Preheating Rod for Hot Forming

preheating induction hot forming

Objective : Heat a waspaloy rod to 1500ºF (815.5ºC) for hot forming heading application

Material Waspaloy rod 0.5” (12.7mm)OD, 1.5” (38.1mm) length, ceramic liner

Temperature 1500 ºF (815.5ºC)

Frequency 75 kHz

Equipment • DW-HF-35 kW induction heating system, equipped with a remote workhead containing two 1.32μF capacitors for a total of .66μF
• An induction heating coil designed and developed specifically for this application.

Process A seven turn helical coil is used to heat the rod. The rod is placed inside the coil and power is applied for two seconds providing enough heat to penetrate the inner core. An optical pyrometer is used for close loop temperature control and a ceramic liner is used so the rod does not touch the coil.

Results/Benefits Induction heating provides:
• Low pressure and minimal residual stress
• Better grain flow and microstructure
• Even distribution of heating
• Improved production rates with minimal defects

preheating rod for hot forming