The goal is to braze steel tube to steel tube in 60 seconds using flux and braze alloy.
• Steel tube (Magnetic) and steel receiver
• Braze alloy (CDA 681)
• B-1 Flux
Temperature: Approximately 1750° F (954° C)
Frequency: 148 kHz
- The assembly was pre-fluxed (B-1) and assembled with a single braze alloy preformed ring at the interface.
- The assembly was inverted to permit the receiving section to be at the bottom and permit gravity to assist with the alloy flow.
- The assembly section was supported on a jack table with a center pivot to permit the parts to be rotated. This ensured uniform heating of the steel in the open “C” coil.
- Alloy flow and joint completed in 60 seconds.
- The material was cooled in water following the completion of brazing.
- The joint was then cross-sectioned to validate that the brazing process had produced a strong, high quality joint.
Induction heating provides:
- Strong durable joints
- Selective and precise heat zone, resulting in less part distortion and joint stress than welding
- Less oxidation
- Faster heating cycles
- More consistent results and suitability for large volume production, without the need for batch processing
- Safer than flame brazing