Note: Brazing a magnetic steel rotor assembly
Objective:
Brazing a steel impeller and shaft
End Product:
Steel impeller and shaft
Equipment:
Ambrell EASYHEAT 3.5 kW 400kHz induction heating system, equipped with a remote workhead containing one 1.0Ä μF capacitor An induction heating coil designed and developed specifically for this application.
Materials:
Steel impeller 2.0 in (500mm) diameter, with a 0.25 in (6mm) steel shaft, braze ring
Temperature:
1450 °F (780 °C)
Frequency:
262 kHz
Testing:
A two-turn helical coil is used to heat the impeller. The part is placed inside the induction coil and heated to 1450 °F within 1 minute to flow the braze ring. Induction is proposed to replace a hand-operated flame process requiring operator training and expertise. Induction heating delivers a precise, repeatable and reliable process. Improved joint quality is coupled with simplified operation.
Benefits:
Heating directly into the part, saving energy
Hands-free operation
Precise control of heat
Even distribution of heating
Elimination of flame hazard, torch maintenance

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