Note: Preheating a turbine blade (welding)
Objective:
Heating a turbine blade to 1850 °F (1010 °C) for a welding application
End Product:
Turbine blade
Equipment:
Ambrell EASYHEAT 5060 LI, 4kW 150-400 kHz induction heating system equipped with a remote heat station containing two 1.5 μF capacitors
A single-position one-turn induction heating coil designed and developed specifically for this application
Materials:
Steel turbine blade
Temperature:
1850 °F (1010 °C)
Frequency:
305 kHz
Testing:
The single-position one-turn induction heating coil was designed to heat the tip of the turbine blade. With a 6kW EASYHEAT power supply, the turbine blade was heated to temperature within the targeted time of one minute.
Benefits:
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Speed: The client wanted the part heated to temperature within one minute, which the process achieved
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Precision: The client desired uniform heating across the tip of the blade, which was attained with the proposed process
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Part quality: The end result is a preheating process that allows the part to move quickly to the welding step while meeting all quality requirements
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