PENGARUH PENAMBAHAN GRAFIT SEBAGAI REINFORCEMENT KOMPOSIT PERUNGGU TERHADAP SIFAT KETAHANAN AUS

Abstract: The influence of graphite addition as reinforcement composite of bronze on wear resistance. It is important to increase the properties of wear resistance of metal conducted by forming metal matrix composite with graphite particle reinforcement. This purpose of this research is to identify the wear resistant and microstructure of bronze matrix composite reinforced by graphite. The research used laboratory experiments. The material of experiment is acquired from bronze/graphite composite obtained from melting copper which has been added with tin (Sn) of 10% and a graphite particles in 0%, 3%, 6% and 9% of weight. Wear resistance test is conducted by using pin-on-disc method. The results show that increasing graphite particles in bronze gives hardness degradation of the composite. The result of wear resistant test shows that the greater of free graphite content in bronze the better wear resistant. Wear lowest rate is obtained on composite of 9% graphite-reinforced bronze with 0.00074 mg/meter mean of wear rate, while 0%, 3%, 6% graphite-reinforced bronze have 0.00776 mg/meter, 0.00592 mg/meter, and 0.00330 mg/meter wear rate respectively