Process for the butt-welding of especially deep-drawable steel s

Details Process for the butt-welding of especially deep-drawable steel s Process for the butt-welding of especially deep-drawable steel s

1986-01-21

1987-03-17

Albritton, C. L.

Electric heating

Metal heating

By arc

219105, 219121FS, 219161, B23K 2600

Patent

active

046509542

ABSTRACT:
A process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side, in which the welding seam is protected against corrosion. To obtain a welding seam flush with the sheet and protected against corrosion, without the reworking of the welding seam and without the use of filler material, sheets or strips having essentially rectangular cut edges with a corrosion in the longitudinal direction of at most 0.4 mm are used. The sheets and strips brought into touch contact with these cut edges are melted in the region of the welding joint by means of a laser beam, of which the focal spot covering the cut edges has a diameter of at most 0.2 mm. Because of the extremely narrow welding gap, the voids are filled by the molten material of the adjacent sheets, without any detectable reduction in the thickness of the sheets or strips. Furthermore, the welding seam is protected against corrosion as a result of the long-range protection effect exerted by the zinc of the adjacent regions.

REFERENCES:
patent: 1773068 (1930-08-01), Vienneau
patent: 2852660 (1958-09-01), Maloney
patent: 3535489 (1970-10-01), Hinrichs
patent: 3881084 (1975-04-01), Baardsen
patent: 3909582 (1975-09-01), Bowen
patent: 4000392 (1976-12-01), Banas et al.
patent: 4417125 (1983-11-01), Tsutsumi

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