Induction Shrink fit steel ring

Objective Heating a steel band to 1000 ºF (538 ºC) and inserting a carbon graphite ring in the center of the steel band
Material 4340 steel ring 8” (20.3cm) OD x 7.75” (19.7cm) ID, .895” (22.7mm) thick, carbon graphite ring insert
Temperature 1000 ºF (538 ºC)
Frequency 32 kHz
Equipment • Power of 45 kW induction heating system, equipped with a remote workhead containing eight capacitors.
• An induction heating coil designed and developed specifically for this application.
Process A four turn, two over two helical coil is used for heating the steel ring. Power is applied for 14 seconds to reach the 1000ºF (538 ºC), the carbon graphite ring is inserted and the assembly is allowed to cool creating a strong joint between the two pieces.
Results/Benefits Induction heating provides:
• A highly effective joint
• Accurate & repeatable heat
• Precise control of cycle times
• Uniform and repeatable results
• Hands-free heating that involves no operator skill for manufacturing

Shrink fit steel ring