Induction Preheating Hot Rod Heading

induction preheating process

Induction Preheating Hot Rod Heading With IGBT Heating Units

Objective Heat a waspaloy rod to 1500ºF (815.5ºC) for hot 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- 20 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 Hot Rod Heading

Induction Hot Plate

High Frequency Induction Hot Plate with a Tin Coating for Flow-Melting 

Objective Heat a carbon steel plate coated with tin to 450 ºF (232 ºC) for flow-melting
Material 7.9” (200mm) x 4.7” (120mm) steel plates with a tin layer of 100 to 1000nm thickness, temperature sensing paint, water for quenching
Temperature 450 ºF (232 ºC)
Frequency 350 kHz
Equipment • DW-UHF-20kW induction heating system, equipped with a remote workhead containing two 0.5μF capacitors for a total of 0.25μF
• An induction heating coil designed and developed specifically for this application.
Process A nine turn “Dog Bone” style coil is used for the flow-melting process. The tin coated carbon steel plate is placed in the coil for 1.34 seconds to uniformly reflow the tin coating. The plate is then quenched in cool water to retain sufficient free tin at the surface.
Results/Benefits Induction heating provides:
• Uniform heating
• Rapid focused heat

high frequency induction heating plate

 

 

 

 

 

 

induction heating steel plate