RF brazing carbide

Brazing Carbide Tips To Steel With Induction

Brazing Carbide Tips To Steel With Induction Heater

Objective: Braze a carbide tip to a 4140 steel cutting tool
Material: Carbide Isograde C2 & C5 tips, 4140 circular steel cutter, flux and silver braze shim
Temperature 1400 ºF (760 ºC)
Frequency 250 kHz
Equipment • DW-UHF-20 kW induction heating system, equipped with a remote workhead containing two 1.5μF capacitors for a total of 0.75μF
• An induction heating coil designed and developed specifically for this application.
Process A split helical coil is used to heat the carbide & circular steel cutter evenly for the brazing application. The circular steel cutter is placed in a vise and the carbide and braze shim are placed onto the tooth. The assembly is heated for 5 seconds to braze the carbide to the circular steel cutter. The circular steel cutter is rotated in the vise & each carbide tip is brazed separately without effecting the previous braze.
Results/Benefits Induction heating provides:
• Rapid, localized heat applied only to tip being brazed, will not effect previous brazes on the assembly
• Neat and clean joints
• Produces high quality repeatable parts

Brazing Carbide To Steel Shank

Brazing Carbide To Steel Shank with Induction

Objective :Brazing carbide teeth to a steel jaw in less than 5 minutes
Material: Steel pipe jaw, 0.5” (12.7mm) dia, 1.25” (31.75mm) long, 0.25”(6.35mm) thick carbide teeth, black flux and silver copper braze shims
Temperature: 1292ºF (700ºC)
Frequency: 300kHz
Equipment • DW-UHF-10kW induction heating system, equipped with a remote workhead containing one 0.66μF capacitor
• An induction heating coil designed and developed specifically for this application.
Process: A two turn rectangular helical coil is used to heat the carbide and steel to 1292ºF (700ºC) for 4 to 5 minutes. Three braze shims control the amount of braze and the even heat allows for
a good flow of braze creating an aesthetically pleasing bond.
Results/Benefits Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing
• Consistent, repeatable aesthetically pleasing brazes
• Even distribution of heating

Brazing Carbide To Steel With Induction

Brazing Carbide To Steel With Induction 

Objective: Braze carbide rotary file assemblies with uniform concentricity in an aerospace application

Material :

• Carbide blank

• High speed steel shank

• Temperature indicating paint

• Braze shim and black flux

Temperature 1400°F (760°C)

Frequency 252 kHz

Equipment DW-UHF-10kw induction heating system, equipped with a remote heat station containing two 0.33 μF capacitors (total 0.66 μF) An induction heating coil designed and developed specifically for this application.

Process A multi-turn helical coil is used. The part is heated to determine the time required to reach the desired temperature and required heat pattern. It takes approximately 30 – 45 seconds to reach 1400°F (760°C) depending on the various part sizes. Flux is applied to the entire part. A braze shim is sandwiched between the steel shank and carbide. Induction heating power is applied until the braze flows. With proper fixturing, concentricity of the part can be achieved.

Results/Benefits • Repeatable, consistent precise heat.

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