Magnetic Pulse Welding of the “Tube – Plug” Pair of STS410 Steel
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Date
2014
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Abstract
The research was focused on the magnetic pulse welding (MPW) of 12.5% Cr steel
STS410. The experiments were performed in the tube-plug geometry (both details were
made of the same steel). Magnetic pulse unit consisted of pulsed current generator (PCG)
loaded to a single-turn coil. Magnetic field amplitude of 40 T was generated in the coil
during experiments. The amplitude of pulsed current reached 750 kA.
The effects of energy storage capacity, charging voltage, and end plug shape were
studied. The welded samples were investigated by optical microscopy. The optimal
velocities of impact and contact front motion were evaluated as 300 m/s and 3-3.5 km/s,
respectively.
The paper includes the leakage test results as well. To date, the joints with a helium
leak rate of 10-9 mbar·l·s-1 have been produced.
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Keywords
Welding, Steel, Magnetic Pulse Welding