Abstract
Fe-based coatings reinforced by spherical WC particles were produced on the 304 stainless steel by plasma transferred arc (PTA) to enhance the surface wear properties. Three different Fe/WC composite powder mixtures containing 0wt%, 30wt%, and 60wt% of WC were investigated. The microstructure and phase composition of the Fe/WC composite PTA coatings were evaluated systemically by using scanning electron microscope (SEM) and X-ray diffraction (XRD). The wear properties of the three fabricated PTA coatings were investigated on a BRUKER UMT TriboLab. The morphologies of the worn tracks and wear debris were characterized by using SEM and 3D non-contract profiler. The experimental results reveal that the microhardness on the cross-section and the wear resistance of the fabricated coatings increase dramatically with the increasing adding WC contents. The coating containing 60wt% of WC possesses excellent wear resistance validated by the lower coefficients of friction (COF), narrower and shallower wear tracks and smaller wear rate. In the pure Fe-based coating, the main wear mechanism is the combination of adhesion and oxidative wear. Adhesive and two-body abrasive wear are predominated in the coating containing 30wt% of WC, whereas threebody abrasion wear mechanism is predominated in the coating containing 60wt% of WC.
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Funded by the Ocean Public Science and Technology Research Fund Projects of China (No. 201405013-3), the National Natural Science Foundation of China (No.51609133), the China Postdoctoral Science Foundation (No.2017M620153) and the Science & Technology Program of Shanghai Maritime University (No.20130448)
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Fan, L., Dong, Y., Chen, H. et al. Wear Properties of Plasma Transferred Arc Fe-based Coatings Reinforced by Spherical WC Particles. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 34, 433–439 (2019). https://doi.org/10.1007/s11595-019-2070-6
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DOI: https://doi.org/10.1007/s11595-019-2070-6