METHOD FOR LASER WELDING OF ALLOY WORKPIECES ON THE BASIS OF THE ORTHORHOMBIC TITANIUM ALUMINIDE TI2ALNB WITH A GLOBULAR STRUCTURE Russian patent published in 2021 - IPC B23K26/21 B23K26/32 B23K26/60 B23K26/70 C21D9/50 

FIELD: aerospace and automotive industries.

SUBSTANCE: invention relates to a method for producing permanent joints of workpieces for structures made of an alloy based on the orthorhombic titanium aluminide Ti2AlNb with a globular structure and can be used for the manufacture of products in the aerospace and automotive industries. The method includes using hot-rolled workpieces from Ti2AlNb-based alloys with a globular structure for welding. One should prepare the edges for welding and assemble them butt-to-butt. After that they are preheated to a temperature of 400 ± 10 °C in a chamber with a controlled atmosphere. Welding is performed by fusion with a constant laser beam without filler material at a welding speed of 3-5 m/min. After welding, heat treatment of the welded joint is carried out for 5-6 hours at a temperature of 800 ± 10 °C.

EFFECT: invention ensures high strength and ductility of a welded joint and helps to get a welded seam without external and internal defects. The invention ensures high productivity of the welding process.

1 cl, 4 dwg, 1 tbl