目的 探索WC-12Co复合涂层抗冲刷磨损的能力。方法 采用大气等离子喷涂（APS）方法在Q235钢基体上制备WC-12Co复合涂层。用扫描电镜（SEM）、X射线衍射仪（XRD）和能谱仪（EDS），对涂层微观形貌和相组成及成分进行分析。采用维氏显微硬度计表征了涂层的力学性能。采用自制的干砂型常温冲刷磨损试验机对涂层进行冲刷磨损实验。结果 所制备的涂层主要由WC以及少量的W2C、Co3W3C和Co6W6C相组成。涂层以机械结合方式为主，同时伴有微冶金结合。截面显微硬度高于粘结层，其截面平均显微硬度为1169HV0.05。WC-12Co涂层厚度为300 μm，粘结层厚度为50 μm。在冲刷角为60°时涂层失重率最大，为0.4788 mg/g；在30°时涂层失重率最小，为0.3696 mg/g。结论 在小角度30°冲刷时，具有较好的抗塑性冲刷磨损能力；在冲刷角为60°时出现最大的冲刷失重率，抗冲刷磨损效果较差；在大角度90°时，有一定的抗脆性冲刷磨损性能。

To study the erosion wear resistance of WC-12Co composite coatings. in this paper,WC-12Co composite coatings was prepared on Q235 steel substrate by atmospheric plasma spraying (APS) method. The microstructure, phase composition and erosion wear be-havior of the obtained coatings were studied by using a variety of analytical techniques, such as XRD, SEM, EDS and self-made dry sand erosion wear tester. The mechanical properties of the coating were characterized by the Vivtorinox microhardness tester. showed that the coatings was mainly composed of WC, and a small amount of W2C, Co3W3C and Co6W6C phase. The coatings was about 300 ?m thick,the bonding coatings was about 50 ?m thick, and the cross-sectional microhardness was 1169HV0.05 at a load of 0.5 N. The maximum mass loss of the coating is 0.4788 mg/g at 60 degrees, and the minimum mass loss of the coating is about 0.3696 mg/g at 30 degrees. the wear loss firstly increase then decrease with the growth of the erosion angle, and amounted to the maximum value when the erosion angle was 60°. The coatings mainly subjected to plastic wear at the small angle (30°) while it subjected to brittle one at the large angle (90°).