Note: Preheat steel for reforming

Objective:

Preheat low carbon steel rivets and handrail bars for reforming for construction

End Product:

Handrail bars

Equipment:

Ambrell 10 kW induction heating system, equipped with a remote workhead containing two 1.5 μF capacitors for a total of 0.75 μF
An induction heating coil designed and developed specifically for this application

Materials:

Low carbon steel rivets 7/16” (11.1mm) dia x 1.5” (38mm) & 1.9” (47mm) long, low carbon bar 1.25” (32mm) dia x 3” (75mm) heat zone

Temperature:

1922 °F (1050 °C)

Frequency:

248 kHz for the rivets 155 kHz for the bars

Testing:

A three-turn encapsulated helical coil is used for the rivets and a four-turn encapsulated helical coil is used for preheating the handrail bars. The rivets are heated to the 1922 °F (1050 °C) in 22-25 seconds and the bars are heated to the 1922 °F (1050 °C) in 4 mins 43 seconds.

Benefits:

  • Controllable heat pattern

  • Ease of on site location use

  • Safe, no open flames

  • Even distribution of heating

Preheat steel for reforming

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