Induction Hardening Pulleys

Objective Heat cast iron pulleys to 1600ºF(871.1ºC) in order to achieve a hardness of 55 Rockwell C.
Material Ductile Iron Pulleys measuring 3 1/2″(88.9mm) OD and 2″ (50.8mm) high.
Temperature 1600ºF (871.1ºC)
Frequency 164 kHz
Equipment • Power of 10 kW induction heating system equipped with a remote workhead containing eight (8) capacitors totaling 0.66 μF
• An induction heating coil designed and developed specifically for this application.
Process A four turn helical coil is used to heat the cast iron pulley for 2 minutes and 45 seconds to reach the required 1600ºF (871.1ºC) Immediately following, the pulley is quenched in an agitated water bath to achieve the desired hardness.
Results/Benefits Induction heating provides:
• Increased production
• Repeatable, non-contact and energy efficient heat
• Precise heating