A　TiB2-TiC/Fe　composite　coating　was　successfully　produced　on　a　Q235　substrate　by　laser　cladding　through　in-situ　reactions　among　60TiFe,　B4C,　Cr,　Ni,　and　Si　preset　powder　mixtures.　Based　on　the　available　literature,　scanning　electron　microscopy　images　of　the　mixed　precursor　powder　and　coating　layer,　and　corresponding　electron　dispersive　spectroscopy　and　X-ray　diffraction　results　from　the　produced　coating,　the　formation　mechanism　of　the　TiC-TiB(2)composite　during　laser　cladding　was　determined.　The　results　show　that　the　coating　was　mainly　composed　of　alpha-Fe,　TiB2,　TiC　and　(Fe,　Cr)(7)C-3,　where　the　TiB(2)had　a　dark　grey　rectangular　shape　and　TiC　had　a　light　grey　spherical　shape.　Most　of　the　TiC　particles　were　attached　to　the　TiB2,　which　means　that　TiB(2)particles　were　formed　before　the　TiC.　The　microhardness　of　the　composite　coating　approached　1260　HV0.2,　which　shows　that　the　microhardness　of　the　composite　coating　was　more　than　7　times　that　of　the　Q235　substrate.　Furthermore,　the　wear　performance　of　the　coating　was　obviously　improved,　to　approximately　15　times　that　of　the　substrate.