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:

  • Precise application of heat

  • Faster process time and production rates

  • Ability to incorporate into existing production lines

  • Repeatable, consistent results 

Surface hardening of steel screws

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