With the detoratiom spraying process,the WC-12%Co wear resistant coat was prepared on the surface of screw sample. The phase composition , morphology and microstructure of the coat were analyzed with X-ray Diffraction Analysis(XRD) , scanning electron microscope(SEM) and the Analysis Software(Image-Proplus) , and adhesion strength between the coat and the substrate was measured and the microhardness of the coat was tested with microhardness tester. The results of test showed that the active ingredient WC of coat material was preserved relativel...