In　this　study,　CoCrW　alloys　with　different　Cu　contents　(0,　2,　3,　and　6　wt%)　were　prepared　by　selective　laser　melting　for　dental　applications.　The　bonding　strength　between　porcelain　and　the　metal　in　porcelain-fused-to-metal　dental　restorations　could　be　considerably　affected　by　the　quality　of　Cr　oxide　formed　on　CoCr-based　alloys.　Recent　studies　revealed　that　the　Cu　element　could　affect　the　oxidation　behavior　of　austenitic　steels.　Therefore,　it　is　essential　to　investigate　the　effect　of　the　Cu　element　introduction　on　the　oxidation　performance　of　CoCrW　alloys.　The　SEM　and　SPM　indicated　that　the　Cu　element　considerably　affected　the　microstructures　and　the　roughness　of　the　oxide　layer.　XRD　analysis　showed　that　the　oxide　layer　in　CoCrW　alloys　was　mainly　composed　of　Cr2O3　and　CoCr2O4,　while　trace　amounts　of　CuO　and　Cu2O　were　found　after　the　addition　of　the　Cu　element.　The　depth　profiles　obtained　by　XPS　suggested　that　the　Cu　content　in　the　film　structure　could　affect　the　thickness　of　the　Cr　oxide　regions,　which　revealed　that　the　addition　of　the　Cu　element　accelerated　the　oxidation　of　CoCrW　alloys　by　promoting　the　diffusion　of　the　O　element　into　the　inner　layer.　The　three-point　bending　test　indicated　that　the　addition　of　Cu　had　a　negative　effect　on　the　bonding　strength　between　porcelain　and　the　metal　substrate.