METHOD FOR INCREASING PERMEABILITY OF PORES OF GRAPHITE WORKPIECE Russian patent published in 2019 - IPC C22C47/08 B22F3/26 

FIELD: metallurgy.

SUBSTANCE: invention relates to composite materials with porous carcass impregnation having high wear resistance, antifriction properties and resistance to aggressive media. Method of producing coal-graphite composite material includes vacuum degassing of porous coal-graphite billet, its impregnation in impregnation chamber by molten matrix alloy under effect of excessive pressure due to thermal expansion of lead melt in pressure chamber at heating by 100 °C above the liquidus temperature of the matrix alloy simultaneously with the lead melt, wherein the matrix alloy is an antimony alloy, degassing is carried out before immersing the porous workpiece into the melt of the matrix alloy, and before impregnation porous workpiece is coated with galvanic coating consisting of copper layer.

EFFECT: technical result is improved quality of composite materials by increasing permeability of pores of graphite billet.

1 cl, 2 dwg, 1 tbl, 1 ex