等离子喷涂WC-12Co涂层抗冲刷磨损行为
发布时间：2018-11-20 19:51
【摘要】：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300μm,粘结层厚度为50μm。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。
[Abstract]:Objective to explore the ability of WC-12Co composite coating to resist erosion wear. Methods WC-12Co composite coatings were prepared on Q235 steel by atmospheric plasma spraying (APS) method. The microstructure, phase composition and composition of the coating were analyzed by scanning electron microscope (SEM) (SEM), X ray diffractometer (XRD) and energy dispersive spectrometer (EDS),). The mechanical properties of the coating were characterized by Vickers microhardness meter. The erosion wear test of the coating was carried out by using a self-made dry sand mold erosion wear tester at room temperature. Results the coating was mainly composed of WC and a small amount of W _ 2C _ (3) C _ (3) and Co6W6C. The coating is mainly mechanically bonded, accompanied by micrometallurgical bonding. The average cross section microhardness is 300 渭 m for 1169HV0.05.WC-12Co coating and 50 渭 m for bonding layer. When the scour angle is 60 掳, the weight loss rate of the coating is the highest, and the weight loss rate of the coating is the lowest at 30 掳for 0.4788 mg/g;, 0.3696 mg/g.. Conclusion when the scour angle is 30 掳, it has better resistance to plastic scour, the maximum erosion loss rate appears when the scour angle is 60 掳, the effect of erosion wear resistance is poor, and the brittleness erosion wear resistance is better when the angle is 90 掳.
【作者单位】： 新疆大学机械工程学院;
【基金】：国家自然科学基金项目(51561029)~~
【分类号】：TG174.44
本文编号：2345825
[Abstract]:Objective to explore the ability of WC-12Co composite coating to resist erosion wear. Methods WC-12Co composite coatings were prepared on Q235 steel by atmospheric plasma spraying (APS) method. The microstructure, phase composition and composition of the coating were analyzed by scanning electron microscope (SEM) (SEM), X ray diffractometer (XRD) and energy dispersive spectrometer (EDS),). The mechanical properties of the coating were characterized by Vickers microhardness meter. The erosion wear test of the coating was carried out by using a self-made dry sand mold erosion wear tester at room temperature. Results the coating was mainly composed of WC and a small amount of W _ 2C _ (3) C _ (3) and Co6W6C. The coating is mainly mechanically bonded, accompanied by micrometallurgical bonding. The average cross section microhardness is 300 渭 m for 1169HV0.05.WC-12Co coating and 50 渭 m for bonding layer. When the scour angle is 60 掳, the weight loss rate of the coating is the highest, and the weight loss rate of the coating is the lowest at 30 掳for 0.4788 mg/g;, 0.3696 mg/g.. Conclusion when the scour angle is 30 掳, it has better resistance to plastic scour, the maximum erosion loss rate appears when the scour angle is 60 掳, the effect of erosion wear resistance is poor, and the brittleness erosion wear resistance is better when the angle is 90 掳.
【作者单位】： 新疆大学机械工程学院;
【基金】：国家自然科学基金项目(51561029)~~
【分类号】：TG174.44
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