Method of multiple electrode gas shielded arc welding

Details Method of multiple electrode gas shielded arc welding Method of multiple electrode gas shielded arc welding

1975-11-17

1977-07-05

Truhe, J. V.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219137R, B23K 916

Patent

active

040341798

ABSTRACT:
In a multiple electrode gas shielded arc welding method wherein a plurality of electrodes are arranged along the welding seam line of a piece of metal to be welded and the continuous gas shielded arc welding of the piece is accomplished simultaneously by the electrodes, the chemical composition of a mixed shielding gas fed to the electrodes is selected in such a manner that the chemical composition of the shielding gas fed to the leading electrode or electrode group differs relative to that fed to the trailing electrode or electrode group to have a different active gas volume ratio and in this way the chemical composition of the weld metal layers formed by the preceeding and following welding operations are homogenizing to ensure uniformity of the properties at every positions in the weld zone.

REFERENCES:
patent: 2756311 (1956-07-01), Persson et al.
patent: 2868954 (1959-01-01), Skinner et al.
patent: 3007033 (1961-10-01), Newman et al.
patent: 3278720 (1966-10-01), Dixon
patent: 3309491 (1967-03-01), Jacobs
patent: 3596051 (1971-07-01), Nomura
patent: 3644697 (1972-02-01), Krahl
patent: 3704358 (1972-11-01), Saito et al.

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