Effects of annealing temperature on microstructure and properties of Ni-Co alloy coating were investigated by means of scanning electron microscope,X-ray diffractometer,microhardness tester and nanoindentation. The results show that the Ni-Co alloy coating presents( 111) preferred orientation. With the increase of annealing temperature,the diffraction peaks gradually sharp,the grains grow up,and the residual stress,hardness and elastic modulus are decrease. The maximum decrease of hardness and elastic modul...