Note: Brazing a steel die into a wire drawing guide

Objective:

Braze a steel die with a Polycrystalline diamond (PCD) into a wire drawing guide without any voids 

End Product:

Wire drawing guide

Equipment:

Ambrell 5 kW induction heating system, equipped with a remote workhead containing one 1.5 μF capacitor. An induction heating coil designed and developed specifically for this application. 

Materials:

0.5 india (12.7mm) Steel die with PCD, steel die 1.25 inOD (31.75mm), braze paste and diamond setting powder

Temperature:

1382 °F (750 °C) for braze paste 1832 °F (1000 °C) for diamond setting powder

Frequency:

201 kHz

Testing:

A two turn helical coil is used for brazing the assembly. Two different bonding agents are tested for the brazing application. The first bonding agent used is braze paste. The assembly is heated to 1382 °F (750 °C) and is brazed in 45 seconds. The second bonding agent used is diamond setting powder. The assembly is heated to 1832 °F (1000 °C) and the braze is completed in 5 minutes.

Benefits:

  • Rapid localized heating

  • Minimized oxidation

  • Consistent and repeatable joints

  • Even distribution of heating 

Brazing a steel die into a wire drawing guide

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