Machinable Cu-40%Zn Composites Containing Graphite Particles by Powder Metallurgy Process

Figure 1

Optical microstructures of hot extruded Cu-40%Zn alloys by using cast billet (a) and P/M billets with various contents of graphite particles (b)–(f). (unit; mass%).

(a) Cast billet

(b) P/M billet (Gr; 0%)

(c) P/M (5 𝜇m-Gr; 1.0%)

(d) P/M (15 𝜇m-Gr; 0.8%)

(e) P/M (15 𝜇m-Gr; 1.0%)

(f) P/M (15 𝜇m-Gr; 1.2%)