Turbine blade and method for producing a turbine blade

A method of producing a turbine blade, including a tip region, a root region, a blade-body region, and an inner passage system of individual passages, through which cooling gas can be directed on a flow path inside the turbine blade, and including a throttle device influencing the throughflow of the cooling gas, wherein cooling gas can be directed in the passages from the root region through the blade-body region to the tip region and can be diverted in the opposite direction, and also including outlet openings for discharging the cooling gas from the turbine blade, wherein the outlet openings are arranged on the outflow side of the turbine blade, the method comprising:

• performing a casting operation with a casting mold, including a casting core and an outer casting shell;
• introducing, after the casting operation, a throttle device influencing the throughflow of the cooling gas, wherein the device is introduced in the rear region of the flow path in such a way as to be arranged upstream of the outlet openings and, while the throughflow of the cooling gas is measured, is set up in a lead-through opening brought about by the casting process in such a way that a predetermined value of a throughflow parameter of the cooling gas is achieved;
• and
• fastening the throttle device permanently in the throttling position.