Research on WC-12%Co coat of detonation spraying for screw surface

Abstract

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 relatively well, the coat was dense, the porosity of the coat is 3.30%, the adhesion strength of the coat and the substrate was above 96.25σ/Mpa and the average microhardness of the coat was about 1264.4HV. And the contrast test of wear resistance showed that the using life of the WC-12%Co detonation spraying coat reached 4.2 times the using life of the traditional carburizing and quenching coat.