Studi Karakteristik Paduan (CuNi)-2.5wt.%Fe dengan Penambahan Variasi Tungsten Menggunakan Model Pencampuran V-Mixer

Abstract

This research aims to analyze the effect of varying tungsten (W) compositions on the mechanical properties, electrical conductivity, and microstructure of a Cu-Ni-2.5wt.%Fe alloy, used as an electrode in Electric Discharge Machining (EDM). The alloy was produced using powder metallurgy with tungsten compositions of 1, 3, 5, and 7 wt.%. The mixing process was carried out using a V-Mixer for 120 minutes at 120 rpm, while compaction was done at a pressure of 250 MPa for 15 minutes. The alloy was then sintered at 770 °C with a holding time of 1 hour. The results showed that the addition of tungsten increased the hardness, density, and compressive strength of the alloy, and improved the electrical conductivity, which had decreased due to the addition of Fe. Additionally, variations in tungsten composition affected the alloy’s microstructure. The addition of tungsten to the copper-nickel-iron alloy significantly improved its mechanical properties and electrical conductivity, making it a suitable material for EDM electrodes with excellent wear resistance and conductivity.