Analisa Sifat Fisis dan Mekanis Pulley Hasil Coran dengan Bahan Tambah Piston Bekas

Material development of parts and tools is done to get more advantage than its raw material, especially in its application in some operational. The one of recycle material is an unused piston. Piston is a motorcycle component that uses to press an air in the motorcycle cylinder, to generate work or power. Because of life time or damage, a piston is break or wear (the most damage of piston is wear). Refer on above back-ground; this research is conducted to enhance the mechanical and physical properties of pulley with an unused piston as an additive material. A piston material is chosen because it is an aluminum alloy with the better composition and better amount than the other unused aluminum. The orientation of this research is product development of small scale industry casting. The contribution of this research is to enhance the product quality and product quantity so that it can compete with other same product from the big scale industry. The aluminum alloy of unused piston from small scale industry has composition : Al (84,76%), Si (1,04%), Fe (1,04%), Cu (2,17%), Mn (0,24%), Zn (3,53%), Sn (0,07%), Pb (0,18), Ti (0,06), and others (0,14%). As soon as heat treatment process, the Brinell Hardness Number (BHN) is 125,76, which before the process is 59,19. The composition of element of aluminum alloy will raise the mechanical properties of the pulley from home industry. And then, the distributing of element can influence the surface hardness, which more evenly distribute is more evenly its surface hardness