Induction Brazing Carbide To Steel

Objective
Induction Brazing carbide to steel parts

Equipment
DW-HF-15kw Induction Heating Power Supply

HLQ custom coil

Key Parameters
Power: 5.88 kW
Temperature: Approximately 1500°F (815°C)
Time: 10 sec

Materials
Coil- 
2 helical turns (20 mm ID)
1 planar turn (40 mm OD, 13 mm Height)

Carbide- 
13 mm OD, 3 mm wall thickness

Steel piece
20 mm OD, 13 mm ID

Process:

  1. To demonstrate elimination of “hand feeding” the alloy, we formed the alloy into a ring to tightly fit over the center post tube. This method provides a uniform amount for each cycle, resulting in uniform joints and wetting.
  2. The custom made coil was then placed over the steel piece, where is was set for 10 seconds to heat the alloy.
  3. The alloy was heated at approximately 1500°F (815)°C
  4.  The whole piece is left alone and cooled with ambient air

Results/Benefits:

  • Induction Brazing was successful all in under 15 seconds with 8kW
  • High quality and repeatability of the brazed joints
  • Increased productivity
  • Rings will need to be developed for specific joints to prevent the use of too much alloy
  • Precise control of the time and temperature