Abstract:In this paper, the high entropy alloy CrFeNiAlSiCux (x=0.2-1.2) is prepared by laser self-propagating sintering by adding non-equimolar ratio Cu element into Cr, Fe, Ni, Al and Si pure powder and then pressed into blank. It is characterized by OM, XRD, SEM and EDS, Vickers microhardness tester, abrasive wear machine and electrochemical workstation, and its phase structure, microstructure, density and porosity, hardness, wear resistance and corrosion resistance are analyzed. The results show that the sintered alloy always coexists with BCC and FCC phase. With the addition of Cu element, FCC phase increases, but BCC phase is still more than FCC phase. The alloy is a typical dendrite structure accompanied by many chrysanthemum like structures, which mainly contain Cr, Fe, Si and Ni elements, and interdendritic structure mainly contains Cu element. CrFeNiAlSiCu0.4 has the best comprehensive performance, the maximum microhardness is 908.68HV, the minimum wear per unit area is 48 mg·cm-2, the minimum corrosion current is 0.4100 A/cm-2, and the maximum corrosion potential is -149.264 mV.