Selective laser melting of CuP alloy powder

For the sake of directly fabricating metal parts by means of selective laser melting, experimental study about rapid manufacturing metal parts from CuP powder with average particle size of 75μm were carried out on Dimetal 240 equipped with a 200W CW Nd:YAG laser, laser power 103W～117W, scanning speed 0.25m/s～0.41 m/s (inner),0.15m/s (frame), powder thickness 0.2mm.The scanning electron microscope (SEM) and the metalloscope were used to analyze the microstructure of the sample.The results show that a complete metallurgical bonding is obtained after selective laser mehing process and the density reaches 90%.The intra-layer microstructure is slender arborescent crystalwhile microstructure between layers is small isometric crystal.Therefore, it is feasible to directly manufacture metal parts by means of selective laser mehing under appropriate parameters.