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Laser Coating of Fe-Based Alloys with Face Centre Cubic (FCC) TiB Powder
J.D. Hu, J.C. Zhao, J.J. Ren, Y. Cao and S. Tosto

Recently, face centre cubic TiB (FCC-TiB) powder was fabricated [1]. In this study we use FCC-TiB powder as additives to coat Fe-2 Cu-0.7 C powder metallurgy (P/M) material and stainless steel Fe-based alloys with a high-power CO2 laser. The microstructures in the melt zone were examined by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). FCC-TiB particles were homogeneously dispersed in the laser-coated zones, still remaining original face centred cubic structure. The results showed that FCC-TiB powder can be directly added into Fe-based alloys as the enhancements by laser coating.

Keywords: CO2 laser, laser coating, powder, face centred cubic (FCC), TiB, powder

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