K403　alloy　is　promising　in　aero-engine　and　gas　turbine　components　due　to　its　outstanding　mechanical　properties.　Here,　in　order　to　investigate　the　manufacturability,　K403　coating　was　prepared　on　casted　K403　substrate　by　laser　melting　deposition　(LMD).　The　microstructure,　microhardness,　and　wear　performance　of　the　coatings　were　studied.　The　results　showed　that　the　coating　mainly　consists　of　Ni-3　(Al,　Ti),　Co3Ti　and　Cr3Mo.　The　microstructure　of　the　coating　is　closely　dependent　on　laser　power.　Precipitates　were　formed　in　the　coating　due　to　these　high　melting　point　elements.　The　highest　microhardness　of　K403　superalloy　coating　is　455　HV0.2,　which　is　40%　higher　than　that　of　casted　K403　substrate.　K403　superalloy　coating　also　showed　a　better　wear　resistance　than　casted　K403　substrate.　The　wear　rate　and　friction　coefficient　of　the　K403　coating　are　only　41%　and　70%　of　those　of　the　casted　K403,　respectively.　Furthermore,　the　formation　of　crack　was　discussed.　We　envision　direct　laser　melting　deposition　of　K403　superalloy　can　be　an　effective　way　to　repair　and　enhance　tribological　performance　of　K403　superalloy　components.　(C)　2019　Elsevier　B.V.　All　rights　reserved.