Note: Hardening Cast Iron Pulleys

Objective:

Heat cast iron pulleys to 1600ºF(871.1ºC) in order to achieve a hardness of 55 Rockwell C. 

End Product:

cast iron pulleys

Equipment:

Ambrell 7.5 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

Materials:

Ductile Iron Pulleys measuring 3 1/2"(88.9mm) OD and 2" (50.8mm) high.

Temperature:

1600ºF (871.1ºC)

Frequency:

164 kHz

Testing:

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.

Benefits:

  • Increased production

  • Repeatable, non-contact and energy efficient heat

  • Precise heating 

Hardening Cast Iron Pulleys

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