COMPOSITION OF ANTI-FRICTION POWDER MATERIALS ON BASE OF COPPER

摘要

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 600C and conditioning during 1.5 hours. Further temperature is raised to 660 5C, 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.