Pengaruh Metode Pencampuran Metalurgi Serbuk Terhadap Struktur Mikro, Sifat Mekanis, dan Konduktivitas Listrik Paduan (CuNi) – 5wt.%Mo – 4wt.%SiC

Abstract

In the industrial sector, Electrical Discharge Machine (EDM) is the most commonly used non-traditional machining process because its capablelity of working on very hard conductive materials. The EDM machining process is highly dependent on the electrode used. The ideal EDM electrod must have a high melting point, high electrical conductivity, high density, high thermal conductivity, easy to machine, and low cost. One material alone cannot meet all of these requirements. This study presents the characterization of (CuNi) - 5wt.% Mo - 4wt.% SiC alloy for EDM electrodes using 3 variations of powder metallurgy mixing methods which is Horizontal Milling, V-Mixer, and Mechanical Alloying mixing. The test results obtained are that the specimen produced by the Mechanical Alloying has the best mechanical properties compared to the Horizontal Milling and V-Mixer specimens, where this specimen has a density of 5.65 gr/cm3, a hardness of 65.1 VHN, a maximum stress at a load of 20 tons of 387.42 MPa, an electrical conductivity of 3.590 × 107 S/m, and a crystal size of 24.68 nm. It can be concluded that the mixing method in powder metallurgy has an important role in producing good mechanical properties of composites