Annealing of stellite tips on saw blades

Objective

Annealing of the affected zone of a saw blade after the stellite tips have been welded in place 

End Product

Saw blades

Equipment

• Ambrell 2.4 kW induction heating system, equipped with a remote workhead containing two 0.33µF capacitors for a total of 0.66µF

• An induction heating coil designed and developed specifically for this application. 

Materials

C75 carbon steel saw blade with stellite tip 0.06” (1.5mm) thick with a blade height of 0.55” (14mm)

Temperature

1292 ºF (700 ºC)

Frequency

390 kHz

Testing

A split four-turn helical coil is used so the blade can move evenly though the coil. Each tip of the blade is heated for 5 seconds as it passes through the coil to anneal the affected

area. 

Benefits

Induction heating provides:

• Repeatable, rapid and accurate heating cycles which are ideal for in-line production processes because induction can produce

• Hands-free heating that involves no operator skill for manufacturing

• Non contact and energy-efficient heat 

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