| 摘要: |
| 采用国际上最新的活性燃烧高速燃气喷涂（AC?HVAF）技术制备出WC?12Co金属陶瓷涂层。涂层的X射线衍射检测表明，涂层制备过程中未出现WC粒子的氧化和脱碳现象，涂层相结构基本保持了喂料粉末状态；对制备涂层进行的旋转圆盘空蚀试验表明，WC?12Co硬质涂层抗泥沙磨损性能出色，磨损量仅为不锈钢的1/10；其耐空蚀性能则相反，不及对比0Cr13Ni5Mo不锈钢；对涂层的空蚀破坏机理做了分析，对沙粒磨损损伤特点做了初步探讨。 |
| 关键词: 空蚀；磨损 水轮机； HVAF；WC?12Co |
| DOI： |
| 分类号: |
| 基金项目:国家863计划(2002AA331080)和北京市重大科技项目(H024200050021) |
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| The Cavitation Behavior and Slurry Wear Resistance of WC-12Co Cermets Coatings Sprayed by AC?HVAF Technology |
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WANG Guo-gang, SUN Dong-bai, FAN Zi-shuan, YU Hong-ying, MENG Hui-ming, MA Guang, XU Jie
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The School of Materials Science and Engineering, University of Science and Technology Beijing 10008
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| Abstract: |
| The WC-12 Co cermet coating was deposited by means of the newly developed in the world active combustion-high velocity air fuel (AC?HVAF) Technology. The X?Ray diffraction was employed to identify the chemical composition of the feedstock powder, as?sprayed and heat- treatment coatings. The patterns indicated that the chemical composition kept similarly, without W2C peak. The cavitation erosion and slurry erosion tests were carried out with the rotating disc equipment, the results showed that the WC?12Co coatings exhibited excellent slurry wear resistance than the sample made of 0Cr13Ni5Mo stainless steel. At last the mechanism of cavitation damage was discussed. |
| Key words: cavitation wear hydraulic turbine the active combustion high velocity air fuel spray (AC?HVAF) WC?12Co |
