Apparatus and method for welding duplex stainless steel

Details Apparatus and method for welding duplex stainless steel Apparatus and method for welding duplex stainless steel

2005-04-26

2005-04-26

Elve, M. Alexandra (Department: 1725)

Electric heating

Metal heating

By arc

C219S136000, C219S13700R

Reexamination Certificate

active

06884963

ABSTRACT:
Arc welding of duplex stainless steel tubing is accomplished using a non-pulsed electric arc and a high refractory weld flux. Weld beads, uniform throughout their lengths, and having a duplex phase structure and desirable profile are produced by single pass orbital welding, even if the wall thickness of the duplex tubing exceeds 2 mm.

REFERENCES:
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patent: 4952769 (1990-08-01), Acheson
patent: 5711474 (1998-01-01), Hummel
patent: 5804792 (1998-09-01), Paskell
patent: 5864111 (1999-01-01), Barefoot
patent: 6129999 (2000-10-01), Ueda et al.
PCT International Search Report, PCT/US00/17414, Swagelok Company.

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