Dense　near-nanostructured　WC-Co　coatings　with　hardness　above　1400　HV0.3　were　fabricated　by　high　velocity　oxy-fuel　spraying　using　the　in　situ　synthesized　WC-Co　composite　powders　containing　VC　and　Cr3C2.　The　carbide　additives　inhibited　WC　coarsening　effectively　and　facilitated　formation　of　the　clustered　structures　consisting　of　WC　grains　and　amorphous　Co.　Owing　to　the　dragging　effect　of　clusters,　the　connected　WC　particles　are　much　more　difficult　to　be　peeled　off　than　the　isolated　WC　particles.　Therefore,　the　wear　resistance　of　the　near-nanostructured　coating　was　significantly　enhanced.　The　mechanisms　proposed　the　importance　of　interfacial　characteristics　for　the　wear　resistance　behavior　of　the　cermet　coatings.