Characteristics
– Hardened depth depends on
• Frequency (for induction heating – effects the depth of the
“skin”
– Example 1,000Hz – 4.5-9mm, 1,000,000 Hz – 0.25-0.8mm
• Heat flow (flame)
– Surface Rc 50-60 (martensite or tempered martensite)
– Interior – Rc 10-20 (pearlite-ferrite)