Method for production of turbine blades by centrifugal casting

A method for production of a turbine blade by centrifugal casting, the turbine blade having a leading edge portion with a first thickness and a flowing-off edge portion with a second thickness being smaller than the first thickness, comprising the following steps:

• a) providing a centrifugal casting device having a rotor being rotatable around an axis, and at least one crucible being accommodated in the rotor, the crucible having at least one outlet opening,
• b) providing a mold having an extended cavity for forming the turbine blade,
• c) arranging the mold at a radially outward position with respect to the crucible, so that an inlet opening of the mold is arranged vis-a-vis with an outlet opening of the crucible, and further arranging the mold so that a direction from the flowing-off edge to the leading edge of the turbine blade, is directed in a direction against the rotational direction of the rotor,
• d) rotating the rotor and thereby forcing a metal melt by means of centrifugal forces from the crucible into the mold,
• e) exerting a pressure on the melt being forced into the mold until the temperature of the solidifying melt has reached a predetermined cooling-temperature, and
• f) relieving the pressure when the temperature of the solidifying melt is smaller than said predetermined cooling-temperature.