Cutting picker with high chromium Fe-based composite coating prepared by plasma surface metallurgy

The high chromium Fe-based composite coating was successfully fabricated on the low-carbon low alloy steel by plasma surface metallurgy with the powders which were obtained by heating a mixture powders and sucrose to pyrolyze the sucrose as carbonaceous precursor.The microstructure and microhardness of the coating were studied by scanning electron microscope, X-ray diffraction, energy dispersion spectroscope and microhardness instrument. Wear and impact test were also analyzed by wear tester and impact tester.The results indicate that the interface between coating and matrix of the composite was metallurgically bonded, and the matching performance of the coating was excellent and each performance advantages were developed.The composite was used to coat cutting picker, which simplify the heat-treatment process and reduce the production costs.It indicate that all of the properties surpassed the industry technical standards.