Microstructure and Properties of W-Cu Composites Fabricated by Laser Cladding Forming

In this paper, the rapid prototyping of W-Cu composites by laser cladding was reported. The influence of the mass ratio of W and Cu on the structure and properties were investigated. Ni and Co were added to the W-Cu composites to promote the sintering densification. The effect of the elements on the structure, phase composition and properties of W-Cu composites was investigated by using X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDX) and hardness test. The results showed that when Cu content increases to 60 wt.%, W particles were distributed around Cu agglomerates. When Ni content increases to 3.0 wt.%, γ-Ni phase could be observed. It was found that Co was concentrated at the interface between W and Cu phase and enhance the diffusion of W in Cu phase. Both Ni and Co could increase the density of the W-Cu composites greatly.