METHOD FOR OBTAINING SHEET BILLETS FROM HARDENED STEEL COATED ON ALUMINUM OR ALUMINUM-SILICON BASED COATING Russian patent published in 2019 - IPC B23K26/26 B23K26/322 B32B15/01 B23K35/30 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for producing a sized, hot-deformed sheet. At least two sheets (1, 2”) of steel of different grade and / or of different thickness are butt-joined by laser welding. At least one of the sheets is made of hardened steel under a press and has a metal coating (1.1, 2.1) based on aluminum or aluminum-silicon. Steel sheets (1, 2”) are welded to each other with the formation of a gap (G) limited by edges being welded together and having an average width of (b) not less than 0.15 mm. Filler wire (8) is fed into the gap (G) so that the ratio between the filler wire volume entered into the gap (G) and the volume of steel sheet material melted by the laser beam (4) is at least 20 %.

EFFECT: technical result consists in eliminating the need for preliminary removal of the coating along the edge of the edges being welded.

16 cl, 4 dwg