Induction Brazing Carbide to Steelย
Objective: Braze a carbide sleeve to a steel ‘T’ shank
Material :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 ยบF (700 ยบC)
Frequency: 257 kHz
Equipment
โข DW-UHF-6KW-I induction heating system, equipped with a remote workhead containing two 0.66ฮผF capacitors for a total of 1.32 ฮผF.
โข An induction heating coil designed and developed specifically for this application.
Process 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.
Results/Benefits Induction heating provides:
โข Hands-free brazing which requires no special operator skills for manufacturing
โข 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.