COMPOSITION OF ANTI-FRICTION POWDER MATERIALS ON BASE OF COPPER Russian patent published in 2010 - IPC B22F1/00 C22C1/05 F16C33/12 C22C9/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to powder metallurgy, particularly to anti-friction materials for high-loaded friction units. The invention can be implemented, for example for fabrication of anti-friction bushings. Anti-friction powder material on base of copper is produced out of charge containing, wt %: tin powder 0.5-10; led powder 0.5-1.0, graphite 0.3-0.5; copper powder - the rest. Charge is pressed and sintered at successive increase of temperature from 20 to 600°C and conditioning during 1.5 hours. Further temperature is raised to 660 ± 5°C, charge is conditioned during 1.5 hours and cooled in air by means of blow-off in a flow of dissociated ammonia. Charge is then calibrated at specific pressure equal to compacting pressure and is repeatedly sintered with successive increment of temperature form 20 to 860 ± 5 °C, holding during 1.5 hours and cooling in air.

EFFECT: produced material possesses high anti-friction property and high wear resistance.