A　Ni-coated　graphene　(Ni-Gr)　reinforced　Inconel　625　composite　was　prepared　by　selective　laser　melting.　The　microstructure　of　the　composite　exhibited　random　aligned　columnar　dendrites　due　to　the　addition　of　Ni-Gr.　The　Ni-Gr　defects　were　alleviated　under　high-intensity　laser-beam　irradiation.　The　Micro-CT　showed　that　the　pore　density　increased　by　46%　of　Inconel　625　due　to　the　addition　of　Ni-Gr.　The　flaky,　open-ring　NiGr　appeared　due　to　the　action　of　Marangoni　convection　and　the　surface　tension.　Furthermore,　the　addition　of　Ni-Gr　improved　the　diffusion　capacity　of　the　friction　heat.　Inconel　625　composite　displayed　tiny　bits　of　oxidized　debris.　(c)　2021　Elsevier　B.V.　All　rights　reserved.