Induction Heat SettingĀ A Shape Memory Alloy With IGBT Induction Heater
Objective Heat a steel die to 975Ā°F (523.8ĀŗC) to set (cure) a shapeĀ memory alloy in the correct position.
Material Nitinol wire, 2ā (50.8mm) diameter tapered steel die, steel tubeĀ to house the die, instant adhesive
Temperature 975Ā°F(523.8ĀŗC)
Frequency 131kHz
Equipment ā¢ DW-UHF-6kW induction heating system equipped with aĀ remote workhead containing one 1.0 Ī¼F capacitor
ā¢ An induction heating coil designed and developedĀ specifically for this application.
Process A five turn helical coil is used to heat the steel die. The NitinolĀ wire is set into the die and tacked into place using instantĀ adhesive. The die is placed inside a larger steel tube. The dieĀ cure is heated to 945ĀŗF (507.2ĀŗC) in 75 seconds. SuccessfulĀ heat setting of the Nitinol wire is achieved in 15 seconds.
Results/Benefits Induction heating provides:
ā¢ Fast, accurate, repeatable heating
ā¢ Heat precisely delivered only to where it is needed
