Induction hardening steel screw threads
Objective
Heat steel roofing screw to 1650 ยบF to harden the threads
Material : Steel roofing screws of varying diameters less than 1.25โ (31.75mm) diameter, 5โ (127mm) long
Temperature: 1650 ยบF (899 ยบC)
Frequency: 291 kHz
Equipment โข DW-UHF-6kW-I handheld induction heating system, equipped with a remote workhead containing two 0.33ยตF capacitors for a total of 0.66ยตF
โข An induction heating coil designed and developed specifically for this application.
Induction Hardening Process
A five turn helical coil is used heat the screw threads. The screw is placed in the coil, heat is applied for 8 seconds to
achieve a 2โ long zone at the required hardness.
Results/Benefits
Induction heating provides:
โข Very rapid heating, faster production rates, efficient
โข Ability to incorporate into existing production lines
โข Repeatable, consistent results
โข Even distribution of heating
