Abstract
In situ synthesized TiB2 reinforced Fe based coating was fabricated by laser cladding on steel substrate using cheaper Fe–Ti alloy, Fe–B alloy and Fe as the precursor powders. The phase composition and microstructure of the clad layer were investigated by means of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Results showed that uniformly distributed TiB2 particles with the hexagonal shape could be synthesized by the in situ reaction. The hardness and wear properties of the clad layer were greatly improved due to the presence of TiB2 particles in comparison with the substrate.
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