CoNiCrAlY alloy deposited on surface of SCH13 steel by laser cladding

The surface of SCH113 steel was deposited with CoNiCrAlY alloy by a high power CO₂ laser.Through,the excellent coatings can be acquired by the optimized process pa-rameters.The micro-structure,composition,hardness and corro-sive resistance of the coating were examined by scanning electron microscope (including EDS microanalysis) ,X-ray diffraetome-try,micro thickness meter,wear test machine.The results indi-cated that the coating of CoNiCrAlY alloy has a good metallurgi-cal combination with SCH13 steel,and the other characteristics such as fine microstructure,no cracks,low dilution rate and the smooth transition of elements at the interface.The coatings were consisted of γ-Co,FeCr_0.29Ni_0.16C_0.06,FeNi,CoC_x and Cr₂₃C₆ phases.The average microhardness of the coating is 3 times higher than that of the SCH13 steel.Furthermore,the wear re-sistance of laser cladded coating is 3.42 times higher than that of the matrix.