Laser Coating of Fe-based Alloys with Face Centre Cubic (FCC) TiB Powder

摘要

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 CO_2 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.