Ni-Cr-TiB

2

-CaF

2

composite coating was prepared by laser cladding on the surface of the Cu-CrZr alloy with KF-6as transition layer in order to understand influence of different mass percentage of TiB

2

ceramic particles reinforced phase on microstructure and properties of the composites prepared.Microstructure and micro-hardness of the composite coating are characterized by optical microscopy（OM）

scanning electron microscopy（SEM）

energy dispersive spectrometer（EDS）and X-ray diffraction（XRD）.The friction and wear properties of the coating were evaluated.The results indicate that microstructure of the composite coating with 5% and 10% TiB

2

is mainly composed of particles and dendritic structure.With the increase of TiB

2

content

plate structure and block aggregation of TiB

2

can be observed in microstructure of the composite coating.The micro-hardness of the composite coating with20% TiB

2

is about 1 200HV

0.1

which is about 12 times of the copper alloy.In addition

the frictional coefficient of composites with wear-resisting performance is about 0.30 at room temperature.