direction. | 12-24-2009 |
