Note: Brazing a carbide and steel shank for a plug guage

Objective:

Braze a carbide sleeve to a steel ‘T’ shank 

End Product:

Plug gauge

Equipment:

Ambrell 2 kW induction heating system, equipped with a remote workhead containing two 0.66µF capacitors for a total of 1.32 µF. An induction heating coil designed and developed specifically for this application

Materials:

2.0” (51mm) OD carbide sleeve 1.0” (25.5mm) high braze joint 1.5 ” (38 mm) steel ‘T’ 50% silver braze ring

Temperature:

1292 ºF (700 ºC)

Frequency:

257 kHz

Testing:

A pancake/helical combination coil is used to heat the assembly. The coil design allows easy loading and unloading of the parts without having to rotate them. A few minutes after the start of the heat cycle the heat pattern normalizes and becomes very uniform. For better joint quality a chamfered groove is machined in the steel shank to locate and seat the braze ring. The braze alloy flows into the joint creating a strong, aesthetic bond. The amount of braze alloy heated each cycle is controlled well by the braze ring. 

Benefits:

  • Hands-free brazing which requires no special operator skills for manufacturing

  • Precise, even heat is applied and is divided equally between the shank and the carbide. This provides an even flow of the braze alloy as the parts reach brazing temperatures.

Brazing a carbide and steel shank for a plug guage

Visit our Applications Lab to learn more about free applications testing.
1655 Lyell Ave, Rochester, NY 14606 USA | Tel: +1 585 889 9000