Induction Brazing steel orthodontic parts

Objective To heat a batch of orthodontic parts to 1300°F (704°C) within 1 second in an inert atmosphere for brazing.
Material Small stainless steel orthodontic parts, silver braze alloy, no flux, 3 1/ 8” (79.3mm) graphite susceptor disk with 1” (25.4) center hole and bell jar made of pyrex or quartz
Temperature 1300°F (704°C)
Frequency 165kHz
Equipment Power of 6KW induction heating system and 0.5 microfarad heat station
Process A four turn helical coil is used to heat parts. Brazing paste is applied to orthodontic parts with a syringe. The parts are placed on the graphite susceptor disk, which is placed on an insulating support in a quartz bell jar. After the jar is filled with inert gas, RF power is applied for 50 seconds at 165kHz to reach the required temperature, followed by a cool-down cycle.
Results/Benefits Induction heating provides:
• Fast, accurate, repeatable heat
• Ability to heat very small areas within precise production tolerances
• Better joint quality, reduced oxidation
• Increased production rates and reduced labor costs (100 parts are brazed in 50 seconds)