Induction braze copper and brass lap joint

PUBLISHED: 20 May 16

Induction brazing copper to copper lap joint
Induction brazing copper to copper lap joint

Induction braze copper and brass lap joint to replace torch operation. Lap joints may be brass to brass; or copper to copper. The current torch process results in excessive contaminants on the assembly, and requires extensive rework after the brazing operation.

Test 1

UltraFlex UPT-W10/150

HS-8 Heat Station

Ear muff coil

Materials
Copper coupon plates 

Braze alloy - EZ Flo 45


Power
Copper - 8 kW

Temperature
Approximately 1350°F (732°C)

Frequency

87 kHz

Time
Average time - 4 minutes

Process and Results:
For Induction braze copper and brass lap joint, EZ Flo 45 braze wire was cut into 2" lengths and placed in the interface area per the attached photograph to simulate a shim preform. In a production situation, EZ Flo 45 brazing paste is recommended. The assemblies were set up (see photographs) and heated for an average timer of 4 minutes to flow the alloy and achieve the braze.

Test 2

UltraFlex UPT-W10/150

HS-8 Heat Station

Ear muff coil

Materials
Brass coupon plates

Braze alloy - EZ Flo 45

Power
Brass - 7.8 kW

Temperature
Approximately 1350°F (732°C)

Frequency

87 kHz

Time
Average time - 4 minutes

Process and Results:
For Induction braze copper and brass lap joint, EZ Flo 45 braze wire was cut into 2" lengths and placed in the interface area per the attached photograph to simulate a shim preform. In a production situation, EZ Flo 45 brazing paste is recommended. The assemblies were set up (see photographs) and heated for an average timer of 4 minutes to flow the alloy and achieve the braze.

Videos
 https://youtu.be/zA4fAC_X1wI  - Copper
https://youtu.be/npv3RJGE3SM - Brass

Ultraflex Power Technologies, USA
Tel: + 1 631 467 6814
Email: sales@ultraflexpower.com
Web: www.ultraflexpower.com

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