THE EFFECT OF GRAPHITE AND CU CONTENT ON TRIBOLOGICAL BEHAVIOR IN CU-SN SINTERED FRICTION MATERIALS

摘要

We have investigated the effects of graphite and cupper contents on the tribological properties ofCu-base sintered friction materials. The base composition of the sintered materials was Cu-Sn-Fe-SiC-C. We varied graphite contents from 20 to 30 vol% with an interval of 5% and Cucontents of 25 and 35 vol%. All the specimens were sintered for 15 min at 750°C, nitrogenatmosphere by hot press method. Their friction and abrasive characteristics was evaluated by 1/5scale dynamometer. When the Cu content is decreased, we can get higher friction coefficientand less abrasion. The lowest abrasion was obtained at the condition of 30 vol% graphite. Thehighest friction coefficient was obtained in the specimen of 20 vol% graphite.