AlCoCrFeNi-2^Mo-^TiC　(x　=　0,　0.　1,　0.　25,　0.4)　high　entropy　alloy　clad　layer　was　prepared　on　40CrNiMo　steel　surface　by　laser　cladding　method.　The　effect　of　TiC　and　Mo　content　on　the　microstructure　and　wear　resistance　of　the　AlCoCrFeNi-2^Mo-^:TiC　alloy　clad　layer　was　studied　through　XRD,　SEM,　EBSD,　TEM,　and　wear　resistance　tests.　The　results　show　that　after　in-situ　formation　of　TiC,　the　microstructure　of　the　clad　layer　consists　of　BCC　and　TiC　phases.　As　the　atom　fraction　of　TiC　increases,　the　size　of　carbide　precipitates　gradually　increases,　and　the　grain　size　of　the　clad　layer　is　significantly　refined,　decreasing　from　109　jxm　to　15　jxm.　The　AlCoCrFeNi-0.　8Mo-　0.　4TiC　clad　layer　has　the　highest　hardness　of　750　HV0.　3,　which　is　300　HV0.　3　higher　than　the　AlCoCrFeNi　alloy　clad　layer.　The　hardness　and　wear　resistance　of　the　clad　layer　increase　with　the　increase　of　atom　fraction　of　TiC.　The　wear　surface　of　the　AlCoCrFeNi　alloy　clad　layer　has　more　debris,　and　the　wear　mechanism　is　adhesive　wear.　The　wear　mechanism　of　the　AlCoCrFeNi-0.　2Mo-0.　ITiC,　AlCoCrFeNi-0.　5Mo-　0.　25TiC,　and　AlCoCrFeNi-0.8Mo-0.4TiC　alloy　clad　layers　are　abrasive　wear.　©　2024　Chinese　Heat　Treatment　Society.　All　rights　reserved.