Microstructure and properties of laser cladding CuMn13Al8Fe3Ni2 coating

The CuMn13Al8Fe3Ni2 coating was fabricated on CuMn13Al8Fe3Ni2 matrix by laser cladding technology. The microstructure, phase composition microhardness and electrochemical properties of the coating were analyzed by scanning electron microscopy, X-ray diffractometer, Vickers microhardness tester, electrochemical workstation and other equipment. The result of this study showed that the phases in the CuMn13Al8Fe3Ni2 laser cladding coating consist of α phase (solid solution of Cu), β phase (Cu3Al) , γ2 phase (Al4Cu9) and phase (AlFe, AlFe3, Ni2MnAl). When the laser cladding parameters are laser power 1600 W, scanning speed 6 mm/s, speed of powder feeder 2.0 r/min, carrier gas flow rate 3.5 L/min, the laser cladding CuMn13Al8Fe3Ni2 coating had average microhardness of 267HV0.2, self corrosion potential -0.271 V and self-corrosion current density 3.73×10-6 A·cm2.