Studi Pengaruh Penambahan Silikon Karbida (SiC) pada Paduan (FE/CU)-0,5AL terhadap Sifat Mekanik dengan Metode Metalurgi Serbuk

Abstract

Powder metallurgy is a production technique that uses powder as the starting material before the forming process. This research aims to study the effect of varying Silicon Carbide (SiC) additions on the mechanical and physical properties of gears made from the (Fe/Cu)-0.5Al alloy, with SiC variations of 2wt%, 4wt%, 6wt%, and 8wt%. The process began with horizontal ball milling at 300 rpm for 120 minutes, followed by compaction at a pressure of 250 MPa for 15 minutes, and sintering at a temperature of 770°C for 60 minutes. The results showed that the highest density was achieved at the 2wt% variation with 66.62%, while the lowest density was at the 8wt% variation with 62.53%. In hardness testing, the highest value was obtained at the 8wt% variation with 117.6 VHN, while the lowest was at the 2wt% variation with 103 VHN. These results align with the compression test, where the highest compressive strength of 526.34 MPa was achieved at the 8wt% variation and the lowest strength of 492.31 MPa at the 2wt% variation. Wear testing indicated that the lowest wear rate occurred at the 8wt% variation with 3.23x10⁻⁶ mm³/Nm, while the highest wear rate was at the 2wt% variation with 7.98x10⁻⁶ mm³/Nm. Based on these results, increasing the SiC content significantly improves the hardness, compressive strength, and wear resistance of the (Fe/Cu)-0.5Al alloy, although it leads to a decrease in density.