ANTIFRICTION MATERIAL "ROMANIT-C", A METHOD FOR PREPARATION THEREOF, AND A FRICTION UNIT ELEMENT Russian patent published in 2004 - IPC

FIELD: antifriction materials. SUBSTANCE: invention relates to antifriction materials obtained by powder metallurgy technique and employed in friction units of machines, mechanisms, equipment, and current transfer elements. Material contains, wt %: ferrophosphorus 0.5-10.0, sulfur 0.5-12, iron 10.91-26.25, graphite 0.16-5.16, granules 2.0-24.0, and copper - the balance. Material is made in the form of fritted powders with local granule inclusions. Granules are 0.4-2.0 mm in size and contain copper (37.0-60.0%) and graphite. Material is prepared by granulation of copper and graphite powders' mixture followed by mixing granules with powders of ferrophosphorus, copper, graphite, and iron. Resulting blend is molded and fritted. Invention describes a friction unit element with baked layer of resulting antifriction material. EFFECT: increased mechanical strength and wear resistance, lowered friction coefficient, and acquired ability to form, on material surfaces, separating films preventing wear of contacting pair. 9 cl