METHOD FOR LASER BUTT WELDING OF ONE OR SEVERAL BILLETS OF HARDENED STEEL WITH APPLICATION OF FILLER WIRE Russian patent published in 2017 - IPC B23K26/26 B23K26/211 B23K26/32 B23K26/70 B23K35/30 

FIELD: metallurgy.

SUBSTANCE: billet (1) or billets (1, 2) are at least 1.8 mm thick and/or at the joint (3) there is a jump (d) at least 0.4 mm thick. Laser welding is carried out with an insertion of the filler wire (10) into the melt (8) created by laser beam (6). To ensure the welded seam can reliably solidify into the martensite structure during the solidification under the press, the filler wire (10) is used which contains at least one alloying element from the group consisting of manganese, chromium, molybdenum, silicon and/or nickel, which promotes formation of austenite in the melt (8) created with the laser beam (6). At least one alloying element is presented in the filler wire (10) with at least 0.1 wt % higher than in the press-hardened billet or billets (1, 2) steel.

EFFECT: improved efficiency.

11 cl, 2 dwg