METHOD FOR JOINING METAL PARTS Russian patent published in 2022 - IPC B23K1/00 B23K35/36 

FIELD: metal soldering.

SUBSTANCE: invention relates to the soldering of metal parts (11,12) having a solidus temperature above 1100°C. A melting temperature lowering composition (14) is applied to the surface (15) of the first metal part (11), which contains a melting temperature lowering component comprising at least 25 wt.% boron and silicon. The second metal part (12) is brought into contact with the melting temperature-lowering composition (14) at the point (16) of contact on the said surface (15). The first and second metal parts (11, 12) are heated to a temperature above 1100°C to ensure solidification of the molten metal layer (210) of the first metal component (11) to obtain a joint (25) at the point (16) of contact.

EFFECT: mentioned boron is at least partially derived from a chemical compound of boron selected from the following compounds: boric acid, borax, titanium diboride and boron nitride, which are safe and contribute to a strong connection between metal parts.

14 cl, 14 dwg, 6 tbl