梁存光,李新梅,张鹏飞.等离子喷涂WC-12Co涂层抗冲刷磨损行为[J].表面技术,2017,46(9):7-12.
LIANG Cun-guang,LI Xin-mei,ZHANG Peng-fei.Erosion Wear Behavior of WC-12Co Coatings Prepared by APS[J].Surface Technology,2017,46(9):7-12 |
| 等离子喷涂WC-12Co涂层抗冲刷磨损行为 |
| Erosion Wear Behavior of WC-12Co Coatings Prepared by APS |
| 投稿时间：2017-03-15 修订日期：2017-09-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.09.002 |
| 中文关键词: 等离子喷涂 WC-12Co涂层 冲刷磨损 显微硬度 脱碳 截面形貌 |
| 英文关键词:atmospheric plasma spraying WC-12Co composite coating erosion wear micro-hardness decarbonization cross-sectional images |
| 基金项目:国家自然科学基金项目（51561029） |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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°). |
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