Note: Surface hardening of steel screws
Objective:
Rapid surface hardening of steel screws
End Product:
Steel screws
Equipment:
Ambrell 10 kW induction heating system, equipped with a remote workhead containing two 0.3μF capacitors for a total of 0.17μF An induction heating coil designed and developed specifically for this application.
Materials:
Steel screws .25” (6.3mm) diameter
Temperature:
932 ºF (500 ºC)
Frequency:
344 kHz
Testing:
A three-turn channel coil is used to heat 9 screws at a time. Power is applied for 3 seconds to reach 932 ºF (500 ºC) and achieve the required hardness. The screws travel through the coil head down in an automated system at a rate of 200 screws per minute
Benefits:
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Precise application of heat
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Faster process time and production rates
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Ability to incorporate into existing production lines
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Repeatable, consistent results

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