MAKING OF DRILL BITS WITH APPLICATION OF IMPREGNATION PROCESSES Russian patent published in 2015 - IPC B22F3/26 E21B10/42 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of drill bits by impregnation process. Solid element of the binder containing metal or metal alloy is placed to working mould. Matrix material powder layer is filled in the mould working cavity, material being based of transition metal carbide, or metal, or metal alloy containing carbide, and heated to allow transfer of fused binder from solid element for impregnation of said layer of matrix material powder. Said solid material can be placed in the channel communicated with moulding cavity in height h_mv to feed fused binder from the channel at the level below 1/2h_mv. This mould is heated to allow the passage for fused binder through the part of matrix material powder material for impregnation.

EFFECT: mean passage diameter is notably larger than mean intergranular pore of powder.

20 cl, 9 dwg, 1 tbl