To　surpass　the　current　level　of　mechanical　properties　exhibited　by　CoCrNi　medium-entropy　alloys　(MEA),　(CoCrNi)100−x(WC)x　(x　=　0,　2,　4　and　6　for　molar　ratio)　MEA　samples　were　prepared　using　powder　metallurgy　with　atomized　powder　as　the　raw　material,　and　the　influence　of　WC　content　on　the　microstructural　evolution　and　mechanical　properties　of　the　sintered　MEAs　was　investigated.　As　the　WC　content　increased,　the　phase　structure　of　the　sintered　MEAs　changed　from　a　single　FCC　phase　to　an　FCC+Cr23C6　phase,　while　the　grain　size　of　the　matrix　decreased.　Consequently,　the　strength　of　the　alloy　exhibited　significant　improvement.　For　instance,　the　tensile　yield　and　fracture　strengths　of　(CoCrNi)98(WC)2　were　measured　at　574　and　971　MPa,　respectively,　while　maintaining　a　plasticity　of　approximately　41.6%.　Furthermore,　the　addition　of　WC　led　to　a　considerable　increase　in　the　hardness　for　(CoCrNi)94(WC)6,　reaching　314.7　HV,　which　was　nearly　50%　higher　than　that　of　the　CoCrNi　matrix.　The　increased　hardness　proved　beneficial　in　enhancing　the　material＇s　wear　resistance,　which　first　increased　and　then　decreased.　The　wear　mechanisms　primarily　involved　abrasive　and　oxidation　wears.　The　observed　increase　in　yield　strength　can　be　attributed　to　the　combined　effects　of　multiple　strengthening　mechanisms.　The　individual　contributions　of　these　mechanisms　were　quantitatively　evaluated　and　compared　to　the　actual　values,　demonstrating　consistency　with　the　calculated　results.　Notably,　solid-solution　strengthening　emerged　as　the　principle　strengthening　mechanism.　©　2023　Elsevier　Ltd