Induction Hardening steel screw threads or steel nails

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ObjectiveHeat steel roofing screw to 1650 ºF to harden the threadsHardening steel screw threads
Material Steel roofing screws of varying diameters less than 1.25” (31.75mm) diameter, 5” (127mm) long
Temperature:1650 ºF (899 ºC)
Frequency:291 kHz
Equipment
• Power of 6 kW induction heating system, such as UM-05AB-UHF,UM-06AB-UHF, equipped with a remote work head containing two 0.33μF capacitors for a total of 0.66μF
• An induction heating coil designed and developed specifically for this application.
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 2” long zone at the required hardness.
Results/BenefitsInduction heating provides:
• Very rapid heating, faster production rates, efficient
• Ability to incorporate into existing production lines
• Repeatable, consistent results
• Even distribution of heating

PDF: Induction Hardening steel screw threads or steel nails

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