METHOD FOR INCREASING PERMEABILITY OF PORES OF GRAPHITE WORKPIECE Russian patent published in 2019 - IPC B22F3/26 C22C1/08 B60L5/00 

Abstract RU 2688476 C1

FIELD: metallurgy.

SUBSTANCE: method involves vacuum degassing of porous coal-graphite billet, its impregnation in impregnation chamber with melt of matrix alloy under effect of excessive pressure due to thermal expansion of lead melt in pressure chamber at heating per 100 °C above the liquidus temperature of the matrix alloy simultaneously with lead melt. Copper-phosphorous alloy is used as matrix alloy, degassing is performed before immersion of porous workpiece into melt of matrix alloy, and before impregnation porous workpiece is coated with three-layer galvanic coating consisting of inner copper, medium nickel and outer chromium layers.

EFFECT: invention relates to production of coal-graphite composite material.

1 cl, 2 dwg, 1 tbl, 1 ex

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RU 2 688 476 C1

Authors

Gulevskij Viktor Aleksandrovich

Miroshkin Nikolaj Yurevich

Golovinov Pavel Stanislavovich

Kidalov Nikolaj Alekseevich

Dates

2019-05-21Published

2018-01-16Filed