METHOD OF PRODUCING FILLER RODS Russian patent published in 2014 - IPC B23K35/40 B23K9/04 

FIELD: process engineering.

SUBSTANCE: invention can be used for production of filler rods for surfacing of drill tools in contact with well walls, for example, blade drill bits. Solid alloy is ground to required grain size of hard alloy grit to be cleaned of dust and fine fragments. Brass wire is cut to lengths powder solder ingredients are mixed. Initial components are laid layer-by-layer. First thin layer of solder is filled in mould bottom, first half of hard alloy grit portion is laid and levelled. Hard alloy grit remainder is laid on solder second layer. Brass wire lengths are laid on solder third layer without allowances to fill in the fourth solder layer. Mood is placed, without mixing or displacing of components, into induction furnace and heated to fusion of brass wire lengths and solder. Mould withdrawn from furnace, produced filler rods are cooled down. Said mould is composed of graphite plate with recesses for several filler rods.

EFFECT: higher mechanical properties of the rods, higher reliability and longer life of welded parts.

9 cl, 3 dwg